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 22846004 20211007 23042284600400001
BIB 7 18 2284600400002
REACTION (55-CS-135(N,G)55-CS-136,,SIG,,,CALC) 2284600400003
ANALYSIS Calculated by Hauser-Feshbach Statistical Model (HFSM) 2284600400004
normalized to present data at En~30 keV and 500 keV 2284600400005
REL-REF (R,22099002,W.Ratynski+,J,PR/C,37,595,1988) 2284600400006
Spectrum averaged cross section to renormalize 2284600400007
the ENDF/B-VI 197Au(n,g)198Au cross section 2284600400008
COMMENT By Franz Kaeppeler (2014-08-28): 2284600400009
This data set gives point-wise cross sections based 2284600400010
on our HFSM calculation. 2284600400011
ERR-ANALYS (DATA-ERR) Experimental uncertainty as well as 2284600400012
additional uncertainty due to extrapolation for 2284600400013
data below 30 keV and above 500 keV 2284600400014
STATUS (TABLE) Table VI of Phys.Rev.C69(2004)025803 2284600400015
(DEP,22846002) En~30 keV measured cross section 2284600400016
(DEP,22846003) En~500 keV measured cross section 2284600400017
(SPSDD,22846012) Renormalized. 2284600400018
HISTORY (20140828A) On. REACTION(SF9): DERIV -> CALC 2284600400019
(20211007U) SD: Subent superseded. 2284600400020
ENDBIB 18 0 2284600400021
NOCOMMON 0 0 2284600400022
DATA 3 16 2284600400023
EN DATA DATA-ERR 2284600400024
KEV MB MB 2284600400025
1. 1561. 156. 2284600400026
3. 676. 68. 2284600400027
5. 482. 48. 2284600400028
10. 317. 28. 2284600400029
20. 213. 17. 2284600400030
30. 160. 10. 2284600400031
40. 133. 9. 2284600400032
50. 115. 8. 2284600400033
60. 104. 7. 2284600400034
80. 88.2 6.2 2284600400035
100. 78.3 5.5 2284600400036
200. 56.3 4.0 2284600400037
300. 43.2 3.4 2284600400038
400. 37.8 3.2 2284600400039
500. 34.9 3.0 2284600400040
1000. 30.6 3.8 2284600400041
ENDDATA 18 0 2284600400042
ENDSUBENT 41 0 2284600499999