Japan Charged-Particle Nuclear Reaction Data Group
Division of Physics, Graduate School of Science
Hokkaido University
060-0810 Sapporo, JAPANE-mail: services@jcprg.org
Internet: http://www.jcprg.org/Telephone
Facsimile+81(JPN)-11-706-2684+81(JPN)-11-706-4850

Memo CP-E/100
Date:
To:
From:
Subject:

September 22, 2006
Distribution
OTSUKA Naohiko
Clarification of spin observables (1)As the first step of clarification of spin observables (according to the Action 26 of the 2005
NRDC meeting), I checked all EXFOR entries for spin correlations and polarization transfers, i.e.
kq (k, q=S, N or L) in SF5 (branch), and D, C or K in SF8 (modifier). Checking for tensor
polarization (e.g. Ayy, iT11, …) will be made in future.
Three major problems are detected as explained below. The first item proposes the change ofthe present rule (change of expansion of modifier C). The second and third items are
confirmation of the present rule and no change is proposed to the present rule. If my proposal isapproved at the 2006 NRDC meeting, I will prepare a memo for improvement of our dictionary.
→→“LEXFOR” refers LEXFOR version January 2006 through this memo. A and b I stand for→→polarized target and incoming particle in initial state, respectively. c and D stand for polarizationof outgoing particle and products (=recoils), respectively.
1) Modifier C
Dictionary 236 defines modifier C as “final state spin correlation parameter” (c.f. LEXFOR
P11). However this modifier has been always applied to “initial state spin correlationparameter” in our compilations. I propose that we will use modifier C for initial state spincorrelation parameter in future, so that we can keep entries having C in SF8 without anycorrections. Consequently we lose quantity codes for final state spin correlation parameters(This parameters are rarely measured and there are no entries of this correlation in EXFOR).

→ →Initial state spin correlation parameter A(b,c)D→ →Final state spin correlation parameter A(b,c )D→

Tensor analyzing power in Cartesian coordinate A(b,c)D(This quantity can be defined when spin of beam ≥ 1)

Present rule
kq,POL,,ANA

My proposal
kq,POL,,Ckq,POL,,C(no code)kq,POL,,ANA(conflict!)

kq,POL,,ANA

2) Modifier D and K (Polarization transfer)
Polarization transfer from incoming particle to outgoing particle is often denoted by Kyy’,
Kxz’,... by authors of reference (Ohlsen’s convention, See [1972Oh] in LEXFOR P.15).
Therefore some entries use modifier K for this transfer. However they should be coded withmodifier D according to our rule, e.g. NN,,POL,,D for Kyy’, and SL,,POL,,D… for Kxz’ .
Modifier K is kept for polarization transfer from incoming particle to product as before.

3) Order of two indices in polarization transfer DIn our rule, k and q (k, q=S, N or L) in SF5 should be spin direction of incoming particle(SF2) and outgoing particle (SF3), respectively, when we use modifier D (polarization transferfrom projectile to outgoing particle). See “Representation” in the image of LEXFOR P.13.
However position of k and q is wrong (illegally swapped) some entries when authors ofreferences use notation like Dq’k.(Dash means spin state in final state). I propose we keep thisrule in future, i.e. the first index refers incoming particle and the second index refers outgoingparticle.

Conclusion from 1), 2) and 3)
SF5(Branch, e.g. SL, LS, …)Initial state spin correlation parameter 1st index: spin state of incoming particle→ →2nd index: spin state of target
A(b,c)D
Final state spin correlation parameter (no code)

SF8(Modifier)
C→ →A(b,c)D
Polarization transfer from projectile to 1st index: spin state of incoming particle
outgoing particle
2nd index: spin state of outgoing particle

D→ →A(b,c)D
Polarization transfer from projectile to 1st index: spin state of incoming particle
product (recoil).
2nd index: spin state of product (recoil)→→A(b,c)DTensor analyzing power in Cartesiancoordinate→KA(b,c)DANAExample:
1-H-1(N,EL)1-H-1,SL,POL/DA,,C
Spin correlation parameter for Sideward component of incoming neutron polarization and→→Longitudinal component of target proton polarization in 1H (n,n0)1H (Both beam and target arepolarized.)
6-C-12(P,N)7-N-12,SL,POL/DA,,D
Polarization transfer from Sideward component of incoming proton polarization to→ →Longitudinal component of outgoing neutron polarization in 12C (p,n)12N (Beam proton ispolarized and polarization of neutron is measured.)
1-H-1(N,EL)1-H-1,SL,POL/DA,,K
Polarization transfer from Sideward component of incoming neutron polarization to→→Longitudinal component of residual (recoil) proton polarization in 1H(n,n0)1H (Beam neutron
is polarized and polarization of residual proton is measured.)

