/*===================================================================*/ /* NRDF D1851 Data No.1 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,1; 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,1; /* 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'15'; /* '15' 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,1; INC-ENGY-LAB=13MEV; EMT=FF; A=126; /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; TOT-KIN-ENGY'16' COUNTS'17' DATA1'18' DATA2'19' (MEV) (NODIM) (NODIM) (NODIM) 132. 0.98636 1.6148 X 134. 1.973 2.6463 X 136. 2.9597 4.2002 X 138. 9.8675 6.4563 X 140. 6.9078 9.6118 X 142. 16.777 13.859 X 144. 22.701 19.352 X 146. 21.715 26.172 0.15012 148. 28.628 34.28 0.26943 150. 39.49 43.485 0.46682 152. 44.43 53.424 0.78079 154. 60.27 63.567 1.2607 156. 69.25 73.253 1.965 158. 82.757 81.755 2.9566 160. 98.962 88.369 4.2945 162. 114.58 92.508 6.0216 164. 117.55 93.79 8.1508 166. 83.968 92.095 10.651 168. 102.75 87.58 13.435 170. 110.66 80.663 16.36 172. 95.963 71.951 19.231 174. 74.98 62.159 21.822 176. 68.186 52.007 23.905 178. 69.178 42.142 25.28 180. 64.241 33.073 25.807 182. 56.338 25.137 25.432 184. 52.389 18.504 24.194 186. 26.69 13.192 22.218 188. 26.692 9.1085 19.697 190. 16.807 6.0909 16.857 192. 11.864 3.9447 13.927 194. 9.8873 2.4743 11.107 196. 4.944 1.503 8.5513 \END; /*===================================================================*/ |