Nuclear Data Section
International Atomic Energy Agency
P.O.Box 100, A-1400 Vienna, Austria
Memo CP-D/632
Date:
To:
From:

2 April 2010
Distribution
N. Otsuka, O. Schwerer

Subject:

Resonance parameters in CPND entries

We have been accumulating resonance parameters of compound nucleus formed inneutron-induced reactions in EXFOR. These are usually derived from neutroninduced reactions. In addition, we often see resonance parameters derived frommeasurement of charged-particle induced reactions. They can be divided to thefollowing two types:(1) Resonance parameters of compound nucleus(2) Resonance parameters of residual nucleus
Below are examples of these cases in recent publications:(1) Resonance parameters of compound nucleus – EXFOR E2133.003 [1]Authors derived resonance parameters (E p and Γ p ) of 8B from measurement ofproton angular distribution in p+7Be →8B → p+7Be elastic scattering in the
inverse kinematics technique. These values can be easily compiled in the EXFOR
format as follows
Resonance energy: (1-H-1(4-BE-7,0),,EN)
Elastic width:(1-H-1(4-BE-7,EL),,WID)(2) Resonance parameters of residual nucleus – EXFOR C1707.002 [2]Authors derived resonance parameters (E x , Γ α , ωγ) of 19Ne from measurement ofα decay branching ratios of 19Ne populated by 19F(3He,t)19Ne and known lifetimes for various 19Ne resonance states. Because they are tabulated as a functionof the excitation level energy of 19Ne, we cannot compile these parameters as wehave done for “classical” resonance parameters for neutron-induced reaction. Also
we do not know what should be coded in SF1 (target) and SF2 (projectile) whichforms the compound 19Ne resonances.
Resonance properties derived by both methods have been also used for the nuclear
structure data evaluation. The XUNDL database (Experimental Unevaluated Nuclear
Data List) compiled by McMaster University, Argonne National Laboratory andTriangle Universities is an example of experimental resonance parameter collections
for structure data evaluators and above two data sets are compiled in XUNDL.
We propose the following restriction:“Resonance parameters are compiled when both the projectile and target leading to
the compound resonance are clarified by authors, and also the parameters aregiven as a function of incident energy on resonance (compiled under data headingEN-RES or, when determined in the same experiment, as REACTION withSF6=EN).”
Note that compilers ask authors when the reference frame (lab. or c.m.) is not clear forthe resonance parameters.
Erroneous subentries
In this occasion, we searched some suspicious resonance parameter compilation inEXFOR. Centres are requested to correct the affected entries or, if they fall under theabove restriction, to delete the affected (sub)entries.
1) Resonance energy (SF6=EN) coded with SF3 ≠ 013197.005
23017.00631475.002-004, 31668.003
40894.002, 40894.004, 41398.002-003, 41399.002
C0115.006, C1502.002
D0544.004-005
K2002.003, K2061.003
T0089.004, T0236.010, T0268.003-004

2) Resonance spin J (SF6=J) coded with SF3 ≠ 022318.004, 23017.006
40894.002, 40894.004
C1674.002
E1494.006, E1494.011-012
F0948.003
T0236.010, T0268.003-004

3) Resonance spin L (SF6=L) coded with SF3 ≠ 0C0295.003-004, C1561.002-004, C1634.002
E1494.006, E1494.011-012

4) Resonance parity (SF6=PTY) coded with SF3 ≠ 041267.005
C1487.002, C1634.002, C1674.002
T0236.010, F0516.002, F0948.003
T0268.003-004

5) Resonance width (SF6=WID) coded with SF3 = 0.
12923.003
40383.007
D5032.003-004, D5032.006-007, D5035.003-006
F0632.005, F0632.007-008, F0800.007-008
O0810.002, O1068.002, O1108.002

References[1] H. Yamaguchi et al, Phys. Lett. B 672(2009)230 (XUNDL 2009YA01)[2] W. P. Tan et al., Phys. Rev. C 79(2009)055805 (XUNDL 2009TA09)

Distribution:
blokhin@ippe.ru
chiba@earth.sgu.ac.jp
claes.nordborg@oecd.org
emmeric.dupont@oecd.org
ganesan@barc.gov.in
gezg@ciae.ac.cn
hongwei@ciae.ac.cn
jhchang@kaeri.re.kr
j.roberts@iaea.org
kaltchenko@kinr.kiev.ua
katakura.junichi@jaea.go.jp
kato@nucl.sci.hokudai.ac.jp
kiralyb@atomki.hu
l.vrapcenjak@iaea.org
manuel.bossant@oecd.org
manokhin@ippe.ru
mmarina@ippe.ru
mwherman@bnl.gov
nicolas.soppera@oecd.org
nklimova@kinr.kiev.ua
cc:
hispin@univmail.cis.mcmaster.ca

n.otsuka@iaea.org
nrdc@jcprg.org
oblozinsky@bnl.gov
ogritzay@kinr.kiev.ua
otto.schwerer@aon.at
pronyaev@ippe.ru
r.forrest@iaea.org
samaev@obninsk.ru
s.babykina@polyn.kiae.su
scyang@kaeri.re.krs.dunaeva@iaea.org
stakacs@atomki.hu
stanislav.hlavac@savba.sk
taova@expd.vniief.ru
tarkanyi@atomki.hu
varlamov@depni.sinp.msu.ru
vlasov@kinr.kiev.ua
vmclane@optonline.net
v.zerkin@iaea.org
yolee@kaeri.re.kr