List of entries which have modifier D, C or K in SF8 (as of Sept. 20, 2006)(Original references should be checked by compilers before corrections. “Ok” means nocorrection is required if my proposal (1) is approved.)
ANSAN
Indices (SF5)Modifier (SF8)Remarks
13175
003
Ok
Ok
13563
002
Ok
Ok
13595
002
Ok
Ok
13608
003
Ok
Ok
13610
003
Ok
Ok
13611
002
Ok
Ok
13612
002
Ok
Ok
13617
002-005
Ok
Ok
13619
002-003
Ok
Ok
C0140
004, 007
Ok
Ok
C0144
008,009,012
Ok
Ok
C0434
002-003
Ok
Ok
C0437
002-004
Ok
Ok
C0466
002
Ok
Ok
C0543
002-003
Ok
Should be D
C0558
002
Ok
Should be D
C0567
003,005
Ok
Ok

C0587
C0591
C0592
C0611
C0639
C0640
C0660
C0662
C0676
C0680
C0681
C0682
C0787
C0792
C0805
C0823
C0863
C0864
C0865
C0866
C0880
C0943
C0964
C0975
C0979
C1291
C1327
C1414
C1415
E1315
E1579
E1718
E1726
E1768
E1773
E1783
E1801

010,018,020,022,024
002,003
003
002
002,003003
002-005004-005003-004006-007, 009-010
002-003,005-006,008-009
002-003002-003002-003005-008003-005008-010012-013003-004,006,007-009
003-004004
006-007002-004002-005002
002
004,006-008
004
002
004-008
022-026003-005017-041004-005002
023,025004
004-008

Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Should be swapped
Should be swapped
Should be swapped
See remark
Ok
Should be swapped
Ok
Ok
Ok
Ok
Ok
Ok
Ok?
Ok
Ok
Ok
Should be swapped
Ok
Ok
Ok
Ok
Should be swapped

Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
OkOk
Ok
Should be D
Ok
Ok
Should be D
Ok
Ok
Ok?
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok

111234567

E1807
E1857
E1898
E1900
E1907
E1909
E1912
O0789
O1178
O1218
T0074

005-006003
011,013-016
011-025003
003-005
026,030,034,038002-004002-004002-004
006

Ok
Ok
Should be swapped
Should be swapped
Ok
Ok
Ok
Ok
Ok
Ok
Ok

Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Ok
Should be D

Remark to the table:
1: Kinematical restrictions for quasi-elastic (=quasi-free) scattering peaks are missing.
2: SF3 and SF4 should be X and 0-NN-1 if data are for inclusive measurement of neutrons
3: N in SF7 is redundant and should be deleted.
4: SF5 should be corrected to SS (003), LS (004 #1), LS (004 #2), SL (004 #3), LL (004 #4).
See table II of reference.
5: Negative sign is required for data coded under DATA #2. See Table II of reference.
6: SF3 and SF4 should be X and 1-H-1 if data are for inclusive measurement of protons
7: This reference is not available at JCPRG. Probably this compilation is correct, because- polarized proton is used (see INC-SOURCE in 001)
- outgoing neutron is detected (see DETECTOR in 001)
- “Longitudinal polarization-transfer coefficient” is given (Free text in REACTION)

Distribution:
S. Babykina, CAJaD
S. Dunaeva, IAEA-NDS
H. Henriksson, NEA-DB
Y.O. Lee, KAERI
A. Mengoni IAEA-NDS
Y. Ohbayasi, JCPRG
D. Rochman, NNDC
T. Tárkányi, ATOMKI
H.W. Yu, CNDC

J.H. Chang, KAERI
Z.G. Ge, CNDC
A. Kaltchenko, KINR
S. Maev, CJD
M. Mikhaylyukova, CJD
A. Ohnishi, JCPRG
O. Schwerer, IAEA-NDS
V. Varlamov, CDFE
V. Zerkin, IAEA-NDS

M. Chiba, JCPRG
O. Gritzay, KINR
J. Katakura, JAEA
V.N. Manokhin, CJD
C. Nordborg, NEA-DB
N. Otuka, JCPRG
S. Tákacs, ATOMKI
M. Vlasov, KINR
Y.X. Zhuang, CNDC

F.E. Chukreev, CAJaD
A. Hasegawa, JAEA
K. Katō, JCPRG
V. McLane, NNDC
P. Obložinský, NNDC
V. Pronyaev, CJD
S. Taova, VNIIEF
M. Wirtz, IAEA-NDS
EXFOR, NEA-DB