/*===================================================================*/ /* NRDF D1887 Data No.1 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,1; D#=D1887; TITLE=/ Half-life of the electron capture decaying isotope 236Am /; PURPOSE=/ To determine the half-life of the neutron deficient americium isotope 236Am /; ATH=(K.TSUKADA'1', S.ICHIKAWA'1', Y.HATSUKAWA'1', I.NISHINAKA'1', K.HATA'1', Y.NAGAME'1', Y.OURA'2', T.OHYAMA'2', K.SUEKI'2', H.NAKAHARA'2', M.ASAI'3', Y.KOJIMA'3', T.HIROSE'3', H.YAMAMOTO'3', K.KAWADE'3'); INST-ATH=(2JPNJAE'1', 2JPNTMU'2', 2JPNNAG'3'); /* '2' Department of Chemistry */ /* '3' Department of Energy Engineering and Science */ REF=PR/C; VLP=57(1998)2057; RCTS=235U(6LI,5*N)236AM; PHQS=XSECTN; /*===================================================================*/ /* Experimental Conditions */ /*===================================================================*/ \\EXP,1; /* 2004-04-15 : Compiled, Kc + On */ /* Related references - H.L.Hall, LBL-, 27878(1989). Reference with which data agress (Half-life of 236Am obtained by 237Np(3He,4n) is 3.73+-0.28 min in this work.) PHQ=XSECTN; ENR=93%; CHM=ELM; PHYS-FORM=SLD; THK-TGT=0.2MG/CM**2; BAC=AL'4'; /* '4' Electrodeposited */ THK-BAC=0.8MG/CM**2; POL-TGT=0%; ALGN-TGT=0%; ACC=VDGT; INST-ACC=2JPNJAE; INC-ENGY-LAB=46[50MEV; BEAM-INTNSTY=100[300PNA; CHRG-INC-ION=3+; POL-PRJ=0%; DET-PARTCL=(XRAY'5',XRAY'6'); /* '5' X-ray from 236Am. Decay data for Pu K(alpha 1) X-ray in present experiment. T1/2= 4.4+-1.0 min. */ /* '6' X-ray from 236Am. Decay data for Pu K(alpha 2) X-ray in present experiment. T1/2= 4.5+-1.5 min. */ COINC=NO; ANT-COINC=NO; DET-SYS=(GE(LI)'7',HPGE'8'); /* '7' Planartype Ge detector (FWHM= 0.57 keV at 122 keV) */ /* '8' Coaxial n-type Ge detector (FWHM= 1.8 keV at 1.33 MeV) */ /* Experimental Method: - Stacked target irradiation (Stack of fifteen 235U targets was bombarded.) - Collection by He jet (Products attached to KCL clusters were swept out of the target chamber with He gas) - On-line mass separation (JAERI-ISOL [S. Ichikawa et al., Nucl. Instrum. Meth. A374(1996)330]. Mass resolution A/Delta-A is about 600 for 221Fr.) /* Analysis: - Decay curve analysis (Decay curves for Pu K(alpha 1) and Pu K(alpha2) X-ray. Evaluated half-life of 236Am is 4.4+-0.8 min.) RCT=235U(6LI,5*N)236AM; /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,1; RSD=236AM; /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; XSECTN'9' (UB) 70 \END; /*===================================================================*/ |