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/* NRDF D1792 Data No.8 */
/*===================================================================*/
/* Bibliography */
/*===================================================================*/
\\BIB,8;
D#=D1792;
TITLE=/ Isomeric yield ratios of 134I and 136I in the proton-, 12C-
and 19F-induced fission of 235U, 237Np and 238U /;
PURPOSE=/ In this experiment, in order to obtain the isomeric yield
ratios of 134(m)I/134(g)I and 136(m)I/136(g)I, short-lived
nuclides of iodine produced by the proton-, 12C- and
19F-induced fission of 235U, 237Np and 238U were
investigated by a radiochemical method. /;
ATH=(N.SHINOHARA'1', K.TSUKADA'1', S.ICHIKAWA'1', M.MAGARA'1',
Y.HATSUKAWA'1');
INST-ATH=(2JPNJAE'1');
REF=RCA;
VLP=88(2000)1;
RCTS=(235U(P,FISSN)134I, 235U(P,FISSN)136I, 237NP(P,FISSN)134I,
237NP(P,FISSN)136I, 238U(P,FISSN)134I, 238U(P,FISSN)136I,
235U(12C,FISSN)134I, 235U(12C,FISSN)136I, 237NP(12C,FISSN)134I,
237NP(12C,FISSN)136I, 238U(12C,FISSN)134I, 238U(12C,FISSN)136I,
235U(19F,FISSN)134I, 235U(19F,FISSN)136I, 237NP(19F,FISSN)134I,
237NP(19F,FISSN)136I, 238U(19F,FISSN)134I, 238U(19F,FISSN)136I);
PHQS=FISSN-YLD;
/*===================================================================*/
/* Experimental Conditions */
/*===================================================================*/
\\EXP,8;
/* 2004-03-19 : Compiled */
RTY=FISSN;
PHQ=FISSN-YLD;
CHM=ELM'2';
/* '2' Chemical purities are 97.7 atom% (235U), 99.3 atom% (238U)
and 100 atom% (237Np). */
PHYS-FORM=SLD;
BAC=X;
POL-TGT=0%;
ALGN-TGT=0%;
ACC=VDGT;
INST-ACC=2JPNJAE;
POL-PRJ=0%;
COINC=NO;
ANT-COINC=NO;
DET-SYS=HPGE'3';
/* '3' Coaxial HPGe detector and multichannel analyzer were used
to measure gamma-rays from the iodine nuclides. The detector
resolution of HPGe detector is 1.73keV (FWHM) at 1.33-MeV
gamma-ray. */
/* Experimental Method:
- Collection by He jet (KCl/He gas-jet recoil-transport system
(HJRT) [K. Tsukada et al., Radiochim. Acta 51, 77 (1990)])
- Chemical separation (Continuous multistage solvent extraction
system SISAK (Short-lived Isotopes Studied by AKUFVE technique
[G. Skarnemark et al., Phys. Scr. 34, 597 (1986)])
- Gamma ray spectrometry
/* Analysis:
- The spin-dependent statistical model (D.G. Madland et al.,
Nucl. Sci. Engl. 64, 859 (1977)) was used to deduce the angular
momenta of the initial fragments.
RCT=235U(12C,FISSN)136I;
THK-TGT=2.7MG/CM**2;
INC-ENGY-LAB=86MEV;
BEAM-INTNSTY=80PNA;
DET-PARTCL=(GAMMA'49',GAMMA'50');
/* '49' Delayed gamma from 136I (ground state) */
/* '50' Delayed gamma from 136I (metastable state) */
/* Derived angular momentum of initial fragment is 11.1+1.2-1.4. */
/*===================================================================*/
/* Descriptive Parameters */
/*===================================================================*/
\\DATA,8;
INC-ENGY-LAB=86MEV;
ENGY-GAMMA=(1313.02KEV'51',381.359KEV'52',1313.02KEV'53');
INTNSTY-GAMMA=(0.667'51',0.998'52',1.000'53');
HALF-LIFE=(83.4SEC'51',46.9SEC'52',46.9SEC'53');
/* '51' Delayed gamma from 136I (ground state) */
/* '52' Delayed gamma from 136I (metastable state) */
/* '53' Delayed gamma from 136I (metastable state) */
CMPD=247CF;
/*===================================================================*/
/* Data Table */
/*===================================================================*/
\DATA;
XSECTN-RATIO'54' DELTA-XSECTN-RATIO'54' DATA1'55'
(NODIM) (NODIM) (MEV)
4.44 +-1.13 57
\END;
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