/*===================================================================*/ /* NRDF D1851 Data No.4 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,4; D#=D1851; TITLE=/ Characteristics of binary scission configurations in proton-induced fission of actinides /; PURPOSE=/ To clarify the correlation between mass yield distributions and scission configurations in low-energy proton-induced fission of actinides, and to elucidate how the bimodal properties vary as a function of fissioning nuclei in wide range of actinide fission /; ATH=(Y.L.ZHAO'1,3', T.OHTSUKI'2', Y.NAGAME'3', I.NISHINAKA'3', K.TSUKADA'3', S.ICHIKAWA'3', H.IKEZOE'3', Y.HATSUKAWA'3', K.HATA'3', M.TANIKAWA'4', Z.QIN'3', K.SUEKI'1', Y.OURA'1', H.KUDO'5', H.NAKAHARA'1'); INST-ATH=(2JPNTMU'1', 2JPNTOH'2', 2JPNJAE'3', 2JPNTOK'4', 2JPNNII'5'); /* '1' Department of Chemistry */ /* '2' Laboratory of Nuclear Science */ /* '4' Department of Chemistry */ /* '5' Department of Chemistry */ REF=JRN; VLP=239(1999)113; RCTS=238U(P,FISSN), 232TH(P,FISSN), 244PU(P,FISSN); PHQS=(ENGY-SPEC'6', FISSN-YLD); /* '6' Total kinetic energy distribution */ /*===================================================================*/ /* Experimental Conditions */ /*===================================================================*/ \\EXP,4; /* 2003-11-04 : Converted, Data converted from EXFOR O0699 */ /* Related references - Y.Nagame et al., PL/B, 387(1996)26. (Detail of experimental procedure and two-Gaussian analysis) - Y.Nagame et al., JRN, 239(1999)97. RTY=FISSN; /* Additional results shown but not compiled - Comparison with calculated values (Two-gaussian analysis. The elongation properties of nuclei at scission in a wide range of actinides fissions are studied. The results suggest that the compact and the elongated scission configurations in light actinides fission smoothly change to the scission properties of the symmetric and the asymetric modes in heavy actinides fission.) - Distance of two charge centers at scission configurations evaluated from the total kinetic energy of the fragment mass for 13 MeV p+238U fission. See Fig.2 of this reference. CHM=ELM; PHYS-FORM=SLD; POL-TGT=0%; ALGN-TGT=0%; ACC=VDGT; INST-ACC=2JPNJAE; POL-PRJ=0%; DET-PARTCL=X'7'; /* '7' Fission fragments */ COINC=NO; ANT-COINC=NO; DET-SYS=(MCPLT'8',SBD'9',MCPLT'10',PPAC'11',TOF'12'); /* '8' Used as stop detector of ToF1 telescope placed at theta(lab)=50 deg */ /* '9' Used as stop and energy signals, located behind the ToF1 stop detector */ /* '10' Used as start detector of ToF2 telescope placed at theta(lab)=130 deg */ /* '11' Used as stop detector of ToF2 telescope placed at theta(lab)=130 deg */ /* '12' Flight pathes of two telescopes are 55 cm and 50 cm, respectively. */ SOLID-ANGL=XMSR'13'; /* '13' 0.17 and 32 msr for ToF1 and ToF2, respectively */ ERS-DET=[2.5MEV'14'; /* '14' Overall resolution of kinetic energy. Resolution of mass is about 2.0 u. */ CALB-DET=/ Velocity calibration was performed using the 240 MeV 127I beam to bombard the thin targets (60 micro-gram/cm2 thick), natAg, natIn, 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 (Flight pathes of two telescopes are 55 cm and 50 cm, respectively.) RCT=238U(P,FISSN); PHQ=ENGY-SPEC'30'; /* '30' Total kinetic energy distribution */ THK-TGT=[0.07MG/CM**2; BAC=C; THK-BAC=0.03MG/CM**2; INC-ENGY-LAB=13MEV; /* Analysis: - Decomposition of total kinetic energy (TKE) distribution into low- and high-TKE components was done by using the two-Gaussian analysis, described in detail in [Y.Nagame et al., Phys. Lett. B387(1996)26]. /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,4; INC-ENGY-LAB=13MEV; EMT=FF; A=132; /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; TOT-KIN-ENGY'31' COUNTS'32' DATA1'33' DATA2'34' (MEV) (NODIM) (NODIM) (NODIM) 134. 4.929 2.1326 0.0348 136. 3.9437 3.3732 0.07627 138. 9.8602 5.1662 0.16114 140. 10.848 7.6612 0.32827 142. 15.779 11.001 0.64477 144. 19.727 15.295 1.221 146. 23.675 20.592 2.2295 148. 24.663 26.843 3.925 150. 44.397 33.882 6.6622 152. 66.107 41.41 10.903 154. 74.006 49.006 17.205 156. 81.908 56.155 26.175 158. 120.4 62.307 38.396 160. 136.21 66.939 54.304 162. 158.92 69.635 74.051 164. 178.68 70.142 97.361 166. 183.63 68.412 123.42 168. 199.17 64.607 150.85 170. 206.37 59.08 177.77 172. 219.22 52.311 201.99 174. 256.76 44.849 221.28 176. 282.45 37.232 233.73 178. 260.75 29.928 238.03 180. 244.96 23.294 233.73 182. 247.94 17.555 221.28 184. 216.34 12.811 201.99 186. 190.67 9.0519 177.77 188. 173.89 6.1931 150.85 190. 165.99 4.1028 123.42 192. 126.48 2.6318 97.361 194. 97.83 1.6347 74.051 196. 63.247 0.98313 54.304 198. 48.426 0.57252 38.396 200. 36.569 0.32283 26.175 202. 27.676 0.17626 17.205 204. 14.827 0.09318 10.903 206. 7.908 0.0477 6.6622 208. 6.9201 0.02364 3.925 210. 1.9773 0.01135 2.2295 212. 0.98873 0.00527 1.221 \END; /*===================================================================*/ |