ENTRY M0271 20240329 M130M027100000001 SUBENT M0271001 20240329 M130M027100100001 BIB 11 37 M027100100002 TITLE Absolute cross section of the reaction M027100100003 63Cu(gamma,n)62Cu for Lithium gamma rays. M027100100004 AUTHOR (S.Yasumi,M.Yata,K.Takamatsu,A.Masaike,Y.Masuda) M027100100005 INSTITUTE (2JPNKTO,2JPNOSP) M027100100006 FACILITY (CCW) M027100100007 REFERENCE (J,JPJ,15,1913,1960) M027100100008 METHOD (EXTB,SITA) M027100100009 DETECTOR (BF3) M027100100010 INC-SOURCE (MPH=(3-LI-7(P,G)4-BE-8)) M027100100011 ERR-ANALYS (ERR-S) Statistical errors are presented. M027100100012 COMMENT The cross section of the reaction Cu-63(g,n)Cu-62 for M027100100013 Li gamma rays was measured in order to discover some M027100100014 causes of the existing discrepancy between values M027100100015 measured by bremsstrahlung and by nuclear gamma M027100100016 rays. M027100100017 Experimental procedures used in this experiment were M027100100018 much improved as compared with those used in previous M027100100019 measurements performed in laboratory for the same M027100100020 purpose. M027100100021 The present results were as follows: M027100100022 sigma(Li-g)=62(4) mb (for Li gamma rays), and M027100100023 sigma(Eg=17.6)=76(5) mb for 17.6 MeV gamma-rays. M027100100024 This value is about 30% lower than the average cross M027100100025 section value determined by photon difference method M027100100026 in several bremsstrahlung experiments. M027100100027 Therefore, we suggest that the modified spectrum M027100100028 method proposed by Penfold and Leiss might eliminate M027100100029 not only the above-mentioned discrepancy but also the M027100100030 discrepancy between theoretical and experimental M027100100031 values in the form sig**(-2), as pointed out by M027100100032 Levinger. M027100100033 HISTORY (19880704C) M027100100034 (19910202A) Corrected by V.Varlamov, V.McLane. M027100100035 (20081110A) Corrected by V.Varlamov: REFERENCE, M027100100036 FACILITY, REACTION, lowercase. M027100100037 (20240329U) Corrected by V.Varlamov: lowercase, M027100100038 INC-SOURCE, COMMENT, STATUS. M027100100039 ENDBIB 37 0 M027100100040 NOCOMMON 0 0 M027100100041 ENDSUBENT 40 0 M027100199999 SUBENT M0271002 20240329 M130M027100200001 BIB 3 4 M027100200002 REACTION (29-CU-63(G,N)29-CU-62,,SIG) M027100200003 STATUS (TABLE,,S.Yasumi+,J,JPJ,15,1913,1960) M027100200004 Data from pages 1913 and 1918. M027100200005 HISTORY (20240329U) Corrected by V.Varlamov: STATUS. M027100200006 ENDBIB 4 0 M027100200007 NOCOMMON 0 0 M027100200008 DATA 4 1 M027100200009 EN-MIN EN-MAX DATA ERR-S M027100200010 MEV MEV MB MB M027100200011 14.8 17.6 62.0 4.0 M027100200012 ENDDATA 3 0 M027100200013 ENDSUBENT 12 0 M027100299999 SUBENT M0271003 20240329 M130M027100300001 BIB 3 4 M027100300002 REACTION (29-CU-63(G,N)29-CU-62,,SIG) M027100300003 STATUS (TABLE,,S.Yasumi+,J,JPJ,15,1913,1960) M027100300004 Data from pages 1913 and 1918. M027100300005 HISTORY (20240329U) Corrected by V.Varlamov: STATUS. M027100300006 ENDBIB 4 0 M027100300007 NOCOMMON 0 0 M027100300008 DATA 3 1 M027100300009 EN DATA ERR-S M027100300010 MEV MB MB M027100300011 17.6 76.0 5.0 M027100300012 ENDDATA 3 0 M027100300013 ENDSUBENT 12 0 M027100399999 ENDENTRY 3 0 M027199999999