ENTRY 12576 20180608 14421257600000001
SUBENT 12576001 20180608 14421257600100001
BIB 10 23 1257600100002
TITLE Capture Cross-Section of Americium-241 for Pile 1257600100003
Neutrons 1257600100004
AUTHOR (G.T.Seaborg,W.M.Manning) 1257600100005
REFERENCE (R,CS-3471,4,1946) 1257600100006
INSTITUTE (1USAANL) 1257600100007
FACILITY (REAC,1USAORL) U-graphite reactor, X-10. 1257600100008
INC-SPECT Reactor spectrum. 1257600100009
SAMPLE 1.7 microg sample of 241Am. 1257600100010
PART-DET (A) 1257600100011
METHOD (ACTIV) Americium sample was bombarded for five weeks 1257600100012
in the Clinton pile. After bombardment the alpha 1257600100013
activity of the sample was observed to consist of 1257600100014
40.3% at 4.1 cm range of 241Am and 59.7% at the 4.7 1257600100015
cm range of 242Cm [formed as a result of the reaction 1257600100016
241Am(n,gamma)242Am(beta-)242Cm]. 1257600100017
HISTORY (19760804T) Translated from SCISRS. 1257600100018
(19841004A) Converted to reaction formalism. 1257600100019
(20180608A) BP: Updated to new date formats,lower 1257600100020
case. Corrections according last EXFOR rules and 1257600100021
Dict. and CP-D/841 Rev.=WP2014-45, clarified the 1257600100022
situation with the cross section recalculation and 1257600100023
added present day half lives and branching ratios for 1257600100024
comparison. 1257600100025
ENDBIB 23 0 1257600100026
NOCOMMON 0 0 1257600100027
ENDSUBENT 26 0 1257600199999
SUBENT 12576002 20180608 14421257600200001
BIB 5 8 1257600200002
REACTION (95-AM-241(N,G)95-AM-242-G,,SIG,,SPA) 1257600200003
ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. 1257600200004
DECAY-DATA (95-AM-241,490.YR) 1257600200005
(95-AM-242-G,18.HR,B-,,1.0) 1257600200006
(96-CM-242,0.4YR) 1257600200007
CORRECTION Corrected for 242Cm decay during the bombardment. 1257600200008
STATUS (OUTDT,12576003) 1257600200009
(TABLE) page 4. 1257600200010
ENDBIB 8 0 1257600200011
NOCOMMON 0 0 1257600200012
DATA 3 1 1257600200013
EN-DUMMY DATA DATA-ERR 1257600200014
MEV B PER-CENT 1257600200015
2.53E-08 5.60E+02 15. 1257600200016
ENDDATA 3 0 1257600200017
ENDSUBENT 16 0 1257600299999
SUBENT 12576003 20180608 14421257600300001
BIB 5 15 1257600300002
REACTION (95-AM-241(N,G)95-AM-242-G,,SIG,,SPA) 1257600300003
STATUS (DEP,12576002) 1257600300004
(RNORM,12576002) 1257600300005
COMMENT Cross section was recalculated by NNCSC using 1970s 1257600300006
values for the half lives and branching ratios: 84% 1257600300007
for 16hr Am242 beta branch to Cm242. Assumed Am241 1257600300008
T1/2= 459yr and Cm242 T1/2=163d. 1257600300009
Compiler's comment: The 2018 values for 242Am 1257600300010
T1/2=16.02 h, 241Am T1/2=432.6 y, and 242Cm T1/2=162.8 1257600300011
days. Beta decay branching ratio of 242Am to 242Cm is 1257600300012
82.7%. 1257600300013
DECAY-DATA (95-AM-241,459.YR) 1257600300014
(95-AM-242-G,16.HR,B-,,1.0) 1257600300015
(96-CM-242,0163.D) 1257600300016
HISTORY (20180608A) BP: Clarified cross section recalculation. 1257600300017
ENDBIB 15 0 1257600300018
NOCOMMON 0 0 1257600300019
DATA 2 1 1257600300020
EN-DUMMY DATA 1257600300021
MEV B 1257600300022
2.53E-08 8.00E+02 1257600300023
ENDDATA 3 0 1257600300024
ENDSUBENT 23 0 1257600399999
ENDENTRY 3 0 1257699999999