ENTRY 31720 20140401 31633172000000001
SUBENT 31720001 20140401 31633172000100001
BIB 14 42 3172000100002
TITLE Measurement of 241Am ground state radiative neutron 3172000100003
capture cross section with cold neutron beam 3172000100004
AUTHOR (T.Belgya, L.Szentmiklosi, Z.Kis, N.M.Nagy, J.Konya) 3172000100005
INSTITUTE (3HUNKFI,3HUNKOS) 3172000100006
REFERENCE (R,INDC(HUN)-0037,2012) 3172000100007
REL-REF (I,,T.Belgya+,J,JRN,276,269,2008) 3172000100008
Supermirror guide of the in-beam Moessbauer station 3172000100009
FACILITY (REAC,3HUNKFI) Budapest Research Reactor 3172000100010
SAMPLE Total mass: 236.4 +/- 0.5 mg. 3172000100011
Am-241 metal sintered on a 0.196 mm thick Ag backing 3172000100012
and covered by 2.33-um Au layer. 3172000100013
Am mass was determined by 60 keV gamma ray intensity 3172000100014
9.27 MBq (+/- 1.8%) ~ 73.1 mu-g. 3172000100015
Ag thickness was determined by 60 keV gamma ray from 3172000100016
Am-241 layer. 3172000100017
Au thickness was determined by its activity after 3172000100018
irradiation using 62.02 mg Au monitor activity 3172000100019
considering flux attenuation. 3172000100020
INC-SOURCE (REAC) thermal equivalent neutron flux: ~1e+9 n/cm2/s 3172000100021
DETECTOR (LEGE) CANBERRA0215R in a Pb cage 3172000100022
Efficiency determined at 22.7 cm distance from 133Ba, 3172000100023
152Eu and 241Am source. 3172000100024
Resolution: 0.5 keV at 100 keV. 3172000100025
METHOD (ACTIV) Irradiated for 90120 sec. 3172000100026
(GSPEC) Measured at 22.7 cm from target 3172000100027
Au: Measured for 26847 sec after 11.7 days cooling 3172000100028
Am: Measured for 97 hrs after 66308 sec cooling 3172000100029
ASSUMED (ASSUM,95-AM-241(N,G)95-AM-242-G/T,,SIG/RAT) 3172000100030
Branching ratio 3172000100031
ERR-ANALYS (ASSUM-ERR) Branching ratio to 242Am g.s. (syst.) 3172000100032
(ERR-T) Total uncertainty 3172000100033
(ERR-1) Number of 242Am per starting particle in MCNP 3172000100034
calc.(stat.) 3172000100035
(ERR-2) Number of 242Am per starting particle in MCNP 3172000100036
calc.(syst.) 3172000100037
(ERR-3) Number of 198Au (stat.) 3172000100038
(ERR-4) Number of 198Au (syst.) 3172000100039
(ERR-5) Number of 198Au per starting particle in MCNP 3172000100040
calc.(stat.) 3172000100041
STATUS (TABLE) Text in Report INDC(HUN)-0037 (2012) 3172000100042
HISTORY (20120114C) On 3172000100043
(20131222U) VS. 3HUNII -> 3HUNKFI 3172000100044
ENDBIB 42 0 3172000100045
COMMON 7 6 3172000100046
ASSUM ASSUM-ERR ERR-1 ERR-2 ERR-3 ERR-4 3172000100047
ERR-5 3172000100048
NO-DIM PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3172000100049
PER-CENT 3172000100050
0.914 0.8 1.4 1.1 1.0 0.6 3172000100051
0.1 3172000100052
ENDCOMMON 6 0 3172000100053
ENDSUBENT 52 0 3172000199999
SUBENT 31720002 20120114 31543172000200001
BIB 4 15 3172000200002
REACTION (95-AM-241(N,G)95-AM-242-G,,SIG) 3172000200003
DECAY-DATA (95-AM-242-G,16.02HR,XR,99.5,0.0355, 3172000200004
XR,103.4,0.056) 3172000200005
ANALYSIS Unweighted average of 99.5 and 103.4 keV X-rays data 3172000200006
COMMENT - Tamas Belgya (in article): 3172000200007
The mean value of 591 +/- 35 b of our total capture 3172000200008
cross section for 241Am is at the low end of the 3172000200009
most recent values, but is in agreement with most of 3172000200010
them within its uncertainty. 3172000200011
The uncertainty is mainly coming from the systematic 3172000200012
uncertainty of the 242Pu X-ray production probability3172000200013
in the electron conversion of the 242Am ground state.3172000200014
- Tamas Belgya (2012-01-31): 3172000200015
We could measure only the ground state cross section, 3172000200016
but the MCNP can give only the g+m cross section. 3172000200017
ENDBIB 15 0 3172000200018
NOCOMMON 0 0 3172000200019
DATA 3 1 3172000200020
EN DATA ERR-T 3172000200021
MILLI-EV B B 3172000200022
25.3 540. 32. 3172000200023
ENDDATA 3 0 3172000200024
ENDSUBENT 23 0 3172000299999
ENDENTRY 2 0 3172099999999