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/* 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;
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