ENTRY M0270 20160224 M082M027000000001 SUBENT M0270001 20160224 M082M027000100001 BIB 13 53 M027000100002 TITLE Absolute cross sections of the (gamma,n) reaction for M027000100003 Cu-63, Zn-64, and Ag-109. M027000100004 AUTHOR (T.Nakamura,K.Takamatsu,K.Fukunaga,M.Yata,Sh.Yasumi) M027000100005 INSTITUTE (2JPNKTO) University of Kyoto, Japan. M027000100006 REFERENCE (J,JPJ,14,693,1959) M027000100007 REL-REF (M,,P.V.C.Hough,J,PR,80,1069,1950) - Hough's method M027000100008 FACILITY (CCW) Li metal targets of 0.5 mm thick were M027000100009 were bombarded with magnetically analysed protons M027000100010 which were accelerated to 500 keV by a Cockcroft M027000100011 generator and whose intensities were about 50 mu-A ~ M027000100012 100 mu-A M027000100013 METHOD (EXTB,SITA,ACTIV) M027000100014 DETECTOR (GEMUC) The gamma-ray intensities were measured by M027000100015 using an end-window Geiger counter with a 5 mm lead M027000100016 converter on the front and its counting efficiency M027000100017 for Li-p gamma-ray was calibrated by Hough's method M027000100018 - Beta counting at the end of Geiger window M027000100019 (BF3) + parafin for neutron detection. Ra+Be used for M027000100020 neutron detector calibration M027000100021 INC-SOURCE (MPH=(3-LI-7(P,G)4-BE-8)) M027000100022 ERR-ANALYS (ERR-T) Total error is the roots of square sum of: M027000100023 (ERR-1) Error of the absolute gamma quanta. M027000100024 (ERR-2) Error of the calculation of the solid angle of M027000100025 the sample subtended to the gamma-source. M027000100026 (ERR-3) Error of the shift of the position of the M027000100027 gamma-source. M027000100028 (ERR-S) Statistical error of beta-counting and others M027000100029 presented in SUBENTs below. M027000100030 COMMENT The photonuclear reaction cross section 63Cu(gamma,n) M027000100031 has been frequently used as the standard for M027000100032 (gamma,n) reactions. The different measured values M027000100033 do not agree with one another and can be roughly M027000100034 divided into two groups, namely, a group at about M027000100035 100 mb and a group at about 50 mb. It appears that M027000100036 the former group contains the values obtained mainly M027000100037 by measurements using bremsstrahlungs beams, while M027000100038 the latter contains those obtained mainly with Li-p M027000100039 gammas. M027000100040 The experiment attempts to re-determine the (gamma,n) M027000100041 cross section for copper, zinc, silver by Li-p M027000100042 gamma-rays M027000100043 Absolute measurement of gamma-quanta was performed by M027000100044 Hough's method, and reaction yields were determined M027000100045 by the activation method in which the absolute M027000100046 numbers of activated nuclei in samples were M027000100047 determined by measuring the beta-ray with a M027000100048 4pi-proportional counter and applying the 'method of M027000100049 extrapolation'. M027000100050 STATUS (TABLE) From the abstract of JPJ,14,693,1959. M027000100051 HISTORY (19880629C) M027000100052 (19910202A) Corrected by V.Varlamov, V.Mclane. M027000100053 (20160224A) Corrected by SD and VV: dates, ERR-ANALYS, M027000100054 AUTHOR (Yasumi), REACTION, SAMPLE, lowercase. M027000100055 ENDBIB 53 0 M027000100056 COMMON 3 3 M027000100057 ERR-1 ERR-2 ERR-3 M027000100058 PER-CENT PER-CENT PER-CENT M027000100059 13. 