ENTRY M0526 20061027 M041M052600000001 SUBENT M0526001 20061027 M041M052600100001 BIB 14 29 M052600100002 TITLE Investigation of Isomer States Excitation in (G,N) M052600100003 Reactions on Nuclei Shell Near N = 82. M052600100004 AUTHOR (V.M.MAZUR,V.A.ZHELTONOZHSKY,Z.M.BIGAN) M052600100005 INSTITUTE (4UKRIRE) M052600100006 REFERENCE (J,YF,58,(6),970,1995) M052600100007 (J,PAN,58,(6),898,1995) M052600100008 INC-SOURCE (BRST) M052600100009 FACILITY (MICRT,4UKRIRE) M052600100010 SAMPLE The samples of enriched up to more then 90 % isotopes M052600100011 were used. M052600100012 METHOD (ACTIV) Induced g-activity was measured. M052600100013 DETECTOR (GE-IN) 170 cm***3 volume Ge-detector. M052600100014 ANALYSIS (PLA) Energy bin delta(E) = 0.5 MeV Penfold-Leiss M052600100015 method of cross section unfolding from the M052600100016 experimental yield curve. M052600100017 ERR-ANALYS (ERR-S) Statistical errors are given. M052600100018 STATUS (CURVE) Data were prepared at the MSU INP CDFE by M052600100019 V.V.Varlamov. M052600100020 COMMENT Excitation of isomer states of nuclei near N = 82 is M052600100021 investigated. The cross sections of the (g,n)-m M052600100022 reactions on Ba-138, Nd-142, and Sm-144 in the energy M052600100023 range 8 - 18 MeV are measured. Energy dependence of M052600100024 isomeric yields ratio is considered. Essential M052600100025 reduction of the isomeric ratios with N observed for M052600100026 the nuclei under study is resulted to the shell M052600100027 effects and semi-direct processes contribution. M052600100028 HISTORY (19980313C) M052600100029 (20061025A) REFERENCE and DATES corrected at MSU CDFE, M052600100030 lowercase. M052600100031 ENDBIB 29 0 M052600100032 NOCOMMON 0 0 M052600100033 ENDSUBENT 32 0 M052600199999 SUBENT M0526002 20061027 M041M052600200001 BIB 1 1 M052600200002 REACTION (56-BA-138(G,N)56-BA-137-M,,SIG,,BRS) M052600200003 ENDBIB 1 0 M052600200004 NOCOMMON 0 0 M052600200005 DATA 3 14 M052600200006 EN DATA ERR-S M052600200007 MEV MB MB M052600200008 11.5 .55 .45 M052600200009 12. 2. .75 M052600200010 12.5 3.3 .95 M052600200011 13. 4.5 1. M052600200012 13.5 6.5 .95 M052600200013 14. 10.7 1. M052600200014 14.5 14.25 1.25 M052600200015 15. 18.5 1.55 M052600200016 15.5 20.25 1.65 M052600200017 16. 19.6 1.5 M052600200018 16.5 15.8 1.75 M052600200019 17. 11.5 1.5 M052600200020 17.5 8.75 1.6 M052600200021 18. 3.75 2. M052600200022 ENDDATA 16 0 M052600200023 ENDSUBENT 22 0 M052600299999 SUBENT M0526003 20061027 M041M052600300001 BIB 1 1 M052600300002 REACTION (60-ND-142(G,N)60-ND-141-M,,SIG,,BRS) M052600300003 ENDBIB 1 0 M052600300004 NOCOMMON 0 0 M052600300005 DATA 3 12 M052600300006 EN DATA ERR-S M052600300007 MEV MB MB M052600300008 12. 1. .35 M052600300009 12.5 3.5 .75 M052600300010 13. 6. 1. M052600300011 13.5 9.9 1. M052600300012 14. 13. 1.2 M052600300013 14.5 16.15 1.25 M052600300014 15. 17.6 1.3 M052600300015 15.5 19. 1.4 M052600300016 16. 18.7 1.6 M052600300017 16.5 16.65 1.65 M052600300018 17. 11.65 2.3 M052600300019 17.5 8.75 3. M052600300020 ENDDATA 14 0 M052600300021 ENDSUBENT 20 0 M052600399999 SUBENT M0526004 20061027 M041M052600400001 BIB 1 1 M052600400002 REACTION (62-SM-144(G,N)62-SM-143-M,,SIG,,BRS) M052600400003 ENDBIB 1 0 M052600400004 NOCOMMON 0 0 M052600400005 DATA 3 12 M052600400006 EN DATA ERR-S M052600400007 MEV MB MB M052600400008 12.5 .72 .36 M052600400009 13. 2.56 1.08 M052600400010 13.5 4.1 1.28 M052600400011 14. 8. 1.33 M052600400012 14.5 10. 1.33 M052600400013 15. 15.08 1.33 M052600400014 15.5 18.77 1.54 M052600400015 16. 19.49 1.54 M052600400016 16.5 22.56 1.59 M052600400017 17. 