ENTRY M0637 20060125 M039M063700000001 SUBENT M0637001 20060125 M039M063700100001 BIB 16 40 M063700100002 TITLE The photoneutron cross section of Ca-44. M063700100003 AUTHOR (P.D.HARTY,M.N.THOMPSON) M063700100004 INSTITUTE (3AULAML) M063700100005 REFERENCE (J,AUJ,34,505,1981) M063700100006 INC-SOURCE (BRST) M063700100007 FACILITY (BETAT,3AULAML) M063700100008 SAMPLE 3-g sample of isotopically enriched (98.5 % 44Ca) in M063700100009 form of a thin cylinder 25.4 mm in diameter and 3.9 M063700100010 mm thick. M063700100011 DETECTOR (BF3) 4PI Halpern-type neutron detector. M063700100012 METHOD (EXTB,SITA) The reaction yield curve measurement. A M063700100013 total of 33 yield curves were taken with the 44Ca M063700100014 sample and 15 yield curves with the sample removed, M063700100015 in order to determine te background effects due to M063700100016 the target holder. M063700100017 ANALYSIS (PLA) The variable bin Penfold-Leiss method for cross M063700100018 section unfolding from the averaged neutron yield M063700100019 curve. M063700100020 Above the 44Ca(G,2n) threshold at 19.1 MeV, M063700100021 allowance for neutron multiplicity was made on the M063700100022 basis of a statistical model, described by sambell M063700100023 and Spicer. S M063700100024 CORRECTION Reaction yield curve correction for photoneutron M063700100025 multiplicity. M063700100026 REL-REF (N,,R.W.SAMBELL+,J,NP/A,205,139,1973) The method of M063700100027 the reaction yield curve correction for photoneutron M063700100028 multiplicity. M063700100029 ERR-ANALYS (DATA-ERR) Statistical errors are given. M063700100030 STATUS (CURVE) Data from Fig. 1 were prepared at the MSU M063700100031 SINP CDFE by V.V.Varlamov. M063700100032 COMMENT Measurement of the photoneutron cross section M063700100033 44Ca(g,sn) reaction (sn = n + np + 2n) has been made M063700100034 over the photon energy range 11 - 26 MeV. Comparison M063700100035 with 44Ca(g,p) cross section shows evidence for M063700100036 isospin splitting of the giant dipole resonance M063700100037 (GDR) in agreement eith predictions. some evidence M063700100038 has also been found for deformation splitting of the M063700100039 44CA GDR. M063700100040 HISTORY (20021024C) M063700100041 (20060125C) REFERENCE corrected, lowercase at MSU CDFE.M063700100042 ENDBIB 40 0 M063700100043 NOCOMMON 0 0 M063700100044 ENDSUBENT 43 0 M063700199999 SUBENT M0637002 20060125 M039M063700200001 BIB 1 3 M063700200002 REACTION (20-CA-44(G,X)0-NN-1,UNW,SIG,,BRS) M063700200003 Cross section for the sum of reactions (g,n) + M063700200004 (g,np) + (g,2n). M063700200005 ENDBIB 3 0 M063700200006 NOCOMMON 0 0 M063700200007 DATA 3 146 M063700200008 EN DATA DATA-ERR M063700200009 MEV MB MB M063700200010 11.16 0.91 0.51 M063700200011 11.28 1.47 0.56 M063700200012 11.38 1.12 0.91 M063700200013 11.51 2.18 0.66 M063700200014 11.59 2.08 0.36 M063700200015 11.68 3.25 0.81 M063700200016 11.81 4.31 0.66 M063700200017 11.91 5.69 1.02 M063700200018 11.97 5.33 0.96 M063700200019 12.02 6.40 0.71 M063700200020 12.14 7.21 0.71 M063700200021 12.28 8.58 0.66 M063700200022 12.38 7.82 0.81 M063700200023 12.47 10.30 0.76 M063700200024 12.56 9.70 0.76 M063700200025 12.66 12.34 0.86 M063700200026 12.76 13.25 0.86 M063700200027 12.87 12.59 0.91 M063700200028 13.00 14.42 0.81 M063700200029 13.11 15.63 0.81 M063700200030 13.21 14.92 0.81 M063700200031 13.32 18.02 1.07 M063700200032 13.40 17.36 1.12 M063700200033 13.51 20.81 0.81 M063700200034 13.61 19.80 0.91 M063700200035 13.71 16.65 1.22 M063700200036 13.80 22.13 1.22 M063700200037 13.91 19.64 1.37 M063700200038 13.98 22.08 1.17 M063700200039 14.06 22.84 1.12 M063700200040 14.14 21.62 1.32 