ENTRY 10642 20170815 14301064200000001 SUBENT 10642001 20170815 14301064200100001 BIB 9 22 1064200100002 TITLE Distribution of mass, kinetic energy and neutron 1064200100003 yield in the spontaneous fission of 254Fm 1064200100004 AUTHOR (J.E.Gindler,K.F.Flynn,L.E.Glendenin,R.K.Sjoblom) 1064200100005 REFERENCE (J,PR/C,16,1483,197710) 1064200100006 #doi:10.1103/PhysRevC.16.1483 1064200100007 (C,73ROCH,2,19,1973) The preliminary data. 1064200100008 INSTITUTE (1USAANL) 1064200100009 DETECTOR (PROPC) Low background beta proportional counter 1064200100010 METHOD (CHSEP) 254Fm was separated from einsteinium sources 1064200100011 containing a few percent by mass of 254Es. For 1064200100012 radiochemical measurement the purified fermium 1064200100013 fraction was deposited on platinum disks. The 1064200100014 isotopic composition of sources was determined by 1064200100015 observing both alpha and spontaneous decays. 1064200100016 CORRECTION Corrected for chemical yield, counter efficiency, 1064200100017 genetic relationships, relative saturation, mass 1064200100018 dependent energy calibration, and neutron emission 1064200100019 transformation. 1064200100020 STATUS (APRVD) Approved by K.F.Flynn 1978/3/1 1064200100021 HISTORY (19780123C) 1064200100022 (20080814A) converted to new date formats, lower case. 1064200100023 (20170815A) BP: added doi, description and nubar data. 1064200100024 ENDBIB 22 0 1064200100025 NOCOMMON 0 0 1064200100026 ENDSUBENT 25 0 1064200199999 SUBENT 10642002 20170815 14301064200200001 BIB 4 5 1064200200002 REACTION (100-FM-254(0,F)ELEM/MASS,CUM,FY) 1064200200003 ERR-ANALYS (DATA-ERR) Estimates based on number of measurements, 1064200200004 uncertainties in activities and decay scheme. 1064200200005 MONITOR Total mass yield curve normalized to 200%. 1064200200006 STATUS (TABLE)Table I, page 1484. 1064200200007 ENDBIB 5 0 1064200200008 NOCOMMON 0 0 1064200200009 DATA 5 25 1064200200010 MASS ELEMENT ISOMER DATA DATA-ERR 1064200200011 NO-DIM NO-DIM NO-DIM PC/FIS PC/FIS 1064200200012 91. 38. 0.38 0.04 1064200200013 93. 39. 0.48 0.05 1064200200014 95. 40. 0.54 0.08 1064200200015 97. 40. 1.35 0.13 1064200200016 103. 44. 3.13 0.31 1064200200017 106. 44. 5.75 0.58 1064200200018 109. 46. 5.67 0.57 1064200200019 111. 47. 5.50 0.30 1064200200020 112. 46. 5.06 0.51 1064200200021 115. 48. 0. 4.47 0.44 1064200200022 115. 48. 1. 0.58 0.06 1064200200023 121. 50. 0. 0.666 0.067 1064200200024 125. 50. 0. 0.066 0.007 1064200200025 127. 51. 0.240 0.03 1064200200026 129. 51. 0.880 0.09 1064200200027 131. 53. 2.58 0.26 1064200200028 132. 52. 3.02 0.30 1064200200029 133. 53. 3.29 0.33 1064200200030 140. 56. 5.49 0.55 1064200200031 141. 58. 6.29 0.50 1064200200032 143. 58. 5.64 0.30 1064200200033 144. 58. 5.09 0.50 1064200200034 153. 62. 1.42 0.14 1064200200035 157. 63. 0.62 0.06 1064200200036 159. 64. 0.44 0.04 1064200200037 ENDDATA 27 0 1064200200038 ENDSUBENT 37 0 1064200299999 SUBENT 10642003 20170815 14301064200300001 BIB 4 8 1064200300002 REACTION (100-FM-254(0,F)MASS,CHN,FY) 1064200300003 ERR-ANALYS (DATA-ERR) Estimates based on number of measurements, 1064200300004 uncertainties in activities and decay scheme. 1064200300005 FLAG (1.) Estimated by assuming isomeric ratio (m+g)/g = 1064200300006 1.16+-0.11. 1064200300007 (2.) estimated by assuming isomeric ratio (m+g)/g = 1064200300008 2.1+-0.3 determined for 252Cf(sf). 1064200300009 STATUS (TABLE) Table I, page 1484. 1064200300010 ENDBIB 8 0 1064200300011 NOCOMMON 0 0 1064200300012 DATA 4 3 1064200300013 MASS DATA DATA-ERR FLAG 1064200300014 NO-DIM PC/FIS PC/FIS NO-DIM 1064200300015 115. 5.05 0.45 1064200300016 121. 0.770 0.080 1. 1064200300017 125. 0.138 0.024 2. 1064200300018 ENDDATA 5 0 1064200300019 ENDSUBENT 18 0 1064200399999 SUBENT 10642004 20170815 14301064200400001 BIB 4 8 1064200400002 REACTION (100-FM-254(0,F),,NU) 1064200400003 ANALYSIS Derived from the mean masses (first moments) of the 1064200400004 light and heavy mass groups (AL and AH) as nubar = 1064200400005 AF-(AL+AH), where AF is the mass of the compound 1064200400006 nucleus for the particular fissioning system. 1064200400007 STATUS (DEP,10642002) 1064200400008 (TABLE) Table II, page 1486. 1064200400009 HISTORY (20170815C) BP 1064200400010 ENDBIB 8 0 1064200400011 NOCOMMON 0 0 1064200400012 DATA 1 1 1064200400013 DATA 1064200400014 PRT/FIS 1064200400015 3.9 1064200400016 ENDDATA 3 0 1064200400017 ENDSUBENT 16 0 1064200499999 ENDENTRY 4 0 1064299999999