SUBENT 22846001 20211007 23042284600100001
BIB 19 81 2284600100002
TITLE Neutron capture studies on unstable 135Cs for 2284600100003
nucleosynthesis and transmutation 2284600100004
AUTHOR (N.Patronis, S.Dababneh, P.A.Assimakopoulos, R.Gallino,2284600100005
M.Heil, F.Kaeppeler, D.Karamanis, P.E.Koehler, 2284600100006
A.Mengoni, R.Plag) 2284600100007
INSTITUTE (2GRCIOA,2GERKFK,2ITYTUR,1USAORL,2ZZZCER) 2284600100008
REFERENCE (J,PR/C,69,025803,2004) 2284600100009
(R,INDC(GER)-0053,2021) Revised values of Karlsruhe 2284600100010
cross sections. 2284600100011
FACILITY (VDG,2GERKFK) 3.7 MV VdG (for 30+500 keV irradiations)2284600100012
(REAC,2GERMNZ) TRIGA reactor(to obtain number of 135Cs)2284600100013
INC-SOURCE (P-LI7) Li (30 um for En~30 keV and 10 um for 2284600100014
En~500 keV, 6 mm in diam.) evaporated on to a 1.0 mm 2284600100015
thick Cu backing irradiated by proton beam 2284600100016
(Ep=1892 keV for En~30 keV, Ep=2284 keV for 2284600100017
En~500 keV) typically 90 to 100 uA. 2284600100018
(REAC) in 2GERMNZ 2284600100019
INC-SPECT Calculated from DDX of 7Li(p,n)7Be by using a code 2284600100020
NYIELD (NOT a quasi-Maxwellian spectrum) 2284600100021
Epithermal(En>0.4 eV)/thermal=4/70 at the irradiation 2284600100022
position 2284600100023
SAMPLE Cs sample (0.03 mm thick, 6 mm in diam., was specified 2284600100024
as 1.8E+15 135Cs atoms corresponding to a total mass 2284600100025
of ~400 ng) implanted in a graphite disc (0.1 mm 2284600100026
thick and 6 mm in diam.) and canned in a cylindrical 2284600100027
graphite box with 0.3 mm thick walls, which was 2284600100028
sandwiched between two Au foils. 2284600100029
The number of 135Cs was determined by reactor neutron 2284600100030
irradiation via the well-known thermal neutron 2284600100031
capture cross section (T.Katoh et al., 1997). 2284600100032
Au foils were replaced approximately every three days 2284600100033
because of the half-life of 198Au (2.7 d). 2284600100034
METHOD (ACTIV) Irradiation lasted for about two weeks 2284600100035
(GSPEC) Measurement of two weeks following irradiation 2284600100036
DETECTOR (HPGE) Two Clover-type HPGe (Ge crystal with ~50 mm in 2284600100037
diam. and ~70 mm long) with efficiency of 2284600100038
(1.069+/-0.017)E-01 for the 136Cs 818.5 keV line 2284600100039
(HPGE) 40 cm3 HPGe to measure Au and Re foils activity 2284600100040
with efficiency of (2.20+/-0.03)E-03 for the 198Au 2284600100041
412 keV line 2284600100042
(GLASD) Li-6 glass detector at 0 deg to monitor flux 2284600100043
variation at KFK VdG 2284600100044
MONITOR (79-AU-197(N,G)79-AU-198,,SIG,,SPA) 2284600100045
DECAY-MON (79-AU-198-G,2.6952D,DG,411.8,0.9558) 2284600100046
REL-REF (R,,J.F.Mughabghab,B,NEUT.CS 1B,,,1984) 2284600100047
Thermal data for 185,187Re(n,gamma) 2284600100048
(R,22342002,T.Katoh+,J,NST,34,431,1997) 2284600100049
135Cs(n-th,gamma) cross section = 8.3+/-0.3 barn 2284600100050
(R,22342004,T.Katoh+,J,NST,34,431,1997) 2284600100051
135Cs(n-th,gamma) resonance integral = 37.9+/-2.7 barn2284600100052
DECAY-DATA (55-CS-136-G,13.16D,DG,818.5,0.997) 2284600100053
