摘要
The cross-section for the~(93)Nb(n,2n)~(92g)Nb reaction has been measured at the neutron energy of 14.6 Me V using neutron activation and accelerator mass spectrometry(AMS)determination of the long-lived product nuclide~(92g)Nb.The neutron energy was generated from the D+T neutron source at the China Institute of Atomic Energy(CIAE).The neutron flux was monitored by measuring the activity of~(92m)Nb produced in the competing reaction channel of~(93)Nb(n,2n)~(92m)Nb.At the neutron energy of 14.6 MeV,the~(93)Nb(n,2n)~(92g)Nb reaction cross-section of(736±220)mb was obtained for the first time.
The cross-section for the~(93)Nb(n,2n)~(92g)Nb reaction has been measured at the neutron energy of 14.6 Me V using neutron activation and accelerator mass spectrometry(AMS)determination of the long-lived product nuclide~(92g)Nb.The neutron energy was generated from the D+T neutron source at the China Institute of Atomic Energy(CIAE).The neutron flux was monitored by measuring the activity of~(92m)Nb produced in the competing reaction channel of~(93)Nb(n,2n)~(92m)Nb.At the neutron energy of 14.6 MeV,the~(93)Nb(n,2n)~(92g)Nb reaction cross-section of(736±220)mb was obtained for the first time.
引文
1 Translation of selected papers published in nuclear constants1,INDC(CCP)-275/L,IAEA,VIENNA,(1987)5-16
2 He Guozhu,He Ming,Zhou Zuying et al,Nuclear Instruments and Methods in Physics Research B,294:132-135(2013)
3 R.B.Firestone,V.S.Shirley,Table of Isotopes,8thedition,(New York:John Wiley&Sons,1996)
4 Y.E.Kozur,G.A.Prokopets,Radioactive Decay of Unbound States of Niobium in Reactions Induced by Fast Neutrons,Yadernaya Fizika,26(5):927(1977)
5 A.A.Lychagin,V.A.Vinogradov,O.T.Grudzevich,B.V.Devkin,G.V.Kotel‘nikova,V.I.Plyaskin,and O.A.Sal‘nikov,Measurement and analysis of the neutron emission spectrum arising at the 14 Me V neutron bombardment of niobium,Fiz.-Energ Institut,Obninsk Reports;No.1385(1983)
6 E.Holub and N.Cindro,J.Phys.G:Nucl.Phys.,2:405(1976)
7 D.Hermsdorf,S.Sassonoff,D.Seeliger,and K.Seidel,Journal of Nuclear Energy,27:747(1973)
8 M.Haring,H.Vonach,and E.J.Feicht,Zeitschrift fuer Physik,244:352(1971)
9 D.S.Mather,P.F.Bampton,R.E.Coles,G.James,and P.J.Nind,Measurement of(n,2n)cross sections for incident energies between 6 and 14 Me V,R,AWRE-O-72/72,7211
10 J.Frehaut,G.Mosinski,Measurement of the(n,2n)CrossSections for56Fe,59Co,89Y,169Tm,175Lu,181Ta,197Au,209Bi,238U and of the(n,3n)Cross-Section for238U from Threshold to 15 Me V Incident Neutron Energy,Centre d‘Etudes Nucleaires,Saclay Reports;No.4627(1974)
11 L.R.Veeser,E.D.Arthur,and P.G.Young,Physical Review,Part C,Nuclear Physics,16:1792(1977)
12 A.A.Filatenkov,S.V.Chuvaev,V.N.Aksenov et al,INDC(CCP)-252,(Vienna:IAEA,1999)