**APPENDIX A**

**Glossary**

Terms are given in alphabetical order with numbers preceding letters,
lower-case preceding upper-case letters, and Greek Letters following.

+--------------+----------------------------------------------+--------+
| ## Parameter | **Definition**                               | **Cha  |
|              |                                              | pter** |
+==============+==============================================+========+
| a            | Parameter used in the Watt spectrum.         | 5      |
+--------------+----------------------------------------------+--------+
| a*~l~*       | *l*^th^ Legendre coefficient.                | 4,6,14 |
+--------------+----------------------------------------------+--------+
| A~k,*l*~     | Probability of emission of a γ ray of energy | 11     |
|              | E~γ~=ε~k~-ε~l~ as a result of the residual   |        |
|              | nucleus having a transition from the k^th^   |        |
|              | to the *l*^th^ level.                        |        |
+--------------+----------------------------------------------+--------+
| A*~l~*       | Legendre coefficients (LANG=0) or μ,p~i~     | 6      |
|              | pairs for tabulated angular distribution     |        |
|              | (LANG\>0).                                   |        |
+--------------+----------------------------------------------+--------+
| A~n~         | Mass of the n^th^ type atom; A~o~ is mass of | 7      |
|              | the principal scattering atom in molecule.   |        |
+--------------+----------------------------------------------+--------+
| ABN          | Abundance (weight fraction) of an isotope in | 2,32   |
|              | this material.                               |        |
+--------------+----------------------------------------------+--------+
| AC           | Channel radius                               | 2      |
+--------------+----------------------------------------------+--------+
| AC~1~,       | Background constants for the Adler-Adler     | 2      |
| AC~2~,       | radiative capture cross section.             |        |
| AC~3~,       |                                              |        |
|              |                                              |        |
| AC~4~,       |                                              |        |
| BC~1~, BC~2~ |                                              |        |
+--------------+----------------------------------------------+--------+
| AF~1~,       | Background constants for the Adler-Adler     | 2      |
| AF~2~,       | fission cross section.                       |        |
| AF~3~,       |                                              |        |
|              |                                              |        |
| AF~4~,       |                                              |        |
| BF~1~, BF~2~ |                                              |        |
+--------------+----------------------------------------------+--------+
| AG           | Reduced-width amplitude.                     | 2      |
+--------------+----------------------------------------------+--------+
| AJ           | Floating-point value of compound nucleus     | 2,32   |
|              | spin, J (resonance spin).                    |        |
+--------------+----------------------------------------------+--------+
| AL           | Floating point value of the angular          | 2      |
|              | momentum, *l*.                               |        |
+--------------+----------------------------------------------+--------+
| ALAB         | Mnemonic of laboratory originating           | 1      |
|              | evaluation.                                  |        |
+--------------+----------------------------------------------+--------+
| A            | Exit-*l*-value for reaction.                 | 2      |
| LRE1...ALRE4 |                                              |        |
+--------------+----------------------------------------------+--------+
| AMUF         | Number of degrees of freedom used in         | 2      |
|              | fission-width distribution.                  |        |
+--------------+----------------------------------------------+--------+
| AMUG         | Number of degrees of freedom used in         | 2      |
|              | radiation-width distribution.                |        |
+--------------+----------------------------------------------+--------+
| AMUN         | Number of degrees of freedom used in         | 2      |
|              | neutron-width distribution.                  |        |
+--------------+----------------------------------------------+--------+
| AMUX         | Number of degrees of freedom used in         | 2      |
|              | competitive-width distribution.              |        |
+--------------+----------------------------------------------+--------+
| AP           | Scattering radius.                           | 2,32   |
+--------------+----------------------------------------------+--------+
| APL          | *l*-dependent scattering radius.             | 2      |
+--------------+----------------------------------------------+--------+
| APSX         | Total mass in neutron units of the n         | 6      |
|              | particles being treated by LAW=6.            |        |
+--------------+----------------------------------------------+--------+
| AS           | Floating point value of channel-spin s.      | 2      |
+--------------+----------------------------------------------+--------+
| AT~1~,       | Background constants for the Adler-Adler     | 2      |
| AT~2~,       | total cross section.                         |        |
| AT~3,~       |                                              |        |
|              |                                              |        |
| AT~4~,       |                                              |        |
| BT~1~, BT~2~ |                                              |        |
+--------------+----------------------------------------------+--------+
| AUTH         | Author of evaluation.                        | 1      |
+--------------+----------------------------------------------+--------+
| AVGG         | Statistical R-matrix parameter.              | 2      |
+--------------+----------------------------------------------+--------+
| AWD          | Atomic mass (not a ratio) of the daughter    | 2      |
|              | nucleus.                                     |        |
+--------------+----------------------------------------------+--------+
| AWI          | Projectile mass in neutron units.            | 1      |
+--------------+----------------------------------------------+--------+
| AWP          | Product mass in neutron units.               | 6      |
+--------------+----------------------------------------------+--------+
| AWR          | Ratio of mass of atom (or molecule) to that  | all    |
|              | of the neutron.                              |        |
+--------------+----------------------------------------------+--------+
| AWRI         | Ratio of mass of particular isotope to that  | 2,32   |
|              | of the neutron.                              |        |
+--------------+----------------------------------------------+--------+
| AWRIC        | Mass-ratio for charged-particle exit channel | 2      |
|              | (see page D.40).                             |        |
+--------------+----------------------------------------------+--------+
| AWT          | Nuclear mass (not a ratio) of outgoing       | 2      |
|              | particle.                                    |        |
+--------------+----------------------------------------------+--------+
| AZD          | Atomic number of daughter nucleus.           | 2      |
+--------------+----------------------------------------------+--------+
| AZP          | Atomic number of outgoing particle.          | 2      |
+--------------+----------------------------------------------+--------+
| b            | Parameter used in Watt spectrum.             | 5      |
+--------------+----------------------------------------------+--------+
| b~i~(E,E\')  | Representation of angular part of            | 6      |
|              | f~i~(μ,E,E\').                               |        |
+--------------+----------------------------------------------+--------+
| B~i~(N)      | List of constants.                           | 7,12   |
+--------------+----------------------------------------------+--------+
| BC           | Boundary-condition parameter.                | 2      |
+--------------+----------------------------------------------+--------+
| BR           | Branching ratio for production of a          | 8      |
|              | particular nuclide and level.                |        |
+--------------+----------------------------------------------+--------+
| C~n~         | Coefficients of a polynomial; NC             | 1      |
|              | coefficients are given.                      |        |
+--------------+----------------------------------------------+--------+
| C~n~(E~i~)   | Array of yield data for the i^th^ energy     | 8      |
|              | point; contains 4 parameters per fission     |        |
|              | product.                                     |        |
+--------------+----------------------------------------------+--------+
| CI           | Channel index.                               | 2      |
+--------------+----------------------------------------------+--------+
|              | Coefficient of the cross section for a       | 31,33  |
|              | reaction contributing to the value of a      |        |
|              | \"derived\" cross section (usually ±1.0).    |        |
+--------------+----------------------------------------------+--------+
| CONT         | Smallest possible ENDF record, a \"control\" | all    |
|              | record.                                      |        |
+--------------+----------------------------------------------+--------+
| CT           | Chain indicator.                             | 8      |
+--------------+----------------------------------------------+--------+
| D            | Mean level spacing for a particular J-state. | 2,32   |
+--------------+----------------------------------------------+--------+
| DDATE        | Original distribution date of the            | 1      |
|              | evaluation.                                  |        |
+--------------+----------------------------------------------+--------+
| DE^2^        | Variance of the resonance energy ER.         | 32     |
+--------------+----------------------------------------------+--------+
| DEC~r~^\*^   | Resonance energy for the radiative capture   | 2      |
|              | cross section.                               |        |
+--------------+----------------------------------------------+--------+
| DEF~r~^\*^   | Resonance energy for the fission cross       | 2      |
