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