21.95 1.79 M052600400018 17.5 12.72 2.05 M052600400019 18. 9.85 2.72 M052600400020 ENDDATA 14 0 M052600400021 ENDSUBENT 20 0 M052600499999 SUBENT M0526005 20061027 M041M052600500001 BIB 3 8 M052600500002 REACTION (56-BA-138(G,N)56-BA-137-M/T,,SIG/RAT,,BRS) M052600500003 COMMENT The isomeric yield ratio theta = Y(M)/Y(N) = M052600500004 Y(M)/(Y(M) + Y(G)) = 1/(1 + 1/D) where D = Y(M)/Y(G) M052600500005 was obtained using photoneutron yield Y(N) calculated M052600500006 from the known photoneutron reaction cross section M052600500007 data because 56-Ba-137-g ground state is stable. M052600500008 REL-REF (R,L0019005,B.L.BERMAN+,J,PR/C,2,2318,1970) M052600500009 56-Ba-138(g,n) reaction cross section data. M052600500010 ENDBIB 8 0 M052600500011 NOCOMMON 0 0 M052600500012 DATA 3 15 M052600500013 EN DATA ERR-S M052600500014 MEV NO-DIM NO-DIM M052600500015 11.5 .0149 M052600500016 12. .0259 M052600500017 12.5 .0549 M052600500018 13. .051 .0153 M052600500019 13.5 .0624 M052600500020 14. .0667 M052600500021 14.5 .0831 .0153 M052600500022 15. .0863 M052600500023 15.5 .102 M052600500024 16. .103 .0184 M052600500025 16.5 .1153 M052600500026 17. .1137 M052600500027 17.5 .1274 .0196 M052600500028 18. .1255 M052600500029 18.5 .133 M052600500030 ENDDATA 17 0 M052600500031 ENDSUBENT 30 0 M052600599999 SUBENT M0526006 20061027 M041M052600600001 BIB 3 8 M052600600002 REACTION (60-ND-142(G,N)60-ND-141-M/G,,SIG/RAT,,BRS) M052600600003 MISC-COL The isomeric yield ratio THETA = Y(M)/Y(N) = M052600600004 Y(M)/(Y(M) + Y(G)) = 1/(1 + 1/D) where D = Y(M)/Y(G) M052600600005 was measured. M052600600006 COMMENT The isomeric yield ratio THETA = Y(M)/Y(N) = M052600600007 Y(M)/(Y(M) + Y(G)) = 1/(1 + 1/D) where D = Y(M)/Y(G) M052600600008 was measured directly because 60-Nd-141-g ground M052600600009 state is unstable. M052600600010 ENDBIB 8 0 M052600600011 NOCOMMON 0 0 M052600600012 DATA 3 14 M052600600013 EN DATA ERR-S M052600600014 MEV NO-DIM NO-DIM M052600600015 12. .0027 .0016 M052600600016 12.5 .0053 .002 M052600600017 13. .0126 .002 M052600600018 13.5 .148 .002 M052600600019 14. .219 .002 M052600600020 14.5 .0225 .002 M052600600021 15. .0293 .0023 M052600600022 15.5 .032 .0025 M052600600023 16. .0348 .0025 M052600600024 16.5 .038 .0027 M052600600025 17. .04 .0027 M052600600026 17.5 .042 .0033 M052600600027 18. .042 .0026 M052600600028 18.5 .044 .0031 M052600600029 ENDDATA 16 0 M052600600030 ENDSUBENT 29 0 M052600699999 SUBENT M0526007 20061027 M041M052600700001 BIB 3 8 M052600700002 REACTION (62-SM-144(G,N)62-SM-143-M/G,,SIG/RAT,,BRS) M052600700003 MISC-COL The isomeric yield ratio THETA = Y(M)/Y(N) = M052600700004 Y(M)/(Y(M) + Y(G)) = 1/(1 + 1/D) where D = Y(M)/Y(G) M052600700005 was measured. M052600700006 COMMENT The isomeric yield ratio THETA = Y(M)/Y(N) = M052600700007 Y(M)/(Y(M) + Y(G)) = 1/(1 + 1/D) where D = Y(M)/Y(G) M052600700008 was measured directly because 62-Sm-143-g ground M052600700009 state is unstable. M052600700010 ENDBIB 8 0 M052600700011 NOCOMMON 0 0 M052600700012 DATA 3 14 M052600700013 EN DATA ERR-S M052600700014 MEV NO-DIM NO-DIM M052600700015 12. .0013 .0013 M052600700016 12.5 .0037 .0022 M052600700017 13. .0059 .002 M052600700018 13.5 .0095 .0022 M052600700019 14. .0157 .002 M052600700020 14.5 .0176 .0021 M052600700021 15. .02 .0024 M052600700022 15.5 .023 .002 M052600700023 16. .026 .0027 M052600700024 16.5 .034 .0035 M052600700025 17. .0291 .003 M052600700026 17.5 .031 .0026 M052600700027 18. .033 .0031 M052600700028 18.5 .0411 .0037 M052600700029 ENDDATA 16 0 M052600700030 ENDSUBENT 29 0 M052600799999 ENDENTRY 7 0 M052699999999