/*===================================================================*/ /* NRDF D1852 Data No.5 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,5; D#=D1852; TITLE=/Mass yield distributions in proton-induced fission of 248Cm/; PURPOSE=/To extend the systematic study of the mass yield distribution in low-energy proton-induced fission of actinides as functions of Z and N of the fissioning nucleus/; ATH=(Z.QIN'1', K.TSUKADA'1', N.SHINOHARA'1', Y.L.ZHAO'1,2', I.NISHINAKA'1', Y.HATSUKAWA'1', S.ICHIKAWA'1', K.HATA'1', Y.NAGAME'1'); INST-ATH=(2JPNJAE'1', 2JPNTMU'2'); /* '2' Department of Chemistry */ REF=RCA; VLP=84(1999)115; RCTS=(248CM(P,FISSN)156SM, 248CM(P,FISSN)155SM, 248CM(P,FISSN)153SM, 248CM(P,FISSN)151PM, 248CM(P,FISSN)149ND, 248CM(P,FISSN)147ND, 248CM(P,FISSN)143CE, 248CM(P,FISSN)142LA, 248CM(P,FISSN)141CE, 248CM(P,FISSN)141BA, 248CM(P,FISSN)140BA, 248CM(P,FISSN)139BA, 248CM(P,FISSN)138CS, 248CM(P,FISSN)136CS, 248CM(P,FISSN)135I, 248CM(P,FISSN)133I, 248CM(P,FISSN)133TE, 248CM(P,FISSN)132TE, 248CM(P,FISSN)131I, 248CM(P,FISSN)129SB, 248CM(P,FISSN)128SN, 248CM(P,FISSN)127SB, 248CM(P,FISSN)127SN, 248CM(P,FISSN)126SB, 248CM(P,FISSN)117CD, 248CM(P,FISSN)115CD, 248CM(P,FISSN)113AG, 248CM(P,FISSN)112PD, 248CM(P,FISSN)107RH, 248CM(P,FISSN)105RU, 248CM(P,FISSN)104TC, 248CM(P,FISSN)103RU, 248CM(P,FISSN)99MO, 248CM(P,FISSN)97ZR, 248CM(P,FISSN)95ZR, 248CM(P,FISSN)93Y, 248CM(P,FISSN)92SR, 248CM(P,FISSN)91SR, 248CM(P,FISSN)88KR, 248CM(P,FISSN)87KR); PHQS=FISSN-XSECTN; /*===================================================================*/ /* Experimental Conditions */ /*===================================================================*/ \\EXP,5; /* 2003-11-05 : Converted, Data converted from EXFOR O0733 */ RTY=FISSN; PHQ=FISSN-XSECTN; ENR=X%'3'; /* '3' Isotopic composition was determined by alpha-particle spectrometry with a silicon surface barrier detector: 248Cm: 96.42%, 246Cm: 3.57%, 244Cm: 0.012%, 242Cm: <0.0001% and a few actinide impurities of 238Pu and 241Am */ CHM=ELM'4'; /* '4' To remove the impurities of plutonium and some non-radioactive materials, especially iron and silicon which would disturb the electrodeposition of curium, an anion-exchange separation was carried out for purification. */ PHYS-FORM=SLD; THK-TGT=0.05MG/CM**2'5'; /* '5' Thickness estimated by alpha-ray spectrometry */ BAC=AL'6'; /* '6' Target was convered with an aluminium foil down stream to collect fission products. */ THK-BAC=5.4MG/CM**2; POL-TGT=0%; ALGN-TGT=0%; ACC=VDGT; INST-ACC=2JPNJAE; DELTA-INC-ENGY-LAB=XKEV'7'; /* '7' Uncertainty of energy of proton beams was estimated to be about 150 to 200 keV. */ BEAM-INTNSTY=[0.5UA'8'; /* '8' Beam currents were monitored with a Faraday cup connected to a current integrator. Uncertainty of intensity of the proton beams was estimated to be about 6%. */ POL-PRJ=0%; COINC=NO; ANT-COINC=NO; MONTR-RCT=/ 65CU(P,N)65ZN /; /* Experimental Method: - Beam current integrated (Beam currents were monitored with a Faraday cup connected to a current integrator.) - Activation (Proton bombardments were carried out with the incident energies of 20 and 13 MeV for 1 to 1.5 hour to ensure production of sufficient activities of fission products.) - Gamma ray spectrometry (Formation cross sections of each nuclide were determined by gamma-ray spectrometry, The nuclear properties of fission products used in this work are listed in Table 1.) /* Analysis: - Decay curve analysis RCT=248CM(P,FISSN)149ND; DET-PARTCL=GAMMA'21'; /* '21' Delayed gamma (211.3 keV) from 149Nd (Half-life=1.73 hour) is measured. Abundance of this decay mode is 0.259. */ /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,5; EMT=GAMMA'22'; /* '22' Delayed Gammas */ RSD=(149ND,65ZN); /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; INC-ENGY-LAB XSECTN DELTA-XSECTN'23' (MEV) (MB) (MB) 10.5 1.8 +-0.4 12.1 2.7 +-0.4 13. 6.5 +-0.9 14.8 8.9 +-1.1 15.9 13. +-2. 18.1 24. +-5. 20. 18. +-2. \END; /*===================================================================*/ |