M063700200041 14.26 21.73 1.22 M063700200042 14.35 25.33 1.37 M063700200043 14.46 25.48 1.42 M063700200044 14.53 28.43 1.42 M063700200045 14.66 25.79 1.52 M063700200046 14.76 28.22 2.03 M063700200047 14.87 23.76 1.83 M063700200048 14.96 28.38 1.78 M063700200049 15.06 23.55 1.62 M063700200050 15.18 29.90 1.98 M063700200051 15.29 34.31 2.03 M063700200052 15.36 29.95 1.93 M063700200053 15.45 33.96 1.88 M063700200054 15.57 32.39 2.23 M063700200055 15.66 33.91 2.23 M063700200056 15.77 36.40 2.18 M063700200057 15.88 40.96 2.39 M063700200058 15.98 37.21 2.39 M063700200059 16.11 35.74 2.54 M063700200060 16.20 38.63 2.49 M063700200061 16.31 43.25 2.54 M063700200062 16.42 41.42 2.54 M063700200063 16.51 43.40 2.28 M063700200064 16.64 47.51 2.64 M063700200065 16.73 47.77 2.69 M063700200066 16.82 48.22 2.74 M063700200067 16.94 47.01 2.74 M063700200068 17.04 45.18 2.74 M063700200069 17.15 44.11 2.89 M063700200070 17.23 48.43 2.74 M063700200071 17.33 47.36 3.20 M063700200072 17.44 48.32 3.15 M063700200073 17.53 44.77 3.25 M063700200074 17.64 43.25 3.25 M063700200075 17.71 47.36 3.40 M063700200076 17.82 51.47 3.65 M063700200077 17.92 44.67 3.45 M063700200078 18.06 39.80 3.35 M063700200079 18.16 50.66 3.15 M063700200080 18.27 43.45 3.35 M063700200081 18.37 45.69 3.45 M063700200082 18.46 42.64 3.55 M063700200083 18.59 38.68 3.35 M063700200084 18.68 39.70 3.55 M063700200085 18.77 46.50 3.45 M063700200086 18.87 41.62 3.55 M063700200087 18.99 44.72 3.60 M063700200088 19.08 41.17 3.60 M063700200089 19.19 42.39 3.71 M063700200090 19.29 45.89 3.96 M063700200091 19.39 49.44 3.76 M063700200092 19.49 38.27 3.96 M063700200093 19.57 46.50 3.96 M063700200094 19.67 46.70 4.06 M063700200095 19.78 41.37 3.81 M063700200096 19.87 46.24 3.91 M063700200097 19.98 45.03 3.81 M063700200098 20.09 46.55 3.60 M063700200099 20.20 38.83 3.30 M063700200100 20.31 40.86 3.30 M063700200101 20.41 39.34 3.50 M063700200102 20.52 53.15 3.20 M063700200103 20.70 44.57 3.76 M063700200104 20.80 46.14 3.60 M063700200105 20.91 46.65 3.71 M063700200106 21.02 38.68 3.55 M063700200107 21.11 36.95 3.76 M063700200108 21.22 37.56 3.45 M063700200109 21.32 39.54 3.40 M063700200110 21.43 33.35 3.60 M063700200111 21.53 37.16 3.25 M063700200112 21.62 39.85 3.30 M063700200113 21.72 34.52 3.35 M063700200114 21.82 38.58 3.25 M063700200115 21.95 34.52 2.94 M063700200116 22.04 34.92 2.94 M063700200117 22.15 39.80 3.15 M063700200118 22.26 38.02 2.99 M063700200119 22.35 37.72 3.10 M063700200120 22.44 30.86 3.25 M063700200121 22.55 28.58 3.30 M063700200122 22.65 31.57 3.05 M063700200123 22.76 24.06 3.05 M063700200124 22.86 23.81 3.10 M063700200125 22.93 30.10 3.20 M063700200126 23.06 28.83 3.25 M063700200127 23.17 32.28 3.05 M063700200128 23.25 31.57 3.05 M063700200129 23.37 28.17 2.99 M063700200130 23.48 28.98 2.99 M063700200131 23.56 29.90 2.89 M063700200132 23.67 28.17 3.10 M063700200133 23.75 23.71 2.79 M063700200134 23.83 21.27 2.69 M063700200135 23.90 27.06 2.59 M063700200136 23.99 24.21 2.49 M063700200137 24.10 22.79 2.69 M063700200138 24.18 17.82 2.69 M063700200139 24.27 18.12 2.69 M063700200140 24.40 17.21 2.79 M063700200141 24.48 21.37 2.69 M063700200142 24.58 20.30 2.64 M063700200143 24.69 16.85 2.54 M063700200144 24.79 21.22 2.64 M063700200145 24.89 20.00 2.64 M063700200146 24.99 20.15 2.69 M063700200147 25.09 19.39 2.44 M063700200148 25.19 15.18 2.39 M063700200149 25.30 17.16 1.93 M063700200150 25.37 14.72 2.54 M063700200151 25.48 12.49 2.64 M063700200152 25.61 15.94 2.44 M063700200153 25.71 9.49 2.39 M063700200154 25.78 12.79 2.34 M063700200155 25.91 14.97 2.49 M063700200156 ENDDATA 148 0 M063700200157 ENDSUBENT 156 0 M063700299999 ENDENTRY 2 0 M063799999999