Japan Charged-Particle Nuclear Reaction Data Group
Division of Physics, Graduate School of Science
Hokkaido University
060-0810 Sapporo, JAPAN

Telephone +81(JPN)-11-706-2684
Facsimile +81(JPN)-11-706-4850
E-mail nrdf@nucl.sci.hokudai.ac.jp

Memo CP-E/020
Date:
To:
From:
Subject:

April 19, 2003
Distribution
OTUKA Naohiko and KATŌ Kiyoshi
Total spin transfer

Recently we received experimental data of “total spin transfer” (A.Tamii et al., Phys. Lett.
B459 (1999) 61, T.Kawabata et al., Phys.Rev. C65 (2002) 064316). This quantity is defined asfollows:Σ = {3-(DSS+DNN+DLL)}/4=(SSS+SNN+SLL)/2,where Dii (ii=SS, NN, LL) are “spin-rotation-deporalization parameters”, and Sii = (1-Dii)/2(ii=SS, NN and LL) is spin-flip probability for the i -direction, respectively.
Total spin transfer Σ is used as an index to distinguish spin-flip (∆S=1) and non-spin-flip(∆S=0) excitation. Σ≈1 (0) for ∆S=1(0) is regarded as a good approximation at forward angles ofoutgoing particle. At 0 degree, especially, this relation is exactly correct due to the spatialsymmetry. In this sense, total spin transfer Σ is similar to “spin-flip probability” SNN, for which
also SNN ≈0 for ∆S=0. However, SNN takes various values in ∆S=1 excitations depending on theJπ. Therefore Σ is considered as a better index than SNN.
A rule of “DSS+DNN+DLL =3(-1) for ∆S=0(1)” had been known in the measurements of (p,n)
scattering. H.Sakai pointed out that this rule is effective to distinguish ∆S=1 and 0 excitations
and introduced Σ in 1999 (H.Sakai, Nucl. Phys. A654 (1999) 731c). The validity of Σ as anindex of ∆S=0(1) is theoretically confirmed (T.Suzuki, Prog. Theor. Phys. 103 (2000) 859). Dueto the recent progress of experimental technique (high luminosity beam, reliable measurement offorward scattered particle), DSS and DLL are widely measured as well as DNN , and consequently Σis recognized as an experimental observable. We propose some codes for total spin transfer :Dictionary 24 (Modifiers)
TST
Dictionary 36 (Quantities),POL/DA/DE,,TST NO
PAR,DA,,TSTDA
Related two proposals:

Total spin transfer

Total spin transfer with respect to angle and energy
Partial diff. cross section d/dA *total spin transfer

1. “NN,POL/DA,,SF” and “,POL/DA,,SF”
Now we have two codes “NN,POL/DA,,SF” and “,POL/DA,,SF” for “spin-flip
probability SNN”. We propose that we keep “NN,POL/DA,,SF” while obsolete“,POL/DA,,SF” (we cannot find any entry which use the latter quantity code in
EXFOR+CINDA Ver.1.10).
Dictionary 36 (Quantities),POL/DA,,SFNO

Spin-flip probability S(nn)(obsolete, use “NN,POL/DA,,SF”)

2. “,SIG,,SF”Now “,SIG,,SF“ is expanded as “spin-flip cross section” in our dictionary (we cannot
find any entry which use this quantity code in EXFOR+CINDA Ver.1.10). But the definition ofthis quantity is ambiguous. If this quantity means “cross section multiplied by SNN (spin-flipprobability)”, it is better to use “NN,SIG,,SF” with a corrected expansion.
Dictionary 36 (Quantities)
B,SIG,,SF
NN,SIG,,SF

B

Spin-flip cross section(obsolete, use “NN,SIG,,SF”)
Cross section * Spin-flip probability S(nn)

We attach a coding sample for the proposed two new quantities “,POL/DA/E,,TST” and“PAR,DA,,TST”.

Distribution:
J.H. Chang, KAERIO. Gritzay, KINR
M. Lammer, NDS
P. Oblozinsky, NNDC
O. Schwerer, NDS
M. Vlasov, KINR

M. Chiba, JCPRG
A. Hasegawa, JAERIS. Maev, CJD
Y. Ohbayasi, JCPRG
S. Takacs, ATOMKI
M. Wirtz, NDS

F.E. Chukreev, CAJaD
K. Kato, JCPRG
V.N. Manokhin, CJD
N. Otuka, JCPRG
F.T. Tárkányi, ATOMKI1
V. Zerkin, NDS

Sample of coded entry (E1776.004, 027):
T. Kawabata et al., Phys. Rev. C 65 (2002) 064316 Fig.4 and Table II

S. Dunaeva, Sarov
M. Kellett, NEADB
V. McLane, NNDC
V. Pronyaev, NDS
V. Varlamov, CDFE
Y.X. Zhuang, CNDCSUBENTBIB
REACTION…
ENDBIB
COMMON
ANG
ADEG
0.0
ENDCOMMON
DATA
E-EXC
MEV
5.61
5.856
…
28.79629.043ENDDATAENDSUBENTSUBENT
BIB
REACTION…
ENDBIB
COMMON
E-LVL
MEV
8.87
ENDCOMMONDATA
ANG-CM
ADEG
4.4
ENDDATAENDSUBENTE1776004
20030311
48(8-O-16(P,INL)8-O-16,,POL/DA/DE,,TST)
DATA: total spin transfer
810333096

DATA
NO-DIM-2.768-1.308DATA-ERR
NO-DIM
2.975
1.971

0.406
0.507

0.062
0.064

9801150E1776027
20030311
58(8-O-16(P,INL)8-O-16,PAR,DA,TST)
DATA: spin flip cross section(=angular distribution *total spin transfer)
8103

3301

DATA
MU-B/SR
19.0

DATA-ERR
MU-B/SR
2.0
3
20

00

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