1. 4. M027000100060 ENDCOMMON 3 0 M027000100061 ENDSUBENT 60 0 M027000199999 SUBENT M0270002 20160224 M082M027000200001 BIB 4 12 M027000200002 REACTION (29-CU-63(G,N)29-CU-62,,SIG) M027000200003 SAMPLE Sample discs used were all 20 mm in diam. and 1 mm M027000200004 thick for copper. M027000200005 ERR-ANALYS (ERR-4,,2.5) Error of the fluctuation of gamma-ray M027000200006 intensities during the irradiation M027000200007 (ERR-5) Error of the decay constant M027000200008 (ERR-6) Error of the specific activity M027000200009 (ERR-7) Error of geometrical factor M027000200010 (ERR-8,,2.) Error of the contamination of beta M027000200011 activities of CU-64 for the beta counting. M027000200012 HISTORY (20160224A) Corrected by SD and VV: REACTION, M027000200013 ERR-ANALYS. M027000200014 ENDBIB 12 0 M027000200015 COMMON 4 3 M027000200016 ERR-S ERR-5 ERR-6 ERR-7 M027000200017 PER-CENT PER-CENT PER-CENT PER-CENT M027000200018 1.0 2. 3. 2. M027000200019 ENDCOMMON 3 0 M027000200020 DATA 3 1 M027000200021 EN DATA ERR-T M027000200022 MEV MB PER-CENT M027000200023 17.6 42.5 15.0 M027000200024 ENDDATA 3 0 M027000200025 ENDSUBENT 24 0 M027000299999 SUBENT M0270003 20160224 M082M027000300001 BIB 4 10 M027000300002 REACTION (30-ZN-64(G,N)30-ZN-63,,SIG) M027000300003 SAMPLE Sample discs used were all 20 mm in diam. and 1 mm M027000300004 thick for silver. M027000300005 ERR-ANALYS (ERR-4,,0.2) Error of the fluctuation of gamma-ray M027000300006 intensities during the irradiation. M027000300007 (ERR-6) Error of the specific activity M027000300008 (ERR-7) Error of geometrical factor M027000300009 * the error of decay constant negligibly small. M027000300010 HISTORY (20160224A) Corrected by SD and VV: REACTION, M027000300011 ERR-ANALYS. M027000300012 ENDBIB 10 0 M027000300013 COMMON 3 3 M027000300014 ERR-S ERR-6 ERR-7 M027000300015 PER-CENT PER-CENT PER-CENT M027000300016 4.0 10. 4. M027000300017 ENDCOMMON 3 0 M027000300018 DATA 3 1 M027000300019 EN DATA ERR-T M027000300020 MEV MB PER-CENT M027000300021 17.6 23.3 18.0 M027000300022 ENDDATA 3 0 M027000300023 ENDSUBENT 22 0 M027000399999 SUBENT M0270004 20160224 M082M027000400001 BIB 4 10 M027000400002 REACTION (47-AG-109(G,N)47-AG-108,,SIG) M027000400003 SAMPLE Sample discs used were all 20 mm in diam. and 0.6 mm M027000400004 thick for for zinc. M027000400005 ERR-ANALYS (ERR-4,,2.) Error of the fluctuation of gamma-ray M027000400006 intensities during the irradiation M027000400007 (ERR-5) Error of the decay constant M027000400008 (ERR-6) Error of the specific activity M027000400009 (ERR-7) Error of geometrical factor. M027000400010 HISTORY (20160224A) Corrected by SD and VV: REACTION, M027000400011 ERR-ANALYS. M027000400012 ENDBIB 10 0 M027000400013 COMMON 4 3 M027000400014 ERR-S ERR-5 ERR-6 ERR-7 M027000400015 PER-CENT PER-CENT PER-CENT PER-CENT M027000400016 4. 1. 7. 3. M027000400017 ENDCOMMON 3 0 M027000400018 DATA 3 1 M027000400019 EN DATA ERR-T M027000400020 MEV MB PER-CENT M027000400021 17.6 61.5 16.0 M027000400022 ENDDATA 3 0 M027000400023 ENDSUBENT 22 0 M027000499999 ENDENTRY 4 0 M027099999999