|              | section.                                     |        |
+--------------+----------------------------------------------+--------+
| DET~r~[^1]   | Adler-Adler resonance energy for the total   | 2      |
|              | cross section.                               |        |
+--------------+----------------------------------------------+--------+
| DF^2^        | Variance of GF.                              | 32     |
+--------------+----------------------------------------------+--------+
| DG^2^        | Variance of GG.                              | 32     |
+--------------+----------------------------------------------+--------+
| DGDF         | Covariance of GG and GF.                     | 32     |
+--------------+----------------------------------------------+--------+
| DJ^2^        | Variance of AJ.                              | 32     |
+--------------+----------------------------------------------+--------+
| DJDF         | Covariance of AJ and GF.                     | 32     |
+--------------+----------------------------------------------+--------+
| DJDF         | Covariance of AJ and GF.                     | 32     |
+--------------+----------------------------------------------+--------+
| DJDG         | Covariance of AJ and GG.                     | 32     |
+--------------+----------------------------------------------+--------+
| DJDN         | Covariance of AJ an GN.                      | 32     |
+--------------+----------------------------------------------+--------+
| DN^2^        | Variance of GN.                              | 32     |
+--------------+----------------------------------------------+--------+
| DNDF         | Covariance of GN and GF.                     | 32     |
+--------------+----------------------------------------------+--------+
| DNDG         | Covariance of GN and GG.                     | 32     |
+--------------+----------------------------------------------+--------+
| DWC~r~^\*^   | Value of Γ/2, (ν), used for the radiative    | 2      |
|              | capture cross section.                       |        |
+--------------+----------------------------------------------+--------+
| DWF~r~^\*^   | Value of Γ/2, (ν), used for the fission      | 2      |
|              | cross section.                               |        |
+--------------+----------------------------------------------+--------+
| DWT~r~^\*^   | Value of Γ/2, (ν), used for the total cross  | 2      |
|              | section.                                     |        |
+--------------+----------------------------------------------+--------+
| DYC          | 1-σ uncertainty in cumulative                | 8      |
|              | fission-product yield.                       |        |
+--------------+----------------------------------------------+--------+
| DYI          | 1-σ uncertainty in fractional independent    | 8      |
|              | fission-product yield.                       |        |
+--------------+----------------------------------------------+--------+
| {E~k~}       | List of energies for a covariance file       | 32-40  |
|              | energy grid                                  |        |
+--------------+----------------------------------------------+--------+
| E            | Energy of the incident neutron (eV).         | all    |
+--------------+----------------------------------------------+--------+
| E′           | Secondary neutron energy (eV).               | 5,6,7  |
+--------------+----------------------------------------------+--------+
| E1,E2        | Range of neutron energies.                   | 31,33  |
+--------------+----------------------------------------------+--------+
| E~avail~     | Available energy.                            | 5      |
+--------------+----------------------------------------------+--------+
| E~int~       | Interpolation scheme for each energy range   | all    |
|              | (Appendix E).                                |        |
+--------------+----------------------------------------------+--------+
| E~th~        | Threshold energy.                            | 3      |
+--------------+----------------------------------------------+--------+
| E~\"x\"~     | Average decay energy (eV) of \"x\" radiation | 8      |
|              | for decay heat applications.                 |        |
+--------------+----------------------------------------------+--------+
| EB           | Total energy released by delayed β\'s.       | 1      |
+--------------+----------------------------------------------+--------+
| EBAR         | Statistical R-matrix parameter               | 2      |
+--------------+----------------------------------------------+--------+
| EBI          | Binding energy for subshell (eV)             | 28     |
+--------------+----------------------------------------------+--------+
| ED           | Logarithmic parameter for a R-matrix element | 2      |
+--------------+----------------------------------------------+--------+
| EDATE        | Date of evaluation.                          | 1      |
+--------------+----------------------------------------------+--------+
| EFH          | Constant in energy-department fission        | 5      |
|              | spectrum                                     |        |
+--------------+----------------------------------------------+--------+
| EFL          | Constant in energy-department fission        | 5      |
|              | spectrum                                     |        |
+--------------+----------------------------------------------+--------+
|              | Fluorescence yield (eV/photo-ionization).    | 23     |
|              | Value is zero if not photoelectric subshell  |        |
|              | ionization cross section.                    |        |
+--------------+----------------------------------------------+--------+
| EFR          | Kinetic energy of the fragments.             | 1,5    |
+--------------+----------------------------------------------+--------+
| EG~k~        | Photon energy or Binding Energy.             | 12     |
|              |                                              | ,13,14 |
+--------------+----------------------------------------------+--------+
| EGD          | Total energy released by the emission of     | 1      |
|              | delayed γ rays.                              |        |
+--------------+----------------------------------------------+--------+
| EGP          | Total energy released by the emission of     | 1      |
|              | \"prompt\" γ-rays.                           |        |
+--------------+----------------------------------------------+--------+
| EH           | Upper limit for a resonance region energy    | 2,32   |
|              | range.                                       |        |
+--------------+----------------------------------------------+--------+
| EI           | Energy points where the weighting of the     | 31,33  |
|              | standard cross is given.                     |        |
+--------------+----------------------------------------------+--------+
| EL           | Lower limit for a resonance region energy    | 2,32   |
|              | range.                                       |        |
+--------------+----------------------------------------------+--------+
| ELFS         | Excitation energy of the reaction product.   | 8      |
+--------------+----------------------------------------------+--------+
| ELIS         | Excitation energy of the target nucleus.     | 1      |
+--------------+----------------------------------------------+--------+
| ELN          | Number of electrons in subshell when         | 28     |
|              | neutral.                                     |        |
+--------------+----------------------------------------------+--------+
| EMAX         | Upper limit of energy range for evaluation   | 1      |
+--------------+----------------------------------------------+--------+
| END          | Kinetic energy of the delayed fission        | 1      |
|              | neutrons.                                    |        |
+--------------+----------------------------------------------+--------+
|              | End-point energy of the particle or quantum  | 8      |
|              | emitted.                                     |        |
+--------------+----------------------------------------------+--------+
| ENDATE       | Master file entry date (yyyymmdd).           | 1      |
+--------------+----------------------------------------------+--------+
| ENP          | Kinetic energy of the \"prompt\" fission     | 1      |
|              | neutrons.                                    |        |
+--------------+----------------------------------------------+--------+
| ENU          | Energy carried away by neutrinos.            | 1      |
+--------------+----------------------------------------------+--------+
| EPE          | Sub-shell binding energy (equal to           | 23     |
|              | photoelectric edge energy) in eV. The value  |        |
|              | is zero if MT≠534-599.                       |        |
+--------------+----------------------------------------------+--------+
| ER           | Total energy release due to fission minus    | 1      |
|              | neutrino energy.                             |        |
+--------------+----------------------------------------------+--------+
|              | Resonance energy (in the laboratory system). | 2,32   |
+--------------+----------------------------------------------+--------+
|              | Energy (eV) of radiation produced.           | 8      |
+--------------+----------------------------------------------+--------+
| ER~AV~       | Average decay energy of radiation produced.  | 8      |
+--------------+----------------------------------------------+--------+
| ES~i~        | Energy of the i^th^ level.                   | 12     |
+--------------+----------------------------------------------+--------+
| ES~k~        | Energy of the level from which the photon    | 12     |
|              | originates.                                  | ,13,14 |
+--------------+----------------------------------------------+--------+
| ES(N)        | Energy of N^th^ point used to tabulate       | 2      |
|              | energy-dependent widths.                     |        |
+--------------+----------------------------------------------+--------+
| ET           | Total energy release due to fission.         | 1      |
+--------------+----------------------------------------------+--------+
| ET(E)        | Energy transfer during electro-atomic        | 26     |
|              | excitation or bremsstrahlung                 |        |
+--------------+----------------------------------------------+--------+
| # ETR        | Energy of transition (eV)                    | 28     |
+--------------+----------------------------------------------+--------+
