Memo CP-D/332
28 January 2002
From:

O. Schwerer

To:

Distribution

Subject:

Quantities, Units and LEXFOR pages for Product Yields and ThickTarget Yields

1.

ProblemSome clarifications, additions and corrections are needed concerning the quantities and units
for product yields and thick target yields, affecting the dictionaries and relevant LEXFOR
pages. Starting point of my review was entry D4063 of TRANS D023 where the REACTION
quantity as transmitted does not match the units, which was discussed in several e-mails
between NDS and NNDC in last November.
Subentry D4063003:REACTION(52-TE-122(D,N)53-I-123,,PY,,,EXP)
Units: MBQ/MUAHR
These units do not match the REACTION. SF6 = PY (with blank SF8) requires units of type
YLD such as PRT/INC or PRD/INC.
Other REACTIONS proposed by NNDC for this subentry were PY,,TT and TTY,,DT.
However, I believe now that the correct REACTION coding might be PY,,DT though I haveno clear definition of this quantity (see below).
It is difficult to find the correct coding for such quantities because of shortcomings in both
the dictionaries and LEXFOR.
Distribution:dunford@bnlnd2.dne.bnl.gov
oblozinsky@bnl.gov
mclane@bnlnd2.dne.bnl.gov
nordborg@nea.fr
kellett@nea.fr
manokhin@ippe.obninsk.ru
maev@ippe.obninsk.ru
may@obninsk.ru
feliks@polyn.kiae.su
chukreev@polyn.kiae.su
dunaeva@expd.vniief.ru
taova@expd.vniief.ru
varlamov@cdfe.npi.msu.su
chiba@earth.sgu.ac.jp
kato@nucl.sci.hokudai.ac.jp
oba@nrdf.meme.hokudai.ac.jp

yxzhuang@iris.ciae.ac.cn
cndc@mipsa.ciae.ac.cn
tarkanyi@atomki.hus.takacs@atomki.hu
hasegawa@ndc.tokai.jaeri.go.jp
vlasov@kinr.kiev.ua
kaltchenko@kinr.kiev.ua
ogritzay@kinr.kiev.ua
jhchang@kaeri.re.kr
m.wirtz@iaea.org
m.lammer@iaea.org
v.pronyaev@iaea.org
schwererzerkinThe following is based on the latest transmitted version of the dictionaries (which included the newunits proposed in CP-C/294) and the May 2001 draft version of LEXFOR.

2.

Quantities in the dictionaries and their units

In Daniel/Archive dictionary 36, the class of units that must go with a quantity is defined by the"Unit Family Code" which is used also in Daniel/Archive dictionary 25 to match the appropriate
units. The various Unit Family Codes are collected in Daniel/Archive dictionary 26.
The following table lists the basic quantity types and their units.
Table: Basic types of Product Yields and Thick Target Yields in Dictionary 36
Quantity

Explanation

Unit
FamilyCodeUnits

Remarks,PY and similar(SF8 = blank),PY,,TT and similar(SF8 = TT),PY,,DT and similar(SF8 = DT)

Product Yield

YLD

Definition is missing inLEXFOR

Product Yield forthick target
Product Yield perunit timeYLD

PRD/INC, PRT/INC
and similar
PRD/INC, PRT/INC
and similar
DPS/MUAHR,
MBQ/MUAHR,
MUCI/MUAHR and similar,TTY and similar(SF8 = blank),TTY,,DT and similar(SF8 = DT)

Thick Target Yield

TTY

Thick Target Yield
per unit time

TTT,TTY/DA
and similar

Thick Target Yield
diff.with angle ofoutgoing particle

1/A,TTY/DA,,DT

TTT

MCI/MUA, MUCI/MUA,
PRD/MUAHR
DPS/MUAHR,
MBQ/MUAHR,
MUCI/MUAHR and similar
PRT/INC/SR(Note: Unit Fam.Code 1/A
allows also units
1/SR which is the samedimension)

TTDA (?)?

,TTY/DA/DE
and similar

Double-diff. Thick
Target Yield withrespect to angle andenergy ofoutgoing particle

1/AE

P/IN/MEVSR(Note: Unit Fam.Code 1/AE
allows also units
1/SR/MEV which is the samedimension),TTY/DE(Diff. Thick Target
Yield with respect toenergy of outgoingparticle)(1/E)(PRT/IN/MEV)

Remarks on the table:
2

Missing in LEXFORIs this different from,TTY,,DT ? Theremay be an inconsistency but I have nodefinition.

Inconsistent coding!
Units correspond to"YLD/sr", thereforeshould be coded
as ,PY/DA,,TT
Missing in LEXFOR
Not found in file
To be deleted?
Inconsistent coding!
Units correspond to"YLD/sr/MeV", therefore should be coded
as ,PY/DA/DE,,TT
Missing in LEXFOR
Not found in file
Missing in LEXFOR
To be changed
to ,PY/DE,,TT ?
(Similar case as above)

1)

2)

3.

