/*===================================================================*/ /* NRDF D1662 Data No.5 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,5; D#=D1662; TITLE=/Nuclear fission of neutron-deficient protactinium nuclides/; PURPOSE=/To study the degree of the contribution of asymmetric massdivision in the low energy fission of neutron-deficient lightactinides by observing yields of fission products in detail/; ATH=(I.NISHINAKA'1', Y.NAGAME'1', K.TSUKADA'1', H.IKEZOE'1', K.SUEKI'2', H.NAKAHARA'2', M.TANIKAWA'3', T.OHTSUKI'4'); INST-ATH=(2JPNJAE'1', 2JPNTMU'2', 2JPNTOK'3', 2JPNTOH'4'); /* '2' Faculty of Science */ /* '3' School of Science */ /* '4' Laboratory of Nuclear Science */ REF=PR/C; VLP=56(1997)891; RCTS=209BI(16O,FISSN), 209BI(18O,FISSN); PHQS=(DATA'5', DATA'6', A-DSTRN'7', A-DSTRN'8', A-DSTRN'9', A-DSTRN'10', A-DSTRN'11'); /* '5' velocity distributions of fission fragments */ /* '6' kinetic energy distribution */ /* '7' Secondary (post neutron emission) fragment mass distribution /* '8' Primary (pre neutron emission) fragment mass distribution */ /* '9' Cummulative mass yields of secondary fragments */ /* '10' Independent mass yields of secondary fragments */ /* '11' Independent element yields of secondary fragments */ /*===================================================================*/ /* Experimental Conditions */ /*===================================================================*/ \\EXP,5; /* 2003-08-19 : Converted, Data converted to EXFOR E1662 */ RTY=FISSN; ENR=X%; CHM=ELM; PHYS-FORM=SLD; POL-TGT=0%; ALGN-TGT=0%; DET-PARTCL=X'12'; /* '12' Fission Fragments */ COINC=NO; ANT-COINC=NO; RCT=209BI(18O,FISSN); PHQ=DATA'41'; /* '41' kinetic energy distribution */ THK-TGT=[0.04MG/CM**2; BAC=C; THK-BAC=0.01MG/CM**2; ACC=VDGT; INST-ACC=2JPNJAE; INC-ENGY-LAB=85MEV; BEAM-INTNSTY=[100PNA; DET-SYS=(MCPLT'42',SSD'43',PPAC'44'); /* '42' Used as ToF telescope at theta(lab)=60 deg. */ /* '43' To measure kinetic energies of fission fragments, 0.3 msr /* '44' Set at theta(lab)=99 deg. Solid angle was 80 msr. */ CALB-DET=/ Calibrations of the time for the ToF system and the energy for the SSD were performed by measuring the elastically scattered 16O and 18O ions from a 209Bi target, and also the particles recoiling out from thin targets, natural Ag, natural In, natural Sb by bombardment of the 350 MeV 127I beam. /; /* Experimental Method: - Time-of-flight (to obtain velocity distribution) /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,5; INC-ENGY-LAB=85MEV; EMT=X'45'; /* '45' Fission fragments */ /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; ENGY-EMT'46' YLD DELTA-YLD'47' (MEV) (%) (%) 40.5 0.025 +-1.000E-02 42.5 5.400E-02 +-1.400E-02 44.5 1.080E-01 +-2.000E-02 46.5 0.191 +-0.026 48.5 0.314 +-0.034 50.5 0.488 +-0.042 52.5 0.643 +-0.048 54.5 1.116 +-0.064 56.5 1.293 +-0.068 58.5 2.045 +-0.086 60.5 2.547 +-0.096 62.5 3.045 +-0.105 64.5 3.501 +-0.112 66.5 4.465 +-0.127 68.5 4.953 +-0.134 70.5 5.491 +-0.141 72.5 6.094 +-0.148 74.5 6.582 +-0.154 76.5 6.68 +-0.155 78.5 6.521 +-0.154 80.5 6.21 +-0.15 82.5 6.011 +-0.147 84.5 5.578 +-0.142 86.5 4.978 +-0.134 88.5 4.61 +-0.129 90.5 3.53 +-0.113 92.5 3.056 +-0.105 94.5 2.587 +-0.097 96.5 2.168 +-0.089 98.5 1.618 +-0.076 100.5 1.232 +-0.067 102.5 0.979 +-0.059 104.5 0.509 +-0.043 106.5 0.444 +-0.04 108.5 0.188 +-0.026 110.5 0.072 +-0.016 112.5 0.051 +-1.400E-02 114.5 2.200E-02 +-8.850E-03 \END; /*===================================================================*/ |