| EU           | Logarithmic parameter for a R-matrix element | 2      |
+--------------+----------------------------------------------+--------+
| f~i~(μ,E,E′) | Normalized product energy-angle distribution | 6      |
+--------------+----------------------------------------------+--------+
| f~k~(E → E′) | k^th^ partial energy distribution;           | 5      |
|              | definition depends on LF value.              |        |
+--------------+----------------------------------------------+--------+
| F(q;Z)       | Form factor for coherent photon scattering.  | 27     |
+--------------+----------------------------------------------+--------+
| F~x          | Covariance components correlated over the    | 31-40  |
| ,k,k′~^(LB)^ | energy interval with lower edges E~k~ and    |        |
|              | E~k′~ (exact definition depends on LB value. |        |
+--------------+----------------------------------------------+--------+
| FC           | Continuum spectrum normalization factor.     | 8      |
+--------------+----------------------------------------------+--------+
| FD           | Discrete spectrum normalization factor.      | 8      |
+--------------+----------------------------------------------+--------+
| FPS          | Floating-point value of state designator for | 8      |
|              | a fission product nuclide.                   |        |
+--------------+----------------------------------------------+--------+
| FTR          | Fractional probability for transition.       | 28     |
+--------------+----------------------------------------------+--------+
| g(E~γ~ ← E)  | Particular class of the functions g~j~(E~γ~  | 15     |
|              | ← E) tabulated in File 15; in units eV^-1^.  |        |
+--------------+----------------------------------------------+--------+
| g~j~(E~γ~ ←  | j^th^ normalized partial distribution; in    | 15     |
| E)           | units eV^-1^.                                |        |
+--------------+----------------------------------------------+--------+
| GE           | Eliminated width.                            | 2      |
+--------------+----------------------------------------------+--------+
| GF           | Fission width Γ~f~ evaluated at resonance    | 2,32   |
|              | energy ER.                                   |        |
+--------------+----------------------------------------------+--------+
|              | Average fission width - may be energy        | 2      |
|              | dependent.                                   |        |
+--------------+----------------------------------------------+--------+
| GFA          | First partial fission width                  | 2      |
+--------------+----------------------------------------------+--------+
| GFB          | Second partial fission width                 | 3      |
+--------------+----------------------------------------------+--------+
| GG           | Radiation width Γ~γ~ evaluated at resonance  | 2,32   |
|              | energy ER.                                   |        |
+--------------+----------------------------------------------+--------+
|              | Average radiation width - energy dependent   | 2      |
|              | if LRU=2.                                    |        |
+--------------+----------------------------------------------+--------+
| GIC~r~       | Asymmetrical capture parameter.              | 2      |
+--------------+----------------------------------------------+--------+
| GIF~r~       | Asymmetrical fission parameter.              | 2      |
+--------------+----------------------------------------------+--------+
| GIT~r~       | Related to the asymmetrical total cross      | 2      |
|              | section parameter.                           |        |
+--------------+----------------------------------------------+--------+
| GN           | Neutron width Γ~n~ evaluated at resonance    | 2,32   |
|              | energy ER.                                   |        |
+--------------+----------------------------------------------+--------+
| GN0          | Average reduced neutron width; energy        | 2      |
|              | dependent.                                   |        |
+--------------+----------------------------------------------+--------+
| GP~j,i~ ≡    | Conditional probability of photon emission   | 12     |
| Gp~i~        | in a direct transition from level j to level |        |
|              | i, i \< j.                                   |        |
+--------------+----------------------------------------------+--------+
| GRC~r~       | Symmetrical capture parameter.               | 2      |
+--------------+----------------------------------------------+--------+
| GRE1...GRE4  | Partial widths.                              | 2      |
+--------------+----------------------------------------------+--------+
| GRF~r~       | Symmetrical fission parameter.               | 2      |
+--------------+----------------------------------------------+--------+
| GRT~r~       | Related to symmetrical total cross section   | 2      |
|              | parameter.                                   |        |
+--------------+----------------------------------------------+--------+
| GT           | Resonance total width Γ evaluated ate        | 2,32   |
|              | resonance energy ER.                         |        |
+--------------+----------------------------------------------+--------+
| GX           | Competitive width Γ~x~ evaluated at          | 2      |
|              | resonance energy ER, or, average competitive |        |
|              | reaction width.                              |        |
+--------------+----------------------------------------------+--------+
| H(q;Z)       | Form factor or incoherent scattering         | 27     |
|              | function; either F(q;Z) or S(q;Z),           |        |
|              | respectively.                                |        |
+--------------+----------------------------------------------+--------+
| H(N)         | Array containing text information that       | 1      |
|              | describes evaluated data set.                |        |
+--------------+----------------------------------------------+--------+
| HEAD         | First record in a section                    | all    |
+--------------+----------------------------------------------+--------+
| HL           | Half life of the reaction product.           | 8      |
+--------------+----------------------------------------------+--------+
| HSUB         | Library identifier (eye-readable)            | 1      |
+--------------+----------------------------------------------+--------+
| I            | Normalizing denominator (see 5.3).           | 5      |
+--------------+----------------------------------------------+--------+
| I~i~         | Interpolation scheme (see Appendix E) to be  | 8      |
|              | used between the E~i-1~ and E~i~ energy      |        |
|              | points.                                      |        |
+--------------+----------------------------------------------+--------+
| IDP          | Resonance parameter identification number.   | 2,32   |
+--------------+----------------------------------------------+--------+
| INT          | Statistical parameter for R-matrix element   | 2      |
|              | (LRU=1, LRF=5), or, interpolation scheme     |        |
|              | used for interpolating between cross         |        |
|              | sections obtained from average resonance     |        |
|              | parameters (LRU=2).                          |        |
+--------------+----------------------------------------------+--------+
| INT(m)       | Interpolation scheme identification number   | 0      |
|              | used in m^th^ range.                         |        |
+--------------+----------------------------------------------+--------+
| IPS          | Imaginary part of a non-hard-sphere phase    | 2      |
|              | shift.                                       |        |
+--------------+----------------------------------------------+--------+
| IPS(e)       | Real part of PS(E).                          | 2      |
+--------------+----------------------------------------------+--------+
| IR0(e)       | Imaginary part of R0(E).                     | 2      |
+--------------+----------------------------------------------+--------+
| IRP          | Imaginary part of background-R-matrix        | 2      |
|              | element.                                     |        |
+--------------+----------------------------------------------+--------+
| ISG          | Spin group index.                            | 2      |
+--------------+----------------------------------------------+--------+
| ISH          | Shift function flag.                         | 2      |
+--------------+----------------------------------------------+--------+
| k            | Boltzmann\'s constant.                       | 7      |
+--------------+----------------------------------------------+--------+
| L            | Value of the *l* state (neutron angular      |        |
|              | momentum).                                   |        |
+--------------+----------------------------------------------+--------+
| LA           | Value of *l* (for the *l*^th^ coefficient).  |        |
+--------------+----------------------------------------------+--------+
| LAD          | Angular distribution flag                    |        |
+--------------+----------------------------------------------+--------+
| LANG         | Angular distribution indicator               |        |
+--------------+----------------------------------------------+--------+
| LASYM        | Flag indicating whether asymmetric S(α,β) is |        |
|              | given.                                       |        |
+--------------+----------------------------------------------+--------+
| LAT          | Flag indicating which temperature has been   | 7      |
|              | used to compute α and β.                     |        |
+--------------+----------------------------------------------+--------+
| LAW          | Distinguishes between different              | 6      |
|              | representations of f~i~, the normalized      |        |
|              | product energy-single distribution           |        |
+--------------+----------------------------------------------+--------+
| LB           | Flag which determines meanings of the        | 8,     |
|              | F-numbers in the arrays                      | 31,33, |
|              | {E~k~,F~k~}{E*~l~*,F*~l~*} .                 | 34,40  |
+--------------+----------------------------------------------+--------+
| LBK          | Background R-matrix parameter (LRU=1,        | 2      |
|              | LRF=5), or, background-R-function flag       |        |
|              | (LRU=1, LRF=6).                              |        |
