/*===================================================================*/ /* NRDF D1659 Data No.8 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,8; 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,8; /* 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'52'; /* '52' total kinetic energy distribution (A=128) */ INC-ENGY-LAB=14.7MEV; /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,8; INC-ENGY-LAB=14.7MEV; EMT=X'53'; /* '53' Fission fragments */ A=128; DELTA-TOT-KIN-ENGY=0.5MEV'54'; /* '54' Data-point reader uncertainty */ DELTA-COUNTS=0.5ARB'55'; /* '55' Data-point reader uncertainty */ /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; TOT-KIN-ENGY'56' COUNTS'57' (MEV) (ARB) 110.5 0.4 112.1 0.4 114.7 0.4 117.3 0.8 118.3 0.4 120.2 0.3 123.8 0.3 125.5 1.5 127.1 1.5 130. 1.9 132.3 3.4 134. 5.8 135.9 4.6 138.2 7. 140.5 8.2 142.2 13.3 144.5 12.5 146.6 19.6 148.3 26.7 149.6 29.9 152.5 46.1 153.9 59.2 156.5 54.8 157.8 55.2 160.6 67.9 162.1 64.3 164.4 60.7 166.6 79.3 168.5 73.8 170.1 71. 171.9 63.5 174. 50.8 176.8 67. 178. 53.9 180.6 52.3 182.6 36.1 184.5 27.7 187. 24.9 189.5 16.6 191.4 10.3 192.7 8.3 194.6 4.3 196.5 5.5 199.4 3.1 \END; /*===================================================================*/ |