MEMO CP-A/124
14-Apr-2002
To:Distribution
From:F.E. Chukreev
Subject: Modification of Dictionary 8 and Dictionary 27(Action A10 of last Technical Meeting)
The development experimental technique permits accelerate practically anynucleus. Now our science has possibility to accelerate radioactive projectiles and I
believe, that irradiation radioactive targets by radioactive beams will be possible
after some time. Consequently we will must add numerous corrections in 27-th
Dictionary constantly. To exclude the corrections I propose to refuse from 27-th
Dictionary and to modify 8-th Dictionary.
Let us see Columns 12-26 of the 27-th dictionary. My remarks for
Manual page are shown by red color.
Columns 12-26 have the following structure:
Column 12( Parenthesis
13-23 Each column contains either a flag or blank:
13 used for REACTION SF1 (SF2 0)
Any nuclide can be used as target in suitable accelerator. Therefore the label is notneeded.
1 indicates validity,
X indicates a warning for unusual use.
14 used for REACTION SF2.
Any nuclide can be used as beam in suitable accelerator. Therefore the label is not neededtoo.
2 indicates validity.
15 used for REACTION SF3, REACTION SF4, REACTION SF7, plus otherkeywords which allow nuclide codes8.
Z code is needed only. Subfields SF3 and SF4 can contain any nuclide
3 indicates validity,
V virtual (not yet found)
Z indicates validity except for those cases where the particle codes
are used instead of the corresponding nuclide codes1.
16 used for REACTION SF1 (SF2=0).
1

DECAY-DATA, DECAY-MON, EN-SEC, EMS-SEC, HALF-LIFE, MOM-SEC, PART-DET, RAD-DET

As I understand SF2=0 means radioactive decay. Consequently, any unstable nuclide
must have the label.
But 27-th dictionary has the label for little number of radioactive nuclides and somestable ones (N-15 and O-17, for example). If a label in 23-th column is absent, thenradioactive decay is possible. Therefore the label is not needed too.
4 indicates validity.
17 used to indicate a fission product
If SF3=F, then SF4 is fission product. Therefore the label is not needed too.
F indicates validity.
(18-21 are presently unused)

22 used for CINDA
Is it needed for EXFOR?
C indicates validity,
T indicates validity for theoretical work only.
23 used to indicate a stable isotope. It is needed
S indicates stability.
24-25 isomer field:
The conception of “isomer” was extended in last years. I met isomers with half-life somenanoseconds in literature. Similar isomers can exist in any nuclide practically. Therefore
the label is not needed too.
either blank, indicating that the nuclide has no isomeric states
or a number, right justified, indicating the maximum number ofmetastable states (i.e., number of isomeric states not including theground state).
or A, indicating one or more short-lived isomers (<1 sec.), but nolong-lived isomers.
26)

parenthesis

Conclusion: Only Z and S labels are needed now.
Therefore I would like to propose to use 8-th dictionary with a little modification
only. Let us see one example. Today we have in 8-th Dictionary:
55-CS(Cesium)

We can modify the record:
55-CS(Cesium) [S134, 112-151]
S134 means that 55-CS-134 is stable.
Cesium isotopes with mass 112-151 are known.
Second example:
1-H(Hydrogen)

The record must be modified as
1-H(Hydrogen) [SZ1,SZ2,Z3,1-3].
SZ1 means that 1-H-1 is stable and P must be used in SF2 and SF3. Z3 means thattritium is radioactive nuclide and T must be used in SF2,SF3
Proposed modification of 8-th Dictionary will permit exclude 27-th
Dictionary and numerous corrections of it.

Distribution:
OBLOZINSKY@BNL.GOV
VML@BNL.GOVNORDBORG@NEA.FR
KELLETT@NEA.FR
MANOKHIN@IPPE.RSSI.RU
MAEV@IPPE.RSSI.RU
FELIKS@POLYN.KIAE.SUCHUKREEV@POLYN.KIAE.SU
DUNAEVA@EXPD.VNIIEF.RU
VARLAMOV@depni.NPI.MSU.SU
CHIBA@EARTH.SGU.AC.JPKATO@NUCL.SCI.HOKUDAI.AC.JPTENDOW@POSTMAN.RIKEN.GO.JP
YXZHUANG@IRIS.CIAE.AC.CN
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