ENTRY 14525 20190329 14491452500000001
SUBENT 14525001 20190329 14491452500100001
BIB 11 28 1452500100002
TITLE Pile Neutron Capture Cross Section of 33 Hr. Ce143 1452500100003
AUTHOR (L.P.Roy,L.Yaffe) 1452500100004
REFERENCE (J,CJC,34,238,1956) 1452500100005
#doi:10.1139/v56-036 1452500100006
INSTITUTE (1CANMCG) 1452500100007
FACILITY (REAC,1CANCRC) The NRX nuclear reactor at Chalk River. 1452500100008
DETECTOR (GEMUC) The counter was the "end window" type with a 1452500100009
mica window of mass 2.3 mgm./cm2. 1452500100010
METHOD (ACTIV,CHSEP) Spectroscopically pure samples of 1452500100011
cerium oxide, sealed in small quartz ampoules, were 1452500100012
irradiated in the NRX nuclear reactor at different 1452500100013
neutron fluxes for different times. After irradiation, 1452500100014
the cerium oxide was removed from the quartz ampoule 1452500100015
and chemically separated. The final hydroxide 1452500100016
precipitate was transferred as a slurry to an 1452500100017
aluminum tray, where it was spread evenly, dried, and 1452500100018
the counting-rate determined by a Geiger-Miiller 1452500100019
counter. The pile neutron capture cross section of 1452500100020
the 33 hr. Ce143 was determined by separating Pr144, 1452500100021
the daughter of Ce144, from the rigorously-purified 1452500100022
cerium at frequent intervals. The amount of Pr144 1452500100023
formed increased linearly with the square of the 1452500100024
neutron flux in a manner consistent with that of a 1452500100025
successive neutron capture reaction. 1452500100026
MONITOR (58-CE-142(N,G)58-CE-143,,SIG) 1452500100027
MONIT-REF ((MONIT)12051001,L.P.Roy+,J,CJC,34,1023,1956) 1452500100028
DECAY-DATA (58-CE-143,33.0HR,B-) 1452500100029
HISTORY (20190329C) BP 1452500100030
ENDBIB 28 0 1452500100031
COMMON 2 3 1452500100032
MONIT EN-DUMMY 1452500100033
B EV 1452500100034
0.95 0.0253 1452500100035
ENDCOMMON 3 0 1452500100036
ENDSUBENT 35 0 1452500199999
SUBENT 14525002 20190329 14491452500200001
BIB 3 3 1452500200002
REACTION (58-CE-143(N,G)58-CE-144,,SIG,,SPA) 1452500200003
ERR-ANALYS (DATA-ERR) No information on sources of uncertainties. 1452500200004
STATUS (TABLE) page 243. 1452500200005
ENDBIB 3 0 1452500200006
NOCOMMON 0 0 1452500200007
DATA 2 1 1452500200008
DATA DATA-ERR 1452500200009
B B 1452500200010
6.0 0.7 1452500200011
ENDDATA 3 0 1452500200012
ENDSUBENT 11 0 1452500299999
ENDENTRY 2 0 1452599999999