ENTRY 14618 20200318 14691461800000001 SUBENT 14618001 20200318 14691461800100001 BIB 11 36 1461800100002 TITLE Emission of alpha particles in the fission of U238 by 1461800100003 11- to 21-MeV protons 1461800100004 AUTHOR (T.D.Thomas,S.L.Whetstone Jr) 1461800100005 INSTITUTE (1USALAS) 1461800100006 REFERENCE (J,PR,144,1060,1966) 1461800100007 #doi:10.1103/PhysRev.144.1060 1461800100008 REL-REF (O,C2472001,T.D.Thomas+,J,PR,144,1060,1966) Charged 1461800100009 particle data for U238 1461800100010 SAMPLE The Cf252 source, about 1/8 in. in diameter, mounted 1461800100011 on 0.003-in. platinum foil and covered with a 1461800100012 100-mu-g/cm2 nickel foil, provided about 10e5 1461800100013 fissions/min for calibration. 1461800100014 METHOD (COINC) 1461800100015 DETECTOR (SIBAR,TELES) 1461800100016 The fission detectors were p-n junction semiconductor 1461800100017 devices, approximately 1 cm sq and self-collimated, 1461800100018 with each subtending an angle of about 14 degrees at 1461800100019 the center of the chamber. For the fission-fragment 1461800100020 measurements, the cover foils were removed and a lower 1461800100021 level discriminator was set to prevent the natural 1461800100022 decay alpha particles from being counted. 1461800100023 The light charged particles were detected in a deltaE-E1461800100024 counter telescope consisting of two semiconductor 1461800100025 detectors: a totally depleted deltaE detector, 112 mu-m1461800100026 thick, followed by an E detector, depleted to depth 1461800100027 of about 400 mu-m. An Al foil with a surface density 1461800100028 of 6.6 mg/cm2 prevented fission fragments and low- 1461800100029 energy electrons from reaching the detectors, 1461800100030 yet transmitted alpha particles with energies greater 1461800100031 than 5.5 MeV. For the alpha-particle measurements, the 1461800100032 counter telescope was covered with 7.6 mg/cm2 of 1461800100033 aluminum to stop fission fragments and alpha particles 1461800100034 from natural decay. 1461800100035 PART-DET (FF,A) 1461800100036 ERR-ANALYS (DATA-ERR) No information on source of uncertainty. 1461800100037 HISTORY (20200318C) OG. 1461800100038 ENDBIB 36 0 1461800100039 NOCOMMON 0 0 1461800100040 ENDSUBENT 39 0 1461800199999 SUBENT 14618002 20200318 14691461800200001 BIB 2 6 1461800200002 REACTION (98-CF-252(0,F),,DA,A+FF,RSD) 1461800200003 Angular-correlation results are normalized to unity at 1461800200004 90 degrees. 1461800200005 Given angle is angle between alpha particle and fission1461800200006 fragment. 1461800200007 STATUS (TABLE) Tab.I (p.1063) in Phys.Rev.,144,1060,1966 1461800200008 ENDBIB 6 0 1461800200009 NOCOMMON 0 0 1461800200010 DATA 3 3 1461800200011 ANG-RL DATA DATA-ERR 1461800200012 ADEG NO-DIM NO-DIM 1461800200013 70. 0.278 0.022 1461800200014 100. 0.959 0.068 1461800200015 119. 0.151 0.024 1461800200016 ENDDATA 5 0 1461800200017 ENDSUBENT 16 0 1461800299999 SUBENT 14618003 20200318 14691461800300001 BIB 3 4 1461800300002 REACTION (98-CF-252(0,F)2-HE-4,TER,FY) 1461800300003 MISC-COL (MISC) The probability for light-charged-particle 1461800300004 emission in the spontaneous fission of Cf252 1461800300005 STATUS (TABLE) Text (p.1070) in Phys.Rev.,144,1060,1966 1461800300006 ENDBIB 4 0 1461800300007 NOCOMMON 0 0 1461800300008 DATA 4 1 1461800300009 DATA DATA-ERR MISC MISC-ERR 1461800300010 PC/FIS PC/FIS PC/FIS PC/FIS 1461800300011 3.27E-01 0.10E-01 3.47E-01 0.10E-01 1461800300012 ENDDATA 3 0 1461800300013 ENDSUBENT 12 0 1461800399999 ENDENTRY 3 0 1461899999999