ENTRY L0234 20180904 L038L023400000001 SUBENT L0234001 20180904 L038L023400100001 BIB 14 34 L023400100002 TITLE The Gamma-Neutron Cross Section for N14 L023400100003 AUTHOR (J.D.King,R.N.H.Haslam,R.W.Parsons) L023400100004 REFERENCE (J,CJP,38,231,1960) L023400100005 #doi:10.1139/p60-023 L023400100006 INSTITUTE (1CANSAS) L023400100007 FACILITY (BETAT,1CANSAS) The University of Saskatchewan L023400100008 betatron. L023400100009 INC-SOURCE (BRST) L023400100010 SAMPLE Reagent quality dicyandiamide, C2H4N4, was pressed L023400100011 into disks of diameter 4.5 cm and thickness 1.2 cm; L023400100012 the mean weight of the samples was 24.86 g, the L023400100013 maximum deviation from this value being 0.03 g. L023400100014 DETECTOR (NAICR) Two 2 in. x 2 in. NaI crystals. L023400100015 METHOD (ACTIV) The targets were irradiated in the X-ray beam L023400100016 of the University of Saskatchewan betatron at regular L023400100017 intervals of approximately 0.2 MeV from 10.5 to 25 MeV.L023400100018 ANALYSIS The scale of the yield curve was determined by L023400100019 comparing the yields from thin samples of copper and L023400100020 dicyandiamide at 22 MeV with the aid of a flow L023400100021 counter; the yield from the reaction L023400100022 Cu63(gamma,n)Cu62 was assumed to be 2.25x10**8 L023400100023 disintegrations per mole per 100 roentgens (dose) L023400100024 (Roalsvig et al. 1959.) L023400100025 REL-REF (R,L0235001,J.P.Roalsvig+,J,CJP,37,607,1959) L023400100026 DECAY-DATA (7-N-13,9.93MIN,B+) L023400100027 CORRECTION Since dicyandiamide contains carbon, above 18.72 Mev L023400100028 the reaction C12(gamma,n)Cl1 will produce a positron L023400100029 emitter of half-life 20.5 minutes which contributes L023400100030 to the observed activity. A correction for this was L023400100031 determined experimentally at 1-Mev intervals by L023400100032 following the sample activity for 62 minutes and L023400100033 analyzing the resulting decay curve into its two L023400100034 components by the method of least squares. L023400100035 HISTORY (20180904C) BP L023400100036 ENDBIB 34 0 L023400100037 NOCOMMON 0 0 L023400100038 ENDSUBENT 37 0 L023400199999 SUBENT L0234002 20180904 L038L023400200001 BIB 3 3 L023400200002 REACTION (7-N-14(G,N)7-N-13,,SIG,,BRS) L023400200003 ANALYSIS (PLA) L023400200004 STATUS (CURVE) Fig. 4, page 237. L023400200005 ENDBIB 3 0 L023400200006 NOCOMMON 0 0 L023400200007 DATA 2 142 L023400200008 EN DATA L023400200009 MEV MB L023400200010 10.66 0.004 L023400200011 10.73 0.020 L023400200012 10.83 0.008 L023400200013 10.92 0.013 L023400200014 11.03 0.015 L023400200015 11.15 0.020 L023400200016 11.24 0.031 L023400200017 11.33 0.042 L023400200018 11.41 0.091 L023400200019 11.52 0.173 L023400200020 11.62 0.242 L023400200021 11.67 0.264 L023400200022 11.74 0.282 L023400200023 11.86 0.269 L023400200024 12.15 0.253 L023400200025 12.26 0.291 L023400200026 12.35 0.334 L023400200027 12.46 0.379 L023400200028 12.54 0.433 L023400200029 12.63 0.483 L023400200030 12.72 0.537 L023400200031 12.82 0.566 L023400200032 12.94 0.569 L023400200033 13.04 0.615 L023400200034 13.13 0.631 L023400200035 13.22 0.645 L023400200036 13.32 0.642 L023400200037 13.45 0.610 L023400200038 13.55 0.563 L023400200039 13.64 0.505 L023400200040 13.72 0.438 L023400200041 13.84 0.390 L023400200042 13.93 0.357 