+--------------+----------------------------------------------+--------+
| LCOMP        | Indicates ENDF-5 compatible format.          | 32     |
+--------------+----------------------------------------------+--------+
| LCON         | Continuum spectrum flag.                     | 8      |
+--------------+----------------------------------------------+--------+
| LCOV         | Indicates whether covariance data are given. | 8      |
+--------------+----------------------------------------------+--------+
| LCT          | Indicates which reference frame is used for  | 4,6    |
|              | both secondary angles and energies.          |        |
+--------------+----------------------------------------------+--------+
| LDRV         | Distinguishes between different evaluations  | 1      |
|              | with the same material keys                  |        |
+--------------+----------------------------------------------+--------+
| LE           | Indicates whether energy-dependent           | 8      |
|              | fission-product yields are given.            |        |
+--------------+----------------------------------------------+--------+
| LEP          | Selects interpolation scheme for secondary   | 6      |
|              | energy.                                      |        |
+--------------+----------------------------------------------+--------+
| LF           | Specifies the energy distribution law that   | 5,6,   |
|              | is used for a particular subsection (partial | 12,13, |
|              | energy distribution).                        | 15     |
+--------------+----------------------------------------------+--------+
| LFI          | Indicates whether this material is           | 1      |
|              | fissionable.                                 |        |
+--------------+----------------------------------------------+--------+
| LFS          | Indicator that specifies the final excited   | 3,8,9  |
|              | state of the residual nucleus produced by a  | ,10,40 |
|              | particular reaction.                         |        |
+--------------+----------------------------------------------+--------+
| LFW          | Indicates whether average fission widths are | 2,32   |
|              | given in the unresolved resonance region for |        |
|              | this isotope.                                |        |
+--------------+----------------------------------------------+--------+
| LG           | Transition probability array flag for        | 12     |
|              | distinguishing between doublet and triplet   |        |
|              | arrays in File 12.                           |        |
+--------------+----------------------------------------------+--------+
| LI           | Indicates kind of Adler-Adler parameters     | 2      |
|              | given.                                       |        |
+--------------+----------------------------------------------+--------+
|              | Isotropy flag.                               | 4,14   |
+--------------+----------------------------------------------+--------+
|              | Temperature interpolation flag.              | 7      |
+--------------+----------------------------------------------+--------+
| LIBF         | Sub-library where some data are sensitive to | 30     |
|              | the same model parameters as data in present |        |
|              | sub-library/material.                        |        |
+--------------+----------------------------------------------+--------+
| LIDP         | Identifies identical particles for LAW=5.    | 6      |
+--------------+----------------------------------------------+--------+
| LIP          | Product modifier flag.                       | 8      |
+--------------+----------------------------------------------+--------+
| LIS          | State number of the target nucleus (for      | 1,3,8  |
|              | materials that represent nuclides).          | ,9,10, |
|              |                                              | 40     |
+--------------+----------------------------------------------+--------+
| LISO         | Isomeric state number of the target nucleus. | 1,8    |
+--------------+----------------------------------------------+--------+
| LIST         | Record used to list a series of numbers.     | all    |
+--------------+----------------------------------------------+--------+
| LLN          | Indicates form for storing S(α,β).           | 7      |
+--------------+----------------------------------------------+--------+
| LMF          | File number for this MT containing           | 8      |
|              | multiplicity or cross section.               |        |
+--------------+----------------------------------------------+--------+
| LNU          | Indicates representation of                  | 1      |
|              | $\overline{\nu}$(E) used.                    |        |
+--------------+----------------------------------------------+--------+
| LO           | Indicates whether multiplicities or          | 12     |
|              | transition probability arrays given.         |        |
+--------------+----------------------------------------------+--------+
| LP           | Indicates whether particular photon is a     | 12,13  |
|              | primary.                                     |        |
+--------------+----------------------------------------------+--------+
| LPS          | Optical model phase shift flag               | 2      |
+--------------+----------------------------------------------+--------+
| LR           | Defines x in (n,n\'x); used in the reactions | 3      |
|              | MT=51, 52, 53,..., 90, and 91. (See Section  |        |
|              | 3.4.4.)                                      |        |
+--------------+----------------------------------------------+--------+
| LREL         | Release number                               | 1      |
+--------------+----------------------------------------------+--------+
| LRF          | Indicates which resonance parameter          | 2,32   |
|              | representation used for energy range;        |        |
|              | definition depends on value of LRU for       |        |
|              | range.                                       |        |
+--------------+----------------------------------------------+--------+
| LRP          | Indicates whether resolved and/or unresolved | 1      |
|              | resonance parameters given in File 2.        |        |
+--------------+----------------------------------------------+--------+
| LRU          | Indicates whether energy range contains data | 2,32   |
|              | for resolved or unresolved resonance         |        |
|              | parameters.                                  |        |
+--------------+----------------------------------------------+--------+
| LRX          | Indicates whether a competitive width is     | 2      |
|              | given.                                       |        |
+--------------+----------------------------------------------+--------+
| LS           | Indicates whether F~k,k~, matrix is          | 31     |
|              | asymmetric or symmetric (LB=5 or 7).         | ,33,35 |
+--------------+----------------------------------------------+--------+
| LSSF         | Indicates how File 2 and File 3 are to be    | 2,32   |
|              | combined.                                    |        |
+--------------+----------------------------------------------+--------+
| LT           | Temperature dependence (see Appendix F).     | 0      |
+--------------+----------------------------------------------+--------+
|              | Specifies whether temperature-dependent data | 3,4    |
|              | are given.                                   | ,5,6,7 |
+--------------+----------------------------------------------+--------+
|              | Number of pairs of numbers in the array      | 31,33  |
|              | {E*~l~*,F*~l~*}.                             |        |
+--------------+----------------------------------------------+--------+
| LTHR         | Thermal data flag.                           | 7      |
+--------------+----------------------------------------------+--------+
| LTP          | Specifies representation used for LAW=5.     | 6      |
+--------------+----------------------------------------------+--------+
| LTT          | Specifies whether Legendre or probability    | 4,6,14 |
|              | representation used.                         |        |
+--------------+----------------------------------------------+--------+
|              | Specifies whether Legendre coefficient       | 34     |
|              | covariance data start with a~0~ coefficient. |        |
+--------------+----------------------------------------------+--------+
| LTY          | In \"NC-type\" sub-subsections, indicates    | 31,33  |
|              | the procedure used to obtain the covariance  |        |
|              | matrix.                                      |        |
+--------------+----------------------------------------------+--------+
| LVT          | Specifies whether a transformation matrix    | 4      |
|              | given for elastic scattering.                |        |
+--------------+----------------------------------------------+--------+
| L1           | Integer to be used as a flag or a test.      | 1      |
|              |                                              |        |
|              | Number of Legendre coefficients.             | 34     |
+--------------+----------------------------------------------+--------+
| L2           | Integer to be used as a flag or a test.      | 1      |
+--------------+----------------------------------------------+--------+
| M~n~         | Number of atoms of the n^th^ type in the     | 7      |
|              | molecule.                                    |        |
+--------------+----------------------------------------------+--------+
| MAT          | Material number.                             | 0      |
+--------------+----------------------------------------------+--------+
| MAT1         | Referenced material for covariance data.     | 33     |
+--------------+----------------------------------------------+--------+
| MATF         | MAT in which some data are sensitive to the  | 30     |
|              | same parameter.                              |        |
+--------------+----------------------------------------------+--------+
| MATP         | Material number for the reaction product.    | 8      |
+--------------+----------------------------------------------+--------+
| MATS         | MAT in which a pertinent standard cross      | 31,33  |
|              | section (MTS) exists.                        |        |
+--------------+----------------------------------------------+--------+
| MF           | File number.                                 | 0      |
