/*===================================================================*/ /* NRDF D1905 Data No.35 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,35; D#=D1905; TITLE=/ Partition of total excitation energy between fragment pairs in asymmetric and symmetric fission modes /; PURPOSE=/ To reveal how the degrees of fragment deformation at scission are correlated to the different scission configurations of the two fission modes and how the total excitation energies are shared between fragment pairs in each fission mode /; ATH=(I.NISHINAKA'1', Y.NAGAME'1', H.IKEZOE'1', M.TANIKAWA'2', Y.L.ZHAO'3', K.SUEKI'4', H.NAKAHARA'1,5'); INST-ATH=(2JPNJAE'1', 2JPNTOK'2', 3CPRIHP'3', 2JPNTSU'4', 2JPNTMU'5'); /* '2' School of Science */ /* '4' Radioisotope Center */ /* '5' Department of Chemistry */ REF=PR/C; VLP=70(2004)014609; RCTS=232TH(P,FISSN); PHQS=(FISSN-YLD, AVER-KIN-ENGY, N-MLT, ENGY-SPEC, ENGY-SPEC'6', DATA'7', DATA'8', DATA'9', DATA'10'); /* '6' Total kinetic energy distribution */ /* '7' Average excitation energy of a fragment for the asymmetric fission mode */ /* '8' Average excitation energy of a fragment for the symmetric fission mode */ /* '9' Total average excitation energy of fragment pairs for the asymmetric fission mode */ /* '10' Total average excitation energy of fragment pairs for the symmetric fission mode */ /*===================================================================*/ /* Experimental Conditions */ /*===================================================================*/ \\EXP,35; /* 2004-09-17 : Compiled, Kc + On */ CHM=X'11'; /* '11' Thorium fluoride */ PHYS-FORM=SLD; THK-TGT=0.110MG/CM**2; BAC=C; THK-BAC=0.020MG/CM**2; POL-TGT=0%; ALGN-TGT=0%; ACC=VDGT; INST-ACC=2JPNJAE; INC-ENGY-LAB=12MEV; BEAM-INTNSTY=[300PNA; POL-PRJ=0%; DET-PARTCL=X'12'; /* '12' Fission Fragments */ COINC=NO; ANT-COINC=NO; DET-SYS=(MCPLT'13',SI'14',MCPLT'15',PPAC'16',TOF'17'); /* '13' Start and stop counter of ToF1 to measure velocity of fragments at 50.5 deg */ /* '14' To measure kinetic energies of fission fragments at 50.5 deg with solid angle of 0.167 msr and energy resolution of 3.3 MeV (FWHM) */ /* '15' Counter of ToF2 to measure velocity of complementary fragments at -128 deg */ /* '16' Counter of ToF2 to measure velocity of complementary fragments at -128 deg */ /* '17' To measure velocities of fission fragments, Length and time resolution are 56.5 (43.4) cm and 650 (970) ps for ToF1 (ToF2). */ CALB-DET=/ Flight time and energy were calibrated by the emitted and recoiling nuclei from elastic scattering of 240 MeV 127I beams on natAg, natIn, 209Bi /; /* Experimental Method: - Time-of-flight (To measure velocities of fission fragments, Length and time resolution are 56.5 (43.4) cm and 650 (970) ps for ToF1 (ToF2).) /* Correction to data: A new correction procedure was proposed and applied to observed fission data affected by instrumental fluctuations in measurments of flight time and kinetic energies of secondary fragments. See Sect. IIIB of the reference for the procedure of correction. */ RCT=232TH(P,FISSN); RTY=FISSN; PHQ=N-MLT; /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,35; INC-ENGY-LAB=12MEV; A-MIN=128'173'; /* '173' Lower limit of primary fragment mass numbers */ A-MAX=129'174'; /* '174' Upper limit of primary fragment mass numbers */ /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; TOT-KIN-ENGY'175' N-MLT'176' N-MLT'177' (MEV) (NODIM) (NODIM) 146.5 4.65 X 148.5 3.66 4.02 150.5 3.39 3.9 152.5 2.74 3.75 154.5 2.64 3.59 156.5 2.9 3.44 158.5 2.98 3.33 160.5 2.83 3.11 162.5 2.62 2.86 164.5 2.24 2.61 166.5 2.6 2.32 168.5 1.75 2.04 170.5 1.87 1.71 172.5 1.83 1.44 174.5 1.77 1.26 176.5 1.23 1.08 178.5 1.23 0.94 180.5 1 0.79 182.5 1.2 0.68 184.5 1.03 0.58 186.5 0.58 0.49 188.5 0.64 0.39 190.5 1.02 0.29 192.5 1.12 0.19 194.5 X 0.1 \END; /*===================================================================*/ |