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| /*===================================================================*/
/* NRDF D1888 Data No.2 */
/*===================================================================*/
/* Bibliography */
/*===================================================================*/
\\BIB,2;
D#=D1888;
TITLE=/ alpha-decays of neutron-deficient americium isotopes /;
PURPOSE=/ To present new and improved data on the alpha-decay of
233Am, 234Am, 235Am, 236Am, and 229Np (alpha-decay daughter of
233Am) /;
ATH=(M.SAKAMA'1', M.ASAI'2', K.TSUKADA'2', S.ICHIKAWA'2',
I.NISHINAKA'2', Y.NAGAME'2', H.HABA'3', S.GOTO'4', M.SHIBATA'5',
K.KAWADE'6', Y.KOJIMA'7', Y.OURA'8', M.EBIHARA'8',
H.NAKAHARA'8');
INST-ATH=(2JPNTKS'1', 2JPNJAE'2', 2JPNIPC'3', 2JPNNII'4', 2JPNNAG'5',
2JPNNAG'6', 2JPNHIR'7', 2JPNTMU'8');
/* '1' Department of Radiologic Science and Engineering, School of
Health Sciences */
/* '2' Advanced Science Research Center */
/* '3' Cyclotron Center */
/* '4' Department of Chemistry */
/* '5' Radioisotope Research Center */
/* '6' Department of Energy Engineering and Science */
/* '7' Graduate School of Engineering */
/* '8' Department of Chemistry */
REF=PR/C;
VLP=69(2004)014308;
RCTS=(235U(6LI,5*N)236AM, 233U(6LI,4*N)235AM, 233U(6LI,5*N)234AM,
233U(6LI,6*N)233AM);
PHQS=XSECTN;
/*===================================================================*/
/* Experimental Conditions */
/*===================================================================*/
\\EXP,2;
/* 2004-04-14 : Compiled, Kc + On */
PHQ=XSECTN;
ENR=X%;
CHM=X'9';
/* '9' UO2(NO3)2 */
BAC=AL'10';
/* '10' UO2(NO3)2 in 2-propanol is electrodeposited onto aluminum
backing foil. */
THK-BAC=0.9MG/CM**2;
POL-TGT=0%;
ALGN-TGT=0%;
ACC=VDGT;
INST-ACC=2JPNJAE;
BEAM-INTNSTY=250[340PNA;
POL-PRJ=0%;
ANT-COINC=NO;
DET-SYS=(SI'11',GE(LI)'12');
/* '11' To measure alpha particles with efficiency of 85%. Energy
resolution is about 45 keV. */
/* '12' To measure X rays following EC decay. Coaxial type. FWHM=
0.66 keV at 122 keV gamma-ray. */
/* Experimental Method:
- Stacked target irradiation (A stack of 21 targets set in a
multiple-target chamber with 5 mm spacing)
- Collection by He jet (Products attached to the PbI2 aerosol
clusters were swept out of the target chamber)
- On-line mass separation (JAERI-ISOL. Mass resolution of A/Delta
A is about 850 at the mass number A=208 [S. Ichikawa et al.,
Nucl. Instrum. Methods B187(2002)548].)
/* Analysis:
- Decay curve analysis
/* Related references
- J.Guo et al., ZP/A, 355(1996)111.
Reference with which data agress (Half-life of 235Am is 15+-5 min
in this work.)
RCT=233U(6LI,4*N)235AM;
THK-TGT=0.05[0.13MG/CM**2;
INC-ENGY-LAB=34[42MEV;
DET-PARTCL=(ALPHA'15',XRAY'16');
/* '15' Alpha from 235Am. Decay data in present experiment. T1/2=
10.7+-0.7 min and intensity I=(4.0+-0.5)e-3. */
/* '16' X-ray from 235Am. Decay data in present experiment. T1/2=
9.5+-1.2 min. */
COINC=X'17';
/* '17' No alpha-gamma coincidence event was observed. */
DET-SYS=GE'18';
/* '18' Used for alpha-gamma and gamma-gamma coincidence
measurements. */
/* Comment to data: Comment by authors: No alpha-gamma coincidence
event was observed. This result suggests that the level fed by the
6457 keV alpha transition is either the ground state of 231Np or a
low lying level that decays via internal conversion. */
/*===================================================================*/
/* Descriptive Parameters */
/*===================================================================*/
\\DATA,2;
RSD=235AM;
/*===================================================================*/
/* Data Table */
/*===================================================================*/
\DATA;
XSECTN DELTA-XSECTN
(UB) (UB)
31 +-12
\END;
/*===================================================================*/
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