/*===================================================================*/ /* NRDF D1659 Data No.9 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,9; D#=D1659; TITLE=/Two deformation paths in proton-induced fission of 232Th/; PURPOSE=/Accurate measurements of complementary fission fragmentvelocities in the proton-induced fission of 232th/; ATH=(Y.NAGAME'1', I.NISHINAKA'1', K.TSUKADA'1', Y.OURA'1', S.ICHIKAWA'1', H.IKEZOE'1', Y.L.ZHAO'2', K.SUEKI'2', H.NAKAHARA'2', M.TANIKAWA'3', T.OHTSUKI'4', H.KUDO'5', Y.HAMAJIMA'6', K.TAKAMIYA'7', Y.H.CHUNG'8'); INST-ATH=(2JPNJAE'1', 2JPNTMU'2', 2JPNTOK'3', 2JPNTOH'4', 2JPNNII'5', 2JPNJPN'6', 2JPNOSA'7', 3KORKOR'8'); /* '2' Department of Chemistry */ /* '3' Department of Chemistry */ /* '4' Laboratory of Nuclear Science */ /* '5' Department of Chemistry */ /* '6' Department of Chemistry, Kanazawa University, Kanazawa */ /* '7' Department of Chemistry */ /* '8' Department of Chemistry, Hallym University, Chuncheon */ REF=PL/B; VLP=387(1996)26; RCTS=232TH(P,FISSN); PHQS=(A-DSTRN'9', AVER-KIN-ENGY'10', ENGY-SPEC'11', ENGY-SPEC'12', ENGY-SPEC'13', ENGY-SPEC'14', ENGY-SPEC'15'); /* '9' Heavy fragment mass distribution */ /* '10' average total kinetic energy */ /* '11' total kinetic energy distribution (A=126) */ /* '12' total kinetic energy distribution (A=128) */ /* '13' total kinetic energy distribution (A=130) */ /* '14' total kinetic energy distribution (A=132) */ /* '15' total kinetic energy distribution (A=134) */ /*===================================================================*/ /* Experimental Conditions */ /*===================================================================*/ \\EXP,9; /* 2003-11-22 : Converted, Data converted to EXFOR E1659 and EXFOR O0383. */ RTY=FISSN; CHM=ELM; PHYS-FORM=SLD; THK-TGT=0.07MG/CM**2; BAC=C; THK-BAC=0.02MG/CM**2; POL-TGT=0%; ALGN-TGT=0%; ACC=VDGT; INST-ACC=2JPNJAE; BEAM-INTNSTY=500[800NA; POL-PRJ=0%; DET-PARTCL=X'16'; /* '16' Fission Fragments */ COINC=NO; ANT-COINC=NO; DET-SYS=(MCPLT'17',SBD'18',MCPLT'19',PPAC'20'); /* '17' Placed at theta(lab)=50deg. Used as start and stop ToF (ToF1) detectors with carbon foil (30-micro gram/cm2). The flight path and solid angle are 55 cm and 0.17 msr, respectively. */ /* '18' Placed behind the stop MCPD. Used for stop and energy signals. */ /* '19' Placed at theta(lab)=130deg. Used to deliver start ToF signal (ToF2) to detect complementary fragments of ToF1. The flight path and solid angle are 50 cm and 32 msr, respectively. */ /* '20' Used to deliver stop signal of ToF (ToF2). */ ERS-DET=<2.5MEV'21'; /* '21' for total kinetic energy */ CALB-DET=/ Velocity calibration was performed using the 240 MeV 127I beam to bombard thin (70-100 micro-gram/cm2) calibration targets, natAg, natIn, natSb, and 209Bi. Each target was evaporated on 30 micro-gram/cm2 thick carbon foils. The recoil nuclei and the elastically scattered 127I ions were detected with the present ToF system. /; /* Experimental Method: - Time-of-flight (To measure fission fragment velocities) - Beam current integrated (The average beam current was 500-800 nA.) RCT=232TH(P,FISSN); PHQ=ENGY-SPEC'58'; /* '58' total kinetic energy distribution (A=130) */ INC-ENGY-LAB=14.7MEV; /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,9; INC-ENGY-LAB=14.7MEV; EMT=X'59'; /* '59' Fission fragments */ A=130; DELTA-TOT-KIN-ENGY=0.5MEV'60'; /* '60' Data-point reader uncertainty */ DELTA-COUNTS=0.5ARB'61'; /* '61' Data-point reader uncertainty */ /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; TOT-KIN-ENGY'62' COUNTS'63' (MEV) (ARB) 111.6 1.3 114.2 1.2 116.5 1.2 118.4 1.1 121. 1. 123.6 0.9 126.5 1.5 128.8 2.8 131.4 2.7 134. 3.3 136.2 3.2 137.9 5.2 139.8 9.8 142.1 11. 144.1 13. 145.7 19.6 148. 24.8 149.7 28.8 152.7 34.7 154.7 44.6 156.3 49.9 158.1 63.2 160.3 57.8 162.4 79.7 164.1 84.4 166.1 101. 168.3 94.9 170.3 91.5 171.8 87.4 174.8 97.4 176.4 88.6 178.7 89.2 179.8 71.2 183. 65.8 184.1 45.1 187.4 43.6 187.9 32.3 189.8 22.9 192. 14.2 194.2 10.8 196.1 4.7 198.4 3.3 \END; /*===================================================================*/ |