|
| /*===================================================================*/
/* NRDF D1851 Data No.2 */
/*===================================================================*/
/* Bibliography */
/*===================================================================*/
\\BIB,2;
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,2;
/* 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'20';
/* '20' 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,2;
INC-ENGY-LAB=13MEV;
EMT=FF;
A=128;
/*===================================================================*/
/* Data Table */
/*===================================================================*/
\DATA;
TOT-KIN-ENGY'21' COUNTS'22' DATA1'23' DATA2'24'
(MEV) (NODIM) (NODIM) (NODIM)
136. 8.8776 4.5688 0.01147
138. 9.8648 7.0204 0.02469
140. 8.8797 10.446 0.05129
142. 12.827 15.053 0.10281
144. 22.695 21.006 0.19889
146. 27.633 28.386 0.37127
148. 33.557 37.147 0.66877
150. 33.559 47.075 1.1624
152. 51.329 57.771 1.9497
154. 47.385 68.656 3.1557
156. 85.008 79.013 4.9285
158. 89.9 88.059 7.4276
160. 112.57 95.039 10.802
162. 118.5 99.33 15.158
164. 108.63 100.53 20.527
166. 130.3 98.536 26.822
168. 147.3 93.525 33.82
170. 150.98 85.964 41.15
172. 152.13 76.516 48.315
174. 135.35 65.954 54.738
176. 128.44 55.053 59.844
178. 112.64 44.502 63.133
180. 96.837 34.836 64.268
182. 65.222 26.407 63.133
184. 61.272 19.385 59.844
186. 72.149 13.781 54.738
188. 59.303 9.4869 48.315
190. 38.55 6.3245 41.15
192. 30.644 4.0831 33.82
194. 19.771 2.5527 26.822
196. 21.75 1.5454 20.527
198. 12.853 0.90608 15.158
200. 11.865 0.51444 10.802
202. 3.955 0.28284 7.4276
204. 4.944 0.1506 4.9285
\END;
/*===================================================================*/
|