+--------------+----------------------------------------------+--------+
| MF~n~        | MF of the n^th^ section.                     | 1      |
+--------------+----------------------------------------------+--------+
| MFSEN,MTSEN  | MF,MT of a section in which data are         | 30     |
|              | sensitive to the indicated parameter (MP).   |        |
+--------------+----------------------------------------------+--------+
| MOD~n~       | Modification indicator for section MF~n~ and | 1      |
|              | MT~n~.                                       |        |
+--------------+----------------------------------------------+--------+
| MP           | Model parameter index.                       | 30     |
+--------------+----------------------------------------------+--------+
| MPAR         | Number of parameters for which covariance    | 32     |
|              | data is given.                               |        |
+--------------+----------------------------------------------+--------+
| MPF          | Model parameter index given the same         | 30     |
|              | parameter (MP) in another                    |        |
|              | sublibrary/material                          |        |
+--------------+----------------------------------------------+--------+
| MT           | Reaction type number, or, covariance file    | all    |
|              | section identifier.                          |        |
+--------------+----------------------------------------------+--------+
| MT~n~        | MT of the n^th^ section.                     | 1      |
+--------------+----------------------------------------------+--------+
| MT1          | Referenced reaction type for covariance      | 33     |
|              | data.                                        |        |
+--------------+----------------------------------------------+--------+
| MTL          | Indicates MT that is a component of the      | 33     |
|              | lumped reaction.                             |        |
+--------------+----------------------------------------------+--------+
| MTS          | Reaction type number for relevant standard   | 31,33  |
|              | cross section.                               |        |
+--------------+----------------------------------------------+--------+
| MUF          | Number of degrees of freedom for fission     | 2      |
|              | widths.                                      |        |
+--------------+----------------------------------------------+--------+
| M            | MT values for inelastic or charged particle  | 2      |
| TRE1...MTRE4 | reactions                                    |        |
+--------------+----------------------------------------------+--------+
| N0           | Identifies reaction product that has         | 8      |
|              | radioactive ground state.                    |        |
+--------------+----------------------------------------------+--------+
| N1           | Number of items in a list to follow (except  | 1      |
|              | for MT 451).                                 |        |
+--------------+----------------------------------------------+--------+
| N2           | Number of items in a second list to follow.  | 1      |
+--------------+----------------------------------------------+--------+
| NA           | Number of angles (cosines) at which          | 6      |
|              | secondary distributions given.               |        |
+--------------+----------------------------------------------+--------+
| NAC          | Number of channel radii                      | 2      |
+--------------+----------------------------------------------+--------+
| NAPS         | Controls use of channel radius *a* and       | 2,32   |
|              | scattering radius AP.                        |        |
+--------------+----------------------------------------------+--------+
| NB           | Total number of β value given.               | 7      |
+--------------+----------------------------------------------+--------+
| NBC          | Number of boundary-condition parameters.     | 2      |
+--------------+----------------------------------------------+--------+
| NBK          | Background-R-matrix parameter.               | 2      |
+--------------+----------------------------------------------+--------+
| NBT(n)       | Value of N separating the m^th^ and          | 0      |
|              | (m+1)^th^ interpolation rangers.             |        |
+--------------+----------------------------------------------+--------+
| NC           | Number of terms used in the polynomial       | 1      |
|              | expansion.                                   |        |
+--------------+----------------------------------------------+--------+
|              | Total number of decay energies (eV) given    | 8      |
|              | (NC = 3 or 17).                              |        |
+--------------+----------------------------------------------+--------+
|              | Number of partial distributions used to      | 15     |
|              | represent f(~Eγ~ ← E).                       |        |
+--------------+----------------------------------------------+--------+
|              | Number of \"NC-type\" sub-subsections.       | 31,33  |
+--------------+----------------------------------------------+--------+
| NC~n~        | Number of physical records in the n^th^      | 1      |
|              | section.                                     |        |
+--------------+----------------------------------------------+--------+
| NCH          | Number of channels using particular          | 2      |
|              | background R-matrix element, phase shift,    |        |
|              | penetrability, channel radius, or boundary   |        |
|              | condition (LRU=1, LRF=5).                    |        |
+--------------+----------------------------------------------+--------+
| NCI          | Number of reactions summed to obtain the     | 1      |
|              | reaction of interest.                        |        |
+--------------+----------------------------------------------+--------+
|              | For a \"derived\" cross section, number of   | 31,33  |
|              | reaction types for which cross sections are  |        |
|              | combined in the derivation.                  |        |
+--------------+----------------------------------------------+--------+
| NCP          | Number of channels.                          | 2      |
+--------------+----------------------------------------------+--------+
| NCRE         | Number of charged-particle reactions.        | 2      |
+--------------+----------------------------------------------+--------+
| NCS          | Number of channels in a particular spin      | 2      |
|              | group.                                       |        |
+--------------+----------------------------------------------+--------+
| NCT          | Total number of channels.                    | 2      |
+--------------+----------------------------------------------+--------+
| NCTAB        | Number of CONT records in the corresponding  | 30     |
|              | table.                                       |        |
+--------------+----------------------------------------------+--------+
| ND           | Number of discrete energies (File 6);        | 6      |
+--------------+----------------------------------------------+--------+
|              | Number of branches into which nuclide ZAP    | 8      |
|              | decays.                                      |        |
+--------------+----------------------------------------------+--------+
| NDIR         | Number of CONT records in the MF=30          | 30     |
|              | directory.                                   |        |
+--------------+----------------------------------------------+--------+
| NDK          | Total number of decay modes given.           | 8      |
+--------------+----------------------------------------------+--------+
| NE           | Number of incident-energy points at which    | 2      |
|              | widths given.                                |        |
+--------------+----------------------------------------------+--------+
|              | Number of points at which tabulated          | 4      |
|              | distributions given.                         |        |
+--------------+----------------------------------------------+--------+
|              | Number of points at which θ(E) (file 5)      | 5      |
|              | given.                                       |        |
+--------------+----------------------------------------------+--------+
|              | Number of energy points given in a TAB2      | 14,15  |
|              | record.                                      |        |
+--------------+----------------------------------------------+--------+
| NEI          | Number of energy points in {EI,WEI} list.    | 33     |
+--------------+----------------------------------------------+--------+
| NEP          | Number of secondary energy points.           | 6      |
+--------------+----------------------------------------------+--------+
| NER          | Number of energy ranges given for this       | 2,32   |
|              | isotope.                                     |        |
+--------------+----------------------------------------------+--------+
|              | Total number of discrete energies for given  | 8      |
|              | spectra type (STYP).                         |        |
+--------------+----------------------------------------------+--------+
|              | Number of energies corresponding to the rows | 33     |
|              | of LB=6 covariance matrix.                   |        |
+--------------+----------------------------------------------+--------+
| NF           | Number of channels not requiring a phase     | 2      |
|              | shift.                                       |        |
+--------------+----------------------------------------------+--------+
|              | Number of secondary energy points in         | 5      |
|              | tabulation.                                  |        |
+--------------+----------------------------------------------+--------+
| NFOR         | Library format.                              | 1      |
+--------------+----------------------------------------------+--------+
| NFP          | Number of fission-product nuclide states to  | 8      |
|              | be specified at each incident-energy point.  |        |
+--------------+----------------------------------------------+--------+
| NFRE         | Number of fission reactions.                 | 2      |
+--------------+----------------------------------------------+--------+
| NGRE         | Number of capture reactions.                 | 2      |
+--------------+----------------------------------------------+--------+