The Unit Family Codes in dictionary 36 for these quantities are not yet consistent, this is
why the check program CHEX often reports errors which are not real. Appropriate
corrections in the dictionary will be made.
"SF8 = blank" does, of course, not exclude the use of general purpose modifiers such as
REL or MXW.
Clarifications needed for the sake of consistency• Is ,PY,,DT different from ,TTY,,DT ?
(There is a number of subentries in the file, with units of TTT type.)
If there is a difference, then the distinction of PY-related quantities (Unit Family Code YLD)
and TTY-related quantities (Unit Family Codes TTY, TTT) only by their dimension is not kept,
and a clear explanation in LEXFOR, when to use PY and when to use TTY, is needed.
If there is no difference, ,PY,,DT should be made obsolete and the corresponding subentries
changed to TTY,,DT.

• TTY/DA and TTY/DA/DE: Do we agree to change these quantities to ,PY/DA,,TTand ,PY/DA/DE,,TT ? (In particular if it is decided that ,PY,,DT should be removed, thiswould restore full consistency.) The same applies to TTY/DE if there are such entries.

4.

Proposed changes in LEXFOR

Part of the following proposals were included already in my comments on the draft LEXFOR
manual which I sent to Vicki McLane on 19 June 2001.

4.1

LEXFOR Page "Product Yields"

The title of this page is misleading. It does not define the quantity "Product yield" (SF6 =PY), andnone of the coding examples is a product yield.
Actually this page explains the use of the SF5 codes CUM, IND, M+, (CUM), M-, (M), which canbe used for cross sections as well as for fission-, thick target- and product yields.
I propose to rename this page to "Cumulative and Independent data".
It may be useful having also a page "Independent data" containing only a cross-reference to thepage "Cumulative and Independent data".
4.2

LEXFOR Page "Production Cross Sections"This is a completely different topic, one of the main issues being the difference between "emission"and "production" cross sections.
I propose to rename this page to "Production vs. Emission Cross Sections".
It may be useful having also a page "Emission Cross Sections" containing only a cross-reference tothe page "Production vs. Emission Cross Sections".

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4.3

New LEXFOR Page "Product Yields"

I propose to write a new LEXFOR page "Product Yields" with different contents from the old one.
It should contain:• Definition of Product Yields (SF6=PY) explaining also the difference to thick-target yields• Definition of PY,,TT• Definition of PY,,DT (unless it is decided that this quantity should be canceled)
All definitions with coding examples and required unit types.
If it is agreed that the quantities now compiled as TTY/DA and TTY/DA/DE should be compiledusing PY in SF6 and TT in SF8, those quantities should also be included here. The same applies toTTY/DE if this is needed.
Cross references to the LEXFOR pages "Thick Target Yields", "Cumulative and Independent Data",and (perhaps) "Production vs. Emission Cross Sections" should be included.
4.4

LEXFOR page "Thick Target Yields"

Typographical error: In the formula, in several places E must be replaced by E'.
The definition should explicitly state the difference between Thick Target Yield and Product Yield.
Section 4 on Thick-target product yields: should be moved to the new proposed page on "ProductYields". "tt" should read "TT". Units NUC/PART are now obsolete, replace by new units.
If the quantities TTY/DA and TTY/DA/DE are kept, their definitions, along with coding examples,must be added here.
Cross-reference to the new page "Product Yields" is needed.

5.

Proposed changes in dictionaries

Dictionary 36 (Unit Family Codes apply only to Archive/Daniel dictionary):• Change everywhere Unit Family Code PY (superseded) to YLD.
• Quantities PY,,DT and similar (if not made obsolete): Change Unit Family Code to TTT• Quantities with SF6 = TTY/DA: Change Unit Family Code to 1/A; if approved, change SF6 toPY/DA and add TT to SF8.
• Quantities with SF6=TTY/DA/DE: if approved, change SF6 to PY/DA/DE and add TT to SF8.
• TTY/DE: Not found in master file. If needed, may need to be changed to PY/DE,,TT.
• Delete ,TTY/DA,,DT (not in master file, unclear definition, no appropriate units indictionary 25).

4

Archive/Daniel Dictionary 26:

••
•
•
6.

Delete PY
Add YLD
Swap explanations for TTT and TTY
Delete TTD (not used anywhere)

Required corrections of EXFOR entries• If it is decided to replace PY,,DT by TTY,,DT: Correct REACTIONs in entries B0167 andB0175.

• If it is decided to replace TTY/DA and TTY/DA/DE by PY/DA,,TT and PY/DA/DE,,TT
respectively: Correct REACTIONs in entries A0388, C0108, C0118, M0036, A0527, O0100(subentries 34 -53).

• D0463.003: Change REACTION to either PY,,DT or TTY,,DT depending on decision onitem 3.

5