L023400200043 14.04 0.336 L023400200044 14.14 0.310 L023400200045 14.35 0.238 L023400200046 14.42 0.206 L023400200047 14.51 0.190 L023400200048 14.65 0.213 L023400200049 14.70 0.309 L023400200050 14.84 0.415 L023400200051 14.89 0.503 L023400200052 15.02 0.563 L023400200053 15.12 0.583 L023400200054 15.24 0.597 L023400200055 15.37 0.554 L023400200056 15.45 0.435 L023400200057 15.53 0.393 L023400200058 15.63 0.368 L023400200059 15.75 0.309 L023400200060 15.82 0.192 L023400200061 15.93 0.091 L023400200062 16.02 0.047 L023400200063 16.13 0.028 L023400200064 16.24 0.125 L023400200065 16.32 0.201 L023400200066 16.40 0.179 L023400200067 16.52 0.190 L023400200068 16.59 0.228 L023400200069 16.71 0.265 L023400200070 16.83 0.282 L023400200071 16.91 0.312 L023400200072 16.99 0.339 L023400200073 17.14 0.375 L023400200074 17.22 0.453 L023400200075 17.33 0.505 L023400200076 17.43 0.555 L023400200077 17.51 0.602 L023400200078 17.64 0.646 L023400200079 17.69 0.680 L023400200080 17.83 0.691 L023400200081 17.93 0.721 L023400200082 18.04 0.837 L023400200083 18.14 1.020 L023400200084 18.21 1.238 L023400200085 18.32 1.431 L023400200086 18.43 1.573 L023400200087 18.54 1.622 L023400200088 18.61 1.645 L023400200089 18.73 1.689 L023400200090 18.81 1.789 L023400200091 18.92 1.935 L023400200092 19.02 1.935 L023400200093 19.13 1.838 L023400200094 19.21 1.827 L023400200095 19.29 1.858 L023400200096 19.42 1.865 L023400200097 19.54 1.840 L023400200098 19.61 1.797 L023400200099 19.69 1.816 L023400200100 19.81 1.853 L023400200101 19.92 1.854 L023400200102 20.00 1.872 L023400200103 20.11 1.870 L023400200104 20.20 1.874 L023400200105 20.30 1.824 L023400200106 20.43 1.722 L023400200107 20.51 1.681 L023400200108 20.64 1.588 L023400200109 20.68 1.548 L023400200110 20.81 1.528 L023400200111 20.92 1.445 L023400200112 20.99 1.417 L023400200113 21.13 1.211 L023400200114 21.21 1.045 L023400200115 21.34 1.354 L023400200116 21.43 1.878 L023400200117 21.49 2.236 L023400200118 21.61 2.375 L023400200119 21.67 2.481 L023400200120 21.78 2.595 L023400200121 21.85 2.697 L023400200122 21.96 2.791 L023400200123 22.08 2.751 L023400200124 22.28 2.850 L023400200125 22.39 2.757 L023400200126 22.47 2.732 L023400200127 22.56 2.780 L023400200128 22.68 2.769 L023400200129 22.76 2.834 L023400200130 22.88 2.845 L023400200131 22.98 2.861 L023400200132 23.06 2.912 L023400200133 23.12 2.872 L023400200134 23.23 2.921 L023400200135 23.36 2.953 L023400200136 23.46 2.919 L023400200137 23.56 2.942 L023400200138 23.66 2.839 L023400200139 23.80 2.750 L023400200140 23.86 2.576 L023400200141 23.96 2.328 L023400200142 24.10 2.279 L023400200143 24.21 2.173 L023400200144 24.28 2.049 L023400200145 24.39 1.950 L023400200146 24.51 1.737 L023400200147 24.60 1.615 L023400200148 24.68 1.485 L023400200149 24.77 1.404 L023400200150 24.89 1.431 L023400200151 25.03 1.132 L023400200152 ENDDATA 144 0 L023400200153 ENDSUBENT 152 0 L023400299999 SUBENT L0234003 20180904 L038L023400300001 BIB 2 3 L023400300002 REACTION (7-N-14(G,N)7-N-13,,INT) L023400300003 STATUS (DEP,L0234002) L023400300004 (TABLE) page 238. L023400300005 ENDBIB 3 0 L023400300006 NOCOMMON 0 0 L023400300007 DATA 2 1 L023400300008 EN-MAX DATA L023400300009 MEV MB*MEV L023400300010 16.0 1.8 L023400300011 ENDDATA 3 0 L023400300012 ENDSUBENT 11 0 L023400399999 ENDENTRY 3 0 L023499999999