| NHS          | Number of channels that require hard-sphere  | 2      |
|              | phase shifts.                                |        |
+--------------+----------------------------------------------+--------+
| NI           | Total number of items in the B(N) list;      | 7      |
|              | NL=6\* (NS + 1).                             |        |
+--------------+----------------------------------------------+--------+
|              | Number of isotropic angular distributions    | 14     |
|              | given in section (MT) for which LI=0,        |        |
|              | *i.e.*, with at least one anisotropic        |        |
|              | distribution).                               |        |
+--------------+----------------------------------------------+--------+
|              | Number of \"NI-type\" sub-subsections.       | 31,33  |
+--------------+----------------------------------------------+--------+
| NIRE         | Number of inelastic reactions.               | 2      |
+--------------+----------------------------------------------+--------+
| NIS          | Number of isotopes in this material.         | 2,32   |
+--------------+----------------------------------------------+--------+
| NJS          | Number of sets of resonance parameters (each | 2,32   |
|              | having the same J state) for a specified     |        |
|              | *l*-state.                                   |        |
+--------------+----------------------------------------------+--------+
| NK           | Number of elements in transformation matrix; | 4      |
|              | NK=(NM+1)^2^.                                |        |
+--------------+----------------------------------------------+--------+
|              | Number of partial energy distributions (one  | 5,6    |
|              | subsection for each partial distribution).   |        |
+--------------+----------------------------------------------+--------+
|              | Number of partial energy distributions       | 8      |
|              | (LCON=5).                                    |        |
+--------------+----------------------------------------------+--------+
|              | Number of discrete photons plus the photon   | 12     |
|              | continuum.                                   | ,13,14 |
+--------------+----------------------------------------------+--------+
|              | Number of subsections in this section (MT).  | 26     |
+--------------+----------------------------------------------+--------+
|              | Number of incident-neutron energy ranges for | 35     |
|              | covariance representation, each with a       |        |
|              | subsection.                                  |        |
+--------------+----------------------------------------------+--------+
| NL           | Highest order Legendre polynomial given at   | 4,6,14 |
|              | each energy.                                 |        |
+--------------+----------------------------------------------+--------+
|              | Number of subsections within a section.      | 33     |
+--------------+----------------------------------------------+--------+
| NLG          | Number of logarithmically parameterized      | 2      |
|              | elements.                                    |        |
+--------------+----------------------------------------------+--------+
| NL1          | Number of Legendre coefficients.             | 34     |
+--------------+----------------------------------------------+--------+
| NLIB         | Library identifier.                          | 1      |
+--------------+----------------------------------------------+--------+
| NLJ          | Count of the number of levels for which      | 2      |
|              | parameters will be given.                    |        |
+--------------+----------------------------------------------+--------+
| NLRS         | Number of subsections containing data on     | 32     |
|              | long-range resonance parameter covariance.   |        |
+--------------+----------------------------------------------+--------+
| NLS          | Number of *l*-values considered; a set of    | 2,32   |
|              | resonance parameters is given for each       |        |
|              | *l*-value.                                   |        |
+--------------+----------------------------------------------+--------+
| NLSC         | Number of *l*-value for convergence.         | 2      |
+--------------+----------------------------------------------+--------+
| NLSJ         | Number of resonances specified by *l*, s,    | 2      |
|              | and J.                                       |        |
+--------------+----------------------------------------------+--------+
| NM           | Maximum order Legendre polynomial required   | 4      |
|              | to describe the angular distributions.       |        |
+--------------+----------------------------------------------+--------+
| NML          | Number of entries in MT list.                | 2      |
+--------------+----------------------------------------------+--------+
| NMOD         | Modification number.                         | 1      |
+--------------+----------------------------------------------+--------+
| NMT1         | Number of subsections, for MT1 ≥ MT.         | 34     |
+--------------+----------------------------------------------+--------+
| NMU          | Number of emission cosine values for LAW=7.  | 6      |
+--------------+----------------------------------------------+--------+
| NN           | Number of elements in the LIST record        | 8      |
+--------------+----------------------------------------------+--------+
| NNF          | Number of precursor families considered.     | 1      |
+--------------+----------------------------------------------+--------+
| NO           | Decay information flag.                      | 8      |
+--------------+----------------------------------------------+--------+
| NP           | Number of points in a tabulation of y(x)     | all    |
|              | that are contained on the same record.       | but    |
|              |                                              |        |
|              |                                              |       |
+--------------+----------------------------------------------+--------+
|              | Number of Bragg edges.                       | 7      |
+--------------+----------------------------------------------+--------+
|              | Total number of distinct model parameters.   | 30     |
+--------------+----------------------------------------------+--------+
|              | Total number of pairs of numbers in the      | 31,33  |
|              | arrays {E~k~,F~k~}{E*~l~*,F*~l~*}.           |        |
+--------------+----------------------------------------------+--------+
| NPE          | Number of charged-particle penentrabilities. | 2      |
+--------------+----------------------------------------------+--------+
| NPP          | Number of pairs of numbers in the            | 8      |
|              | {E~k~,F~k~} array.                           |        |
+--------------+----------------------------------------------+--------+
| NPS          | Number of non-hard-sphere phase shifts.      | 2      |
+--------------+----------------------------------------------+--------+
| NPSX         | Number of particles distributed by LAW=6.    | 6      |
+--------------+----------------------------------------------+--------+
| NR           | Number of different interpolation intervals  | all    |
|              | in a tabulation of y(x) that are contained   |        |
|              | in the same record.                          |        |
+--------------+----------------------------------------------+--------+
| NRB          | Number of resonances in block.               | 32     |
+--------------+----------------------------------------------+--------+
| NRM          | Number of interpolation intervals for        | 6      |
|              | emission cosine for LAW=7.                   |        |
+--------------+----------------------------------------------+--------+
| NRO          | Energy dependence of the scattering radius.  | 2,32   |
+--------------+----------------------------------------------+--------+
| NRP          | Number of interpolation intervals for        | 6      |
|              | emission energy (LAW=7).                     |        |
+--------------+----------------------------------------------+--------+
| NRS          | Number of resolved resonances for a given    | 2,32   |
|              | *l*-state.                                   |        |
+--------------+----------------------------------------------+--------+
| NRT          | Total number of resonances.                  | 2      |
+--------------+----------------------------------------------+--------+
| NS           | Number of non-principle scattering atom      | 7      |
|              | types.                                       |        |
+--------------+----------------------------------------------+--------+
|              | Number of states of the radioactive reaction | 8,9,10 |
|              | product.                                     |        |
+--------------+----------------------------------------------+--------+
|              | Number of levels below the present one,      | 12     |
|              | including ground state.                      |        |
+--------------+----------------------------------------------+--------+
| NSG          | Number of spin groups.                       | 2      |
+--------------+----------------------------------------------+--------+
| NSP          | Total number of spectra radiation types      | 8      |
|              | (STYP) given.                                |        |
+--------------+----------------------------------------------+--------+
| NSRS         | Number of subsections for covariances among  | 32     |
|              | parameters of specific resonances.           |        |
+--------------+----------------------------------------------+--------+
| NSS          | Number of different s-values.                | 2      |
+--------------+----------------------------------------------+--------+
|              | Number of subshells.                         | 28     |
+--------------+----------------------------------------------+--------+
| NST          | Number of statistically parameterized        | 2      |
|              | background R-matrix elements.                |        |
+--------------+----------------------------------------------+--------+
| NSUB         | Sub-library number.                          | 1      |
+--------------+----------------------------------------------+--------+
| NT           | Number of transitions for which data given.  | 2      |
+--------------+----------------------------------------------+--------+
