ENTRY M0239 20121103 M065M023900000001 SUBENT M0239001 20121103 M065M023900100001 BIB 15 38 M023900100002 TITLE Study of the cross section of the reaction M023900100003 Cu-63(gamma,n) on the beam of quasimonochromatic M023900100004 annihilation photons in energy range 12-25 MeV. M023900100005 AUTHOR (L.Z.Dzhilavyan, N.P.Kucher) M023900100006 INSTITUTE (4RUSJIA) M023900100007 REFERENCE (J,YF,30,294,1979) M023900100008 (J,SNP,30,151,1979) - Eng.trans.of YF,30,294,1979 M023900100009 FACILITY (LINAC,4RUSJIA) M023900100010 INC-SOURCE (QMPH,ARAD) Quasimonoenergetic photons were obtained M023900100011 by annihilation of positrons in flight. M023900100012 METHOD (ACTIV) Positron activity of Cu-62 nuclei was M023900100013 measured. M023900100014 DETECTOR (COIN,NAICR,NAICR) Two crystals were used for the M023900100015 detection of positron activity of Cu-62 nuclei. M023900100016 (IOCH) To monitor positron and electron beams thin M023900100017 wall ionization chambers were used. M023900100018 PART-DET (B+) M023900100019 MONITOR The absolute effectivity of the spectrometer was M023900100020 measured by using a standard F-18 source of beta M023900100021 activity. M023900100022 ADD-RES (COMP) With data of early experimental measurements. M023900100023 The absolute value of cross section in this M023900100024 experiment appeared to Be less than it in bremsstrah- M023900100025 lung experiments. M023900100026 The value of efficiency of g-quanta detection was foundM023900100027 to be 0.061+-0.004. M023900100028 ANALYSIS Photoneutron yields were measured both on positron and M023900100029 electron beams with step 1. MeV in the energy range M023900100030 from 10 up to 25 MeV. The measurements were made M023900100031 several times. The results were close to each other. M023900100032 ERR-ANALYS (ERR-S) Statistical errors are presented. M023900100033 STATUS (TABLE,APRVD) by L.Z.Dzhilavyan M023900100034 HISTORY (19900321C) M023900100035 (19910202A) Corrected by V.Varlamov, V.Mclane M023900100036 (20121103A) SD: Updated to new date formats,lower case.M023900100037 Corrected according last EXFOR rules and Dict. M023900100038 Ref. on transl. was added. M023900100039 VV: STATUS. M023900100040 ENDBIB 38 0 M023900100041 NOCOMMON 0 0 M023900100042 ENDSUBENT 41 0 M023900199999 SUBENT M0239002 20121103 M065M023900200001 BIB 1 2 M023900200002 REACTION (29-CU-63(G,N)29-CU-62,,SIG,,REL) M023900200003 The yield was measured for the electron beam. M023900200004 ENDBIB 2 0 M023900200005 NOCOMMON 0 0 M023900200006 DATA 3 10 M023900200007 EN DATA ERR-S M023900200008 MEV ARB-UNITS ARB-UNITS M023900200009 16. 28. 5.6 M023900200010 17. 45.6 8. M023900200011 18. 86.4 7.2 M023900200012 19. 147.2 8.8 M023900200013 20. 235.2 8. M023900200014 21. 298.4 8. M023900200015 22. 448.8 12.8 M023900200016 23. 499.2 14.4 M023900200017 24. 564.8 14.4 M023900200018 25. 701.5 22.4 M023900200019 ENDDATA 12 0 M023900200020 ENDSUBENT 19 0 M023900299999 SUBENT M0239003 20121103 M065M023900300001 BIB 1 3 M023900300002 REACTION (29-CU-63(G,N)29-CU-62,,SIG,,REL) M023900300003 The yield was measured for the positron beam M023900300004 used to obtain the annihilation gamma quanta. M023900300005 ENDBIB 3 0 M023900300006 NOCOMMON 0 0 M023900300007 DATA 3 14 M023900300008 EN DATA ERR-S M023900300009 MEV ARB-UNITS ARB-UNITS M023900300010 12.2 34.4 12. M023900300011 13.1 64. 12. M023900300012 14.0 99.2 9.6 M023900300013 14.9 184.8 9.6 M023900300014 15.9 285.6 14.4 M023900300015 16.8 334.4 20.8 M023900300016 17.7 398.4 16. M023900300017 18.6 419.2 16. M023900300018 19.5 489.6 24. M023900300019 20.5 473.6 13.6 M023900300020 21.4 481.6 16. M023900300021 22.3 590.4 16. M023900300022 23.2 630.4 16. M023900300023 24.2 696.8 16. M023900300024 ENDDATA 16 0 M023900300025 ENDSUBENT 24 0 M023900399999 SUBENT M0239004 20121103 M065M023900400001 BIB 1 4 M023900400002 REACTION (29-CU-63(G,N)29-CU-62,,SIG) M023900400003 The cross section was obtained as the difference M023900400004 between two yields measured for the positron and M023900400005 electron beams. M023900400006 ENDBIB 4 0 M023900400007 NOCOMMON 0 0 M023900400008 DATA 3 14 M023900400009 EN DATA ERR-S M023900400010 MEV MB MB M023900400011 12.1 11.1 2.3 M023900400012 13.1 20.0 2.9 M023900400013 14.0 28.9 2.0 M023900400014 14.9 46.2 1.8 M023900400015 15.9 63.1 2.9 M023900400016 16.9 68.9 4.6 M023900400017 17.8 70.3 4.9 M023900400018 18.7 59.1 4.6 M023900400019 19.6 54.9 6.2 M023900400020 20.4 36. 6. M023900400021 21.4 30.3 6. M023900400022 22.3 15. 6. M023900400023 23.3 16.2 6. M023900400024 24.2 12. 7.6 M023900400025 ENDDATA 16 0 M023900400026 ENDSUBENT 25 0 M023900499999 ENDENTRY 4 0 M023999999999