ENTRY C2472 20200317 C194C247200000001 SUBENT C2472001 20200317 C194C247200100001 BIB 11 31 C247200100002 TITLE Emission of alpha particles in the fission of U238 by C247200100003 11- to 21-MeV protons C247200100004 AUTHOR (T.D.Thomas,S.L.Whetstone Jr) C247200100005 INSTITUTE (1USALAS) C247200100006 REFERENCE (J,PR,144,1060,1966) C247200100007 #doi:10.1103/PhysRev.144.1060 C247200100008 REL-REF (O,14618001,T.D.Thomas+,J,PR,144,1060,1966) SpontaneousC247200100009 fission data for Cf252 C247200100010 FACILITY (VDG,1USALAS) The Los Alamos Model FN Tandem Van de C247200100011 Graaff (from 11 to 17 MeV), the Los Alamos Vertical VanC247200100012 de Graaff (from 15 to 21 MeV). C247200100013 SAMPLE The target was 500 mu-g/cm2 of uranium (U238) oxide C247200100014 deposited by evaporation from a hot 6lament onto a C247200100015 thin carbon film. C247200100016 METHOD (COINC) C247200100017 DETECTOR (SIBAR,TELES) C247200100018 The fission detectors were p-n junction semiconductor C247200100019 devices, approximately 1 cm sq and self-collimated, C247200100020 with each subtending an angle of about 14 degrees at C247200100021 the center of the chamber. C247200100022 The light charged particles were detected in a deltaE-EC247200100023 counter telescope consisting of two semiconductor C247200100024 detectors: a totally depleted deltaE detector, 112 mu C247200100025 thick, followed by an E detector, depleted to depth C247200100026 of about 400 mu. An Al foil with a surface density C247200100027 of 6.6 mg/cm2 prevented fission fragments and low- C247200100028 energy electrons from reaching the detectors, C247200100029 yet transmitted alpha particles with energies greater C247200100030 than 5.5 MeV. C247200100031 PART-DET (FF,A) C247200100032 HISTORY (20200317C) OG. C247200100033 ENDBIB 31 0 C247200100034 NOCOMMON 0 0 C247200100035 ENDSUBENT 34 0 C247200199999 SUBENT C2472002 20200317 C194C247200200001 BIB 4 11 C247200200002 REACTION (92-U-238(P,F),,DA,A+FF,RSD) C247200200003 Angular-correlation results are normalized to unity at C247200200004 90 degrees. C247200200005 Given angle is angle between alpha particle and fissionC247200200006 fragment. C247200200007 FLAG (1.) First running period (normalized to unity at C247200200008 89 degrees). C247200200009 (2.) Second running period C247200200010 (3.) Third running period C247200200011 ERR-ANALYS (DATA-ERR) No information on source of uncertainty. C247200200012 STATUS (TABLE) Tab.I (p.1063) in Phys.Rev.,144,1060,1966 C247200200013 ENDBIB 11 0 C247200200014 NOCOMMON 0 0 C247200200015 DATA 5 28 C247200200016 EN ANG-RL DATA DATA-ERR FLAG C247200200017 MEV ADEG NO-DIM NO-DIM NO-DIM C247200200018 11. 70. 0.280 0.079 1. C247200200019 11. 71. 0.397 0.052 2. C247200200020 11. 110. 0.778 0.082 1. C247200200021 11. 129. 0.082 0.041 1. C247200200022 12. 71. 0.419 0.058 2. C247200200023 13. 71. 0.404 0.041 2. C247200200024 14. 79. 0.280 0.079 1. C247200200025 15. 41. 0.040 0.015 1. C247200200026 15. 60. 0.176 0.022 1. C247200200027 15. 70. 0.296 0.023 1. C247200200028 15. 70. 0.35 0.03 3. C247200200029 15. 71. 0.34 0.03 3. C247200200030 15. 81. 0.815 0.057 2. C247200200031 15. 100. 0.895 0.061 2. C247200200032 15. 109. 0.613 0.079 2. C247200200033 15. 110. 0.735 0.042 1. C247200200034 15. 129. 0.099 0.015 1. C247200200035 15. 150. 0.023 0.079 2. C247200200036 15. 169. 0.008 0.013 2. C247200200037 15. 169. 0.045 0.012 1. C247200200038 15. 179. 0.079 0.014 1. C247200200039 17. 70. 0.29 0.03 3. C247200200040 17. 71. 0.34 0.02 3. C247200200041 21. 70. 0.28 0.02 3. C247200200042 21. 110. 0.68 0.04 3. C247200200043 21. 130. 0.087 0.017 3. C247200200044 21. 159. 0.052 0.011 3. C247200200045 21. 170. 0.079 0.012 3. C247200200046 ENDDATA 30 0 C247200200047 ENDSUBENT 46 0 C247200299999 SUBENT C2472003 20200317 C194C247200300001 BIB 6 14 C247200300002 REACTION (92-U-238(P,F)2-HE-4,TER,FY) C247200300003 MONITOR (98-CF-252(0,F)2-HE-4,TER,FY) C247200300004 MONIT-REF (14618001,T.D.Thomas+,J,PR,144,1060,1966) Obtained by C247200300005 authors C247200300006 MISC-COL (MISC) Light-charged-particle emission probability C247200300007 Y lcp = (1.06+-0.01)Y alpha - authors assumed that for C247200300008 induced fission the ratio of the yield of all light C247200300009 charged particles to the yield of alpha particles in C247200300010 the spontaneous fission of Cf252 is the same C247200300011 ERR-ANALYS (DATA-ERR) The uncertainties indicated are those due toC247200300012 the counting statistics for both 'true' and 'chance' C247200300013 events and to the uncertainty (+-5%) in the relative C247200300014 time intervals over which these were counted. C247200300015 STATUS (TABLE) Tab.IV (p.1066) in Phys.Rev.,144,1060,1966 C247200300016 ENDBIB 14 0 C247200300017 COMMON 2 3 C247200300018 MONIT MONIT-ERR C247200300019 PC/FIS PC/FIS C247200300020 3.27E-01 0.10E-01 C247200300021 ENDCOMMON 3 0 C247200300022 DATA 5 7 C247200300023 EN DATA DATA-ERR MISC MISC-ERR C247200300024 MEV PC/FIS PC/FIS PC/FIS PC/FIS C247200300025 11. 2.12E-01 0.16E-01 2.25E-01 0.17E-01 C247200300026 12. 1.88E-01 0.15E-01 1.99E-01 0.16E-01 C247200300027 13. 2.04E-01 0.15E-01 2.16E-01 0.16E-01 C247200300028 14. 2.18E-01 0.16E-01 2.31E-01 0.17E-01 C247200300029 15. 2.20E-01 0.13E-01 2.33E-01 0.14E-01 C247200300030 17. 2.28E-01 0.14E-01 2.42E-01 0.15E-01 C247200300031 21. 2.43E-01 0.15E-01 2.58E-01 0.16E-01 C247200300032 ENDDATA 9 0 C247200300033 ENDSUBENT 32 0 C247200399999 ENDENTRY 3 0 C247299999999