|              | Number of entries for each discrete energy   | 8      |
|              | ER.                                          |        |
+--------------+----------------------------------------------+--------+
|              | Total number of items in LIST.               | 33     |
|              |                                              | ,34,35 |
+--------------+----------------------------------------------+--------+
| NTP          | Control flag for background-R-matrix or      | 2      |
|              | penetrability list.                          |        |
+--------------+----------------------------------------------+--------+
| NTR          | Number of transitions.                       | 28     |
+--------------+----------------------------------------------+--------+
| NVER         | Library version number.                      | 1      |
+--------------+----------------------------------------------+--------+
| NVS          | Number of covariance elements for a block of | 32     |
|              | resonances.                                  |        |
+--------------+----------------------------------------------+--------+
| NW           | Number of words in LIST record.              | 6      |
+--------------+----------------------------------------------+--------+
| NWD          | Number of elements in the text section.      | 1      |
+--------------+----------------------------------------------+--------+
| NX           | Number of sets of background constants to be | 2      |
|              | given.                                       |        |
+--------------+----------------------------------------------+--------+
| NXC          | Number of the sections to be found in the    | 1      |
|              | dictionary                                   |        |
+--------------+----------------------------------------------+--------+
| P~j~(E)      | Probability or weight given to j^th^ partial | 15     |
|              | distribution, g~j~(E~γ~←E).                  |        |
+--------------+----------------------------------------------+--------+
| P~k~(E~N~)   | Fractional part of cross section that can be | 5      |
|              | described by the k^th^ partial distribution  |        |
|              | of the n^th^ incident-energy point.          |        |
+--------------+----------------------------------------------+--------+
| p(μ,E)       | $$\frac{2\pi}{\sigma_{s}(E                   | 4      |
|              | )}\frac{d\sigma}{d\Omega}(\Omega\text{,E})$$ |        |
+--------------+----------------------------------------------+--------+
| PAR          | Parity π of target nuclide.                  | 8      |
+--------------+----------------------------------------------+--------+
| PCP(E)       | Charged-particle penetrability.              | 2      |
+--------------+----------------------------------------------+--------+
| PMT          | Floating point value for PMT.                | 2      |
+--------------+----------------------------------------------+--------+
| PS(E)        | Complex phase shift.                         | 2      |
+--------------+----------------------------------------------+--------+
| Q            | Reaction Q-value (eV); Q=(rest mass of       | 3,9,10 |
|              | initial state - rest mass of final state).   |        |
+--------------+----------------------------------------------+--------+
|              | Total decay energy (eV) available in         | 8      |
|              | corresponding decay process, not necessarily |        |
|              | the same as maximum energy of emitted        |        |
|              | radiation).                                  |        |
+--------------+----------------------------------------------+--------+
| QI           | Reaction Q-value.                            | 3,9,10 |
+--------------+----------------------------------------------+--------+
| QM           | Mass-difference Q-value.                     | 3,9,10 |
+--------------+----------------------------------------------+--------+
| QRE1...QRE4  | Q-values.                                    | 2      |
+--------------+----------------------------------------------+--------+
| QX           | Effective Q-value for the competitive width. | 2,32   |
+--------------+----------------------------------------------+--------+
| R~mjα~       | Probability of de-excitation.                | 11     |
+--------------+----------------------------------------------+--------+
| R0,R1,R2     | Logarithmic parameters for a R-matrix        | 2      |
|              | element.                                     |        |
+--------------+----------------------------------------------+--------+
| R0(E)        | Complex background R-function.               | 2      |
+--------------+----------------------------------------------+--------+
| RCOV         | Relative covariance of model parameters.     | 30     |
+--------------+----------------------------------------------+--------+
| RDATE        | Date and number of last revision.            | 1      |
+--------------+----------------------------------------------+--------+
| REF          | Reference to evaluation.                     | 1      |
+--------------+----------------------------------------------+--------+
| RFS          | Isomeric state flag for daughter nuclide.    | 8      |
+--------------+----------------------------------------------+--------+
| RI           | Resonance index.                             | 2      |
+--------------+----------------------------------------------+--------+
|              | Intensity of radiation produced (relative    | 8      |
|              | units).                                      |        |
+--------------+----------------------------------------------+--------+
| RICC         | Total internal conversion coefficient.       | 8      |
+--------------+----------------------------------------------+--------+
| RICK         | K-shell internal conversion coefficient.     | 8      |
+--------------+----------------------------------------------+--------+
| RICL         | L-shell internal conversion coefficient.     | 8      |
+--------------+----------------------------------------------+--------+
| RIN          | Statistical R-matrix parameters.             | 2      |
+--------------+----------------------------------------------+--------+
| RIS          | Internal pair formation coefficient          | 8      |
|              | (STYP=0.0); positron intensity (STYP=2.0).   |        |
+--------------+----------------------------------------------+--------+
| RNPM         | Number of particular sections (MT\'s).       | 2      |
+--------------+----------------------------------------------+--------+
| RNSM         | Number of summed sections (MT\'s).           | 2      |
+--------------+----------------------------------------------+--------+
| RP           | Spectrum of the continuum component of the   | 8      |
|              | radiation                                    |        |
|              |                                              |        |
|              | ∫ RP(E)dE=1.                                 |        |
+--------------+----------------------------------------------+--------+
| RPB          | Real part of background R-matrix element.    | 2      |
+--------------+----------------------------------------------+--------+
| RPS          | Real part of a non-hard-sphere phase shift.  | 2      |
+--------------+----------------------------------------------+--------+
| RPS(E)       | Real part of PS(E).                          | 2      |
+--------------+----------------------------------------------+--------+
| RR0(E)       | Real part of R0(E).                          | 2      |
+--------------+----------------------------------------------+--------+
| RTYP         | Mode of decay of the nuclide in its LISO     | 8      |
|              | state.                                       |        |
+--------------+----------------------------------------------+--------+
| RV~ij~       | Relative covariance quantities among average | 32     |
|              | unresolved parameters.                       |        |
+--------------+----------------------------------------------+--------+
| S(α,β,T)     | Defined (for a moderating molecule) by the   | 7      |
|              | relation.                                    |        |
|              |                                              |        |
|              | ![](media/image1.wmf)                        |        |
+--------------+----------------------------------------------+--------+
| S0, S1       | Logarithmic parameters for an R-matrix       | 2      |
|              | element.                                     |        |
+--------------+----------------------------------------------+--------+
| SF           | Statistical R-matrix parameter.              | 2      |
+--------------+----------------------------------------------+--------+
| SMT          | Floating-point value for MT.                 | 2      |
+--------------+----------------------------------------------+--------+
| SPD          | Spin and parity for the daughter nucleus.    | 2      |
+--------------+----------------------------------------------+--------+
| SPI          | Nuclear spin of the target nucleus, I        | 2,8,32 |
|              | (positive number).                           |        |
+--------------+----------------------------------------------+--------+
| SPP          | Spin and parity.                             | 2      |
+--------------+----------------------------------------------+--------+
| STA          | Target stability flag.                       | 1      |
+--------------+----------------------------------------------+--------+
| STYP         | Decay radiation type (defined in 8.3).       | 8      |
+--------------+----------------------------------------------+--------+
| SUBI         | Subshell designator.                         | 28     |
+--------------+----------------------------------------------+--------+
| SUBJ         | Secondary subshell designator                | 28     |
+--------------+----------------------------------------------+--------+
| SUBK         | Tertiary subshell designator.                | 28     |
+--------------+----------------------------------------------+--------+
| T            | Temperature (K) at which temperature         | 4      |
|              | dependent data given.                        | ,5,6,7 |
+--------------+----------------------------------------------+--------+
| T~1/2~       | Half-life of the original nuclide (seconds). | 8      |
+--------------+----------------------------------------------+--------+
| TAB1         | Control record for one-dimensional tabulated | all    |
|              | functions.                                   |        |
+--------------+----------------------------------------------+--------+