ASSUMED Values adopted for analysis of thermal data: 2284600100054
135Cs(n,gamma)136Cs 2284600100055
sigma(n-th,gamma)=8.3+/-0.3 b, Ires=37.9+/-2.7 b 2284600100056
T1/2=13.16(3) d, Eg=818.5 keV, Ig=99.7(6)% 2284600100057
185Re(n,gamma)186Re 2284600100058
sigma(n-th,gamma)=112(2.0) b, Ires=1717(50) b 2284600100059
T1/2=3.7183(11) d, Eg=137.2 keV, Ig=9.42(6)% 2284600100060
187Re(n,gamma)188g+mRe 2284600100061
sigma(n-th,gamma)=76.4(10) b, Ires=300(20) b 2284600100062
T1/2=17.0040(22) h, Eg=155.0 keV, Ig=15.61(18)% 2284600100063
187Re(n,gamma)188mRe 2284600100064
sigma(n-th,gamma)=2.8(1) b, 2284600100065
T1/2=18.59(4) min. 2284600100066
CORRECTION Data are corrected for 2284600100067
- self-attenuation 2284600100068
- dead time 2284600100069
- difference of neutron flux at Au and Cs foil position2284600100070
- decay during irradiation 2284600100071
- time variation in neutron flux 2284600100072
ADD-RES (DECAY) T1/2(136Cs)=13.04+/-0.03 d (818.5 keV line), 2284600100073
=13.04+/-0.04 d (1048 keV line). 2284600100074
STATUS (APRVD) Approved by Franz Kaeppeler (2014-09-09) 2284600100075
HISTORY (20041206C) SM 2284600100076
(20101105A) SD: DOI for Phys.Rev. added. Author's name 2284600100077
corrected. ERR-1 deleted from COMMON 2284600100078
(20130112A) SD: EN-MEAN -> KT in Subent 6. Subents 7-102284600100079
were deleted (No data measured in this experiment). 2284600100080
(20140828A) On.001-004,006 revised. 005 moved to 22448.2284600100081
(20211007A) SD: Corrections in all Subents. 2284600100082
Subents 011-017 added. 2284600100083
ENDBIB 81 0 2284600100084
NOCOMMON 0 0 2284600100085
ENDSUBENT 84 0 2284600199999
SUBENT 22846006 20211007 23042284600600001
BIB 6 15 2284600600002
REACTION (55-CS-135(N,G)55-CS-136,,SIG,,MXW,CALC) 2284600600003
ANALYSIS Folding of point-wise cross sections by Maxwellian 2284600600004
spectrum 2284600600005
REL-REF (D,22448002,S.Jaag+,J,NP/A,621,247,1997) 2284600600006
sig(kT=30 keV)=198+/-17 mb 2284600600007
(R,22099002,W.Ratynski+,J,PR/C,37,595,1988) 2284600600008
Spectrum averaged cross section to renormalize 2284600600009
the ENDF/B-VI 197Au(n,g)198Au cross section 2284600600010
ERR-ANALYS (DATA-ERR) No information on source of uncertainties 2284600600011
STATUS (TABLE) Table VIII of Phys.Rev.C69(2004)025803 2284600600012
(DEP,22846004) point-wise cross section given 2284600600013
(SPSDD,22846013) Renormalized. 2284600600014
HISTORY (20130112A) SD: EN-MEAN -> KT. 2284600600015
(20140828A) On. REACTION(SF9): DERIV -> CALC 2284600600016
(20211007A) SD: Subent superseded. 2284600600017
ENDBIB 15 0 2284600600018
NOCOMMON 0 0 2284600600019
DATA 3 12 2284600600020
KT DATA DATA-ERR 2284600600021
KEV MB MB 2284600600022
5. 522. 52. 2284600600023
8. 383. 36. 2284600600024
10. 329. 30. 2284600600025
15. 251. 21. 2284600600026
20. 208. 17. 2284600600027
25. 180. 13. 2284600600028
30. 160. 10. 2284600600029
40. 134. 8.7 2284600600030
50. 117. 8.2 2284600600031
60. 105. 7.3 2284600600032
80. 88.0 6.2 2284600600033
100. 78.7 5.7 2284600600034
ENDDATA 14 0 2284600600035
ENDSUBENT 34 0 2284600699999