MEMO 4C - 4 / 95-----------------------Centr Jadernykh Dannykh- CJD

Institute of Physics and PowerEngeneering - IPPE

Nuclear Data Centre, Obninsk,
Russia249020 Obninsk, Kaluga region
RussiaDATE : 28 June 1999
To:Distribution

From: S.Maev (alias: S. Mayev, S.Maiev)
Subjects:

Additions to LEXFOR Manual for the codes proposed
by Area-4 Center - CJD (Conclusion C16 of 1999 NRDC Meeting)

For codes proposed after 1998 AGM in Vienna and approved during 1999 NRDC
meeting the following LEXFOR Manual Entries are submitted. See WP8 of the 1999
NRDC Meeting.

Distribution:
DUNFORD@BNLND2.DNE.BNL.GOV
MCLANE@NNDC.BNL.GOVNORDBORG@NEA.FR
KELLET@NEA.FR
MANOKHIN@IPPE.RSSI.RU
MAEV@IPPE.RSSI.RU
CBETA@CAJAD.KIAE.SU
DUNAEVA@EXPD.VNIIEF.RU
VARLAMOV@CDFE.NPI.MSU.SU
SCHWERER@IAEAND.IAEA.OR.AT
PRONYAEV@IAEAND.IAEA.OR.AT
CHIBA@EARTH.SGU.AC.JP
KATO@NUCL.SCI.HOKUDAI.AC.JPTENDOW@POSTMAN.RIKEN.GO.JP
YXZHUANG@MIPSA.CIAE.AC.CN
CNDC@MIPSA.CIAE.AC.CN
TONG@MIPSA.CIAE.AC.CN
TARKANYI@ATOMKI.HUHASEGAWA@CRACKER.TOKAI.JAERI.GO.JP

Lammer@iaeand.iaea.or.at
Stanislav Maev
Clearance: Vassily N. Manokhin.

1MEMO 4C - 4 / 95

2Item 1. Entry to be added to FISSION NEUTRON SPECTRA chapter:
4. Average number of prompt neutrons emitted by Fission Fragment of a given mass.
Independent variables-ELEMENT and/or MASS and/or ISOMER. Incident particle energy (forinduced fission). Units - NO-DIM, ARB-UNITS.
Example:SUBENT
BIB
REACTION

40420002 YYYYMMDD..
..
(98-CF-252(0,F)MASS,PR,NU,FF) AVERAGED NUMBER OF
PROMPT NEUTRONS EMITTED BY A FRAGMENT OF DEFINITE
MASS
...

ENDBIBNOCOMMON
DATA
3MASS
DATA
ERR-S
NO-DIM
NO-DIM
NO-DIM
79.5
0.615
0.011
ENDDATA...............................................................

..

5. Average number of prompt neutrons emitted by Fission Fragment of a given mass andenergy.
Independent variables-ELEMENT and/or MASS and/or ISOMER, secondary energy,
Incident particle energy (for induced fission). Units class 1/E. Or NO-DIM, ARB-UNITS.
Example:SUBENT
BIB
REACTION
ENDBIBNOCOMMONDATA
MASS-MIN
NO-DIM
120.
ENDDATA

40420003 YYYYMMDD..
..
(98-CF-252(0,F)MASS,PR,NU/DE,FF,REL) AVERAGEDNUMBER OF PROMPT NEUTRONS EMITTED BY A FRAGMENT OF
DEFINITE MASS AND ENERGY...
5MASS-MAX
NO-DIM
121.5..
EMEV
127.5

DATA
ARB-UNITS
1.4

ERR-S
PER-CENT
29.

2

MEMO 4C - 4 / 95

3Item 2. Entry to be added to FISSION YIELDS chapter:
11. Energy spectrum of Fission Fragments. Energy spectrum measured simultaneouslywith fission yield, mainly of primary fragments.
REACTION SF6 Code: FY/DE
Independent variables - ELEMENT/MASS/ISOMER, secondary energy, incident particle
energy for induced fission. Unit class - FY/E. Or ARB-UNITS.
Example:SUBENT
40420062
YYYYMMDD
BIB
REACTION (98-CF-252(0,F)MASS,PRE,FY/DE,,REL)
ENDBIBNOCOMMONDATA
MASSNO-DIM
...

E
MEV
...

DATA
ARB-UNITS
...

ERR-S
PER-CENT...

SUBENT
40194004
YYYYMMDD
BIB
11
REACTION (94-PU-242(N,F)MASS,PRE,FY/DE)
ENDBIB
1COMMON
13EN
MEV
3.0
ENDCOMMON
DATA
4MASS
E
DATA
ERR-S
NO-DIM
MEV
PC/FIS/MEV PER-CENT
...
...
...
...

3MEMO 4C - 4 / 954Item 3. Entry to be added to FITTING COEFFICIENTS chapter:
Legendre Coefficients for Double-Differential Cross-Sections
Definition: Coefficients obtained by fitting of a double-differential cross-section using
an equation containing a sum of Legendre polynomials.
REACTION Coding: DA/DE in SF6, LEG in SF8 plus a code indicating the exact
representation used.

Representation:
DA/DE,,LEG/RSL = A l(units NO-DIM), wherend 2σσ E, E ', ϑ ) =+12l + 1)A l ( E , E ')Pl (cos ϑ )((∑dEdΩ
4 π  l =1


Example: Legendre Coefficients for double-differential neutron emission cross-section
SUBENT
BIB
REACTION
ENDBIBNOCOMMON
DATA
EN
MEV
...
ENDDATAENDSUBENTCEEEESSSYYYYMMDD(....(N,X)0-NN-1,EM,DA/DE,,LEG/RSL)
5E
MEV
...

NUMBER
NO-DIM...

DATA
NO-DIM...

ERR-T
NO-DIM...

4