| TAB2         | Control record for two-dimensional tabulated | all    |
|              | functions.                                   |        |
+--------------+----------------------------------------------+--------+
| TEMP         | Target temperature.                          | 1      |
+--------------+----------------------------------------------+--------+
| TM           | Maximum temperature parameters.              | 5      |
+--------------+----------------------------------------------+--------+
| TP~i~        | Probability of a direct transition from      | 12     |
|              | level NS to level I, I = 0, 1, 2, ...(NS-1). |        |
+--------------+----------------------------------------------+--------+
| TYPE         | Indicates the type of transition for beta    | 8      |
|              | and electron capture.                        |        |
+--------------+----------------------------------------------+--------+
| U            | Defines the upper energy limit for the       | 5      |
|              | secondary neutron, so that 0 ≤E′≤E-U (given  |        |
|              | in the Lab system).                          |        |
+--------------+----------------------------------------------+--------+
| V~k~         | Matrix elements of the transformation        | 4      |
|              | matrices.                                    |        |
+--------------+----------------------------------------------+--------+
| V~mn~        | Variance-covariance matrix element among     | 32     |
|              | resonance parameters.                        |        |
+--------------+----------------------------------------------+--------+
| WEI          | Weight of the standard cross section at a    | 31,33  |
|              | given EI relative to the next given energy.  |        |
+--------------+----------------------------------------------+--------+
| x            | E′/θ(E).                                     | 5      |
+--------------+----------------------------------------------+--------+
| x(n)         | n^th^ value of x.                            | 0      |
+--------------+----------------------------------------------+--------+
| XLFS1        | Floating-point form of final excited state   | 33,40  |
|              | number references for covariance data.       |        |
+--------------+----------------------------------------------+--------+
| XLFSS        | Floating-point form of LFSS, final excited   | 31,33  |
|              | state number of a reaction with a standard   |        |
|              | cross section                                |        |
+--------------+----------------------------------------------+--------+
| XMF1         | Floating-point form of file number reference | 33,40  |
|              | for covariance data.                         |        |
+--------------+----------------------------------------------+--------+
| XMFS         | Floating-point form of MFS, file number in   | 31,33  |
|              | which pertinent standard cross section (MTS) |        |
|              | may be found.                                |        |
+--------------+----------------------------------------------+--------+
| XMTI         | Floating-point equivalent of MT number of    | 31,33  |
|              | the reaction for which the cross section     |        |
|              | contributes to a \"derived\" cross section.  |        |
+--------------+----------------------------------------------+--------+
| y(E)         | Yield for particle described.                | 26     |
+--------------+----------------------------------------------+--------+
| y(n)         | n^th^ value of y.                            | 0      |
+--------------+----------------------------------------------+--------+
| y~i~(E)      | Product yield or multiplicity.               | 6      |
+--------------+----------------------------------------------+--------+
| Y(E)         | Total multiplicity at energy E(eV); given as | 9,12   |
|              | energy-multiplicity pairs.                   |        |
+--------------+----------------------------------------------+--------+
|              | Partial multiplicity at energy E(eV).        | 12     |
+--------------+----------------------------------------------+--------+
| YC           | Cumulative yield for a particular fission    | 8      |
|              | product.                                     |        |
+--------------+----------------------------------------------+--------+
| YI           | Fractional independent yield for a           | 8      |
|              | particular fission product.                  |        |
+--------------+----------------------------------------------+--------+
| ZA           | Designation of the original nuclide.^\*^[^2] | all    |
+--------------+----------------------------------------------+--------+
| ZAI          | (Z,A) designation for an isotope.^\*\*^      | 2,32   |
+--------------+----------------------------------------------+--------+
| ZAFP         | (Z,A) identifier for a particular fission    | 8      |
|              | product.^\*\*^                               |        |
+--------------+----------------------------------------------+--------+
| ZAN          | (Z,A) designation of the next nuclide in the | 8      |
|              | chain.^\*\*^                                 |        |
+--------------+----------------------------------------------+--------+
| ZAP          | (Z,A) designation of the product             | 8      |
|              | nuclide.^\*\*^                               |        |
+--------------+----------------------------------------------+--------+
| ZSYMA        | Test representation of material: Z-chemical  | 8      |
|              | symbol-A                                     |        |
+--------------+----------------------------------------------+--------+
| ZSYMAM       | Text representation of material Z-chemical   | 1      |
|              | symbol-A-state.                              |        |
+--------------+----------------------------------------------+--------+
| α            | Momentum transfer,![](media/image2.wmf).     | 7      |
+--------------+----------------------------------------------+--------+
| β            | Energy transfer, β = (E′ - E)/kT.            | 7      |
+--------------+----------------------------------------------+--------+
| δ(E~γ~ -     | Delta function, with ε~j~, ε~i~ being energy | 11     |
| ε~j~ + ε~i~) | levels of the residual nucleus.              |        |
+--------------+----------------------------------------------+--------+
| Δ            | Uncertainty in quantity.                     | 1,8    |
+--------------+----------------------------------------------+--------+
| λ~i~         | Decay constant (sec^-1^) for the i^th^       | 1      |
|              | precursor.                                   |        |
+--------------+----------------------------------------------+--------+
| θ            | Parameter describing secondary energy        | 5      |
|              | distribution; definition of θ depends on the |        |
|              | energy distribution law (LF).                |        |
+--------------+----------------------------------------------+--------+
| $\overl      | Total average number of neutrons formed per  | 1      |
| ine{\nu}$(E) | fission event.                               |        |
+--------------+----------------------------------------------+--------+
| σ(E)         | Cross section (barns) for a particular       | 3      |
|              | reaction type at incident energy point, E,   | ,10,23 |
|              | in (eV).                                     |        |
+--------------+----------------------------------------------+--------+
| σ~bn~        | Bound atom scattering cross section of n^th^ | 7      |
|              | type atom,                                   |        |
|              |                                              |        |
|              | $\                                           |        |
|              | sigma_{\text{bn}} = \sigma_{\text{fn}}\left( |        |
|              |  \frac{A_{n}\text{ + 1}}{A_{n}} \right)^{2}$ |        |
+--------------+----------------------------------------------+--------+
| σ~fn~        | Free atom scattering cross section of n^th^  | 7      |
|              | type atom.                                   |        |
+--------------+----------------------------------------------+--------+
| σ~k~^γ^(E)   | Photon production cross section for a        | 13     |
|              | discrete photon or photon continuum          |        |
|              | specified by k.                              |        |
+--------------+----------------------------------------------+--------+
| σ~m0~(E)     | Neutron cross section for exciting m~o~^th^  | 11     |
|              | level with neutron energy E.                 |        |
+--------------+----------------------------------------------+--------+
| σ~s~(E)      | Scattering cross sections, *e.g*., elastic   | 4      |
|              | scattering at energy E as given in File 3    |        |
|              | for the particular reaction type (MT).       |        |
+--------------+----------------------------------------------+--------+
| σ~T~         | $$\frac{C}{\                                 | 2      |
| (background) | sqrt{E}}(\text{AT}_{1}\text{ + }\text{AT}_{2 |        |
|              | }\text{ /E + }A_{3}\text{ /}E^{2}\text{ + }\ |        |
|              | text{AT}_{4}\text{ /}E^{3}\text{ + }\text{BT |        |
|              | }_{1}\text{*E + }\text{BT}_{2} \ast E^{2})$$ |        |
+--------------+----------------------------------------------+--------+
| σ~W~         | Wick\'s limit cross section in units of      | 4      |
|              | barns/steradian.                             |        |
+--------------+----------------------------------------------+--------+
| $$\frac{d    | Differential scattering cross section in     | 4      |
| \sigma(\Omeg | units of barns/steradian.                    |        |
| a\text{,E }) |                                              |        |
| }{d\Omega}$$ |                                              |        |
+--------------+----------------------------------------------+--------+
| $$\f         | Differential photon production cross section | 14     |
| rac{d\sigma_ | in barns/steradian.                          |        |
| {k}^{\gamma} |                                              |        |
| }{d\Omega}$$ |                                              |        |
+--------------+----------------------------------------------+--------+
| µ            | Cosine of scattered angle in either          | 4,6,14 |
|              | laboratory or center-of-mass system.         |        |
+--------------+----------------------------------------------+--------+

[^1]: \* The subscript r denotes the r^th^ resonance.

[^2]: \*^\*^ (ZA=(1000.0\*Z) + A).