ENTRY M0411 20100127 M051M041100000001 SUBENT M0411001 20100127 M051M041100100001 BIB 15 32 M041100100002 TITLE Electron-pair creation on the uranium nucleus. M041100100003 AUTHOR (N.K.SHERMAN,W.F.DAVIDSON,A.NOWAK,M.KOSAKI,J.ROY, M041100100004 W.DELBIANCO,G.KAJRYS) M041100100005 REFERENCE (J,PRL,54,1649,1985) M041100100006 INSTITUTE (1CANOTC) M041100100007 FACILITY (LINAC,1CANOTC) M041100100008 INC-SOURCE (QMPH,TAGD) The tagging system was a special photon M041100100009 spectrometer consisting of a liquid-deuterium target M041100100010 viewed by time-of-flight detector for neutrons from M041100100011 the reaction H-2(g,n). M041100100012 METHOD (EXTB) M041100100013 DETECTOR (NAICR) M041100100014 PART-DET (G) M041100100015 SAMPLE The absorber consisted of two U disks of total M041100100016 thickness 13.935 mm and mass 530.86 g (density = M041100100017 18.759 g/cm**2). M041100100018 ANALYSIS The absolute absorption cross section was determined M041100100019 from 4000 cycles of interchange of absorber and M041100100020 blank. the values obtained from parabolic fits to M041100100021 data are presented. M041100100022 ERR-ANALYS (ERR-S) The statistical errors. M041100100023 (ERR-SYS) The total errors which include the M041100100024 statistical and systematical (about 0.2%) M041100100025 uncertainties are presented. M041100100026 COMMENT The total-absorption cross section of uranium for M041100100027 photon energies between 10 and 20 MeV was obtained M041100100028 and used for estimation of the cross section for M041100100029 pair creation on the U-238 nucleus. M041100100030 STATUS (TABLE) M041100100031 HISTORY (19910218C) M041100100032 (20091001A) Correction of AUTHOR - N.K.SHEMAN, M041100100033 dates, lowercase, DATA-ERR replaced by ERR-S. M041100100034 ENDBIB 32 0 M041100100035 COMMON 1 3 M041100100036 ERR-SYS M041100100037 PER-CENT M041100100038 .2 M041100100039 ENDCOMMON 3 0 M041100100040 ENDSUBENT 39 0 M041100199999 SUBENT M0411002 20100127 M051M041100200001 BIB 1 1 M041100200002 REACTION (92-U-238(G,ABS),,SIG) M041100200003 ENDBIB 1 0 M041100200004 NOCOMMON 0 0 M041100200005 DATA 4 2 M041100200006 EN EN-RSL DATA ERR-S M041100200007 MEV MEV MB MB M041100200008 10. .129 21.023 .062 M041100200009 20. .338 26.036 .068 M041100200010 ENDDATA 4 0 M041100200011 ENDSUBENT 10 0 M041100299999 ENDENTRY 2 0 M041199999999