ENTRY L0234 20180904 L038L0234 0 1 SUBENT L0234001 20180904 L038L0234 1 1 BIB 14 34 L0234 1 2 TITLE The Gamma-Neutron Cross Section for N14 L0234 1 3 AUTHOR (J.D.King,R.N.H.Haslam,R.W.Parsons) L0234 1 4 REFERENCE (J,CJP,38,231,1960) L0234 1 5 #doi:10.1139/p60-023 L0234 1 6 INSTITUTE (1CANSAS) L0234 1 7 FACILITY (BETAT,1CANSAS) The University of Saskatchewan L0234 1 8 betatron. L0234 1 9 INC-SOURCE (BRST) L0234 1 10 SAMPLE Reagent quality dicyandiamide, C2H4N4, was pressed L0234 1 11 into disks of diameter 4.5 cm and thickness 1.2 cm; L0234 1 12 the mean weight of the samples was 24.86 g, the L0234 1 13 maximum deviation from this value being 0.03 g. L0234 1 14 DETECTOR (NAICR) Two 2 in. x 2 in. NaI crystals. L0234 1 15 METHOD (ACTIV) The targets were irradiated in the X-ray beam L0234 1 16 of the University of Saskatchewan betatron at regular L0234 1 17 intervals of approximately 0.2 MeV from 10.5 to 25 MeV.L0234 1 18 ANALYSIS The scale of the yield curve was determined by L0234 1 19 comparing the yields from thin samples of copper and L0234 1 20 dicyandiamide at 22 MeV with the aid of a flow L0234 1 21 counter; the yield from the reaction L0234 1 22 Cu63(gamma,n)Cu62 was assumed to be 2.25x10**8 L0234 1 23 disintegrations per mole per 100 roentgens (dose) L0234 1 24 (Roalsvig et al. 1959.) L0234 1 25 REL-REF (R,L0235001,J.P.Roalsvig+,J,CJP,37,607,1959) L0234 1 26 DECAY-DATA (7-N-13,9.93MIN,B+) L0234 1 27 CORRECTION Since dicyandiamide contains carbon, above 18.72 Mev L0234 1 28 the reaction C12(gamma,n)Cl1 will produce a positron L0234 1 29 emitter of half-life 20.5 minutes which contributes L0234 1 30 to the observed activity. A correction for this was L0234 1 31 determined experimentally at 1-Mev intervals by L0234 1 32 following the sample activity for 62 minutes and L0234 1 33 analyzing the resulting decay curve into its two L0234 1 34 components by the method of least squares. L0234 1 35 HISTORY (20180904C) BP L0234 1 36 ENDBIB 34 0 L0234 1 37 NOCOMMON 0 0 L0234 1 38 ENDSUBENT 37 0 L0234 199999 SUBENT L0234002 20180904 L038L0234 2 1 BIB 3 3 L0234 2 2 REACTION (7-N-14(G,N)7-N-13,,SIG,,BRS) L0234 2 3 ANALYSIS (PLA) L0234 2 4 STATUS (CURVE) Fig. 4, page 237. L0234 2 5 ENDBIB 3 0 L0234 2 6 NOCOMMON 0 0 L0234 2 7 DATA 2 142 L0234 2 8 EN DATA L0234 2 9 MEV MB L0234 2 10 10.66 0.004 L0234 2 11 10.73 0.020 L0234 2 12 10.83 0.008 L0234 2 13 10.92 0.013 L0234 2 14 11.03 0.015 L0234 2 15 11.15 0.020 L0234 2 16 11.24 0.031 L0234 2 17 11.33 0.042 L0234 2 18 11.41 0.091 L0234 2 19 11.52 0.173 L0234 2 20 11.62 0.242 L0234 2 21 11.67 0.264 L0234 2 22 11.74 0.282 L0234 2 23 11.86 0.269 L0234 2 24 12.15 0.253 L0234 2 25 12.26 0.291 L0234 2 26 12.35 0.334 L0234 2 27 12.46 0.379 L0234 2 28 12.54 0.433 L0234 2 29 12.63 0.483 L0234 2 30 12.72 0.537 L0234 2 31 12.82 0.566 L0234 2 32 12.94 0.569 L0234 2 33 13.04 0.615 L0234 2 34 13.13 0.631 L0234 2 35 13.22 0.645 L0234 2 36 13.32 0.642 L0234 2 37 13.45 0.610 L0234 2 38 13.55 0.563 L0234 2 39 13.64 0.505 L0234 2 40 13.72 0.438 L0234 2 41 13.84 0.390 L0234 2 42 13.93 0.357 L0234 2 43 14.04 0.336 L0234 2 44 14.14 0.310 L0234 2 45 14.35 0.238 L0234 2 46 14.42 0.206 L0234 2 47 14.51 0.190 L0234 2 48 14.65 0.213 L0234 2 49 14.70 0.309 L0234 2 50 14.84 0.415 L0234 2 51 14.89 0.503 L0234 2 52 15.02 0.563 L0234 2 53 15.12 0.583 L0234 2 54 15.24 0.597 L0234 2 55 15.37 0.554 L0234 2 56 15.45 0.435 L0234 2 57 15.53 0.393 L0234 2 58 15.63 0.368 L0234 2 59 15.75 0.309 L0234 2 60 15.82 0.192 L0234 2 61 15.93 0.091 L0234 2 62 16.02 0.047 L0234 2 63 16.13 0.028 L0234 2 64 16.24 0.125 L0234 2 65 16.32 0.201 L0234 2 66 16.40 0.179 L0234 2 67 16.52 0.190 L0234 2 68 16.59 0.228 L0234 2 69 16.71 0.265 L0234 2 70 16.83 0.282 L0234 2 71 16.91 0.312 L0234 2 72 16.99 0.339 L0234 2 73 17.14 0.375 L0234 2 74 17.22 0.453 L0234 2 75 17.33 0.505 L0234 2 76 17.43 0.555 L0234 2 77 17.51 0.602 L0234 2 78 17.64 0.646 L0234 2 79 17.69 0.680 L0234 2 80 17.83 0.691 L0234 2 81 17.93 0.721 L0234 2 82 18.04 0.837 L0234 2 83 18.14 1.020 L0234 2 84 18.21 1.238 L0234 2 85 18.32 1.431 L0234 2 86 18.43 1.573 L0234 2 87 18.54 1.622 L0234 2 88 18.61 1.645 L0234 2 89 18.73 1.689 L0234 2 90 18.81 1.789 L0234 2 91 18.92 1.935 L0234 2 92 19.02 1.935 L0234 2 93 19.13 1.838 L0234 2 94 19.21 1.827 L0234 2 95 19.29 1.858 L0234 2 96 19.42 1.865 L0234 2 97 19.54 1.840 L0234 2 98 19.61 1.797 L0234 2 99 19.69 1.816 L0234 2 100 19.81 1.853 L0234 2 101 19.92 1.854 L0234 2 102 20.00 1.872 L0234 2 103 20.11 1.870 L0234 2 104 20.20 1.874 L0234 2 105 20.30 1.824 L0234 2 106 20.43 1.722 L0234 2 107 20.51 1.681 L0234 2 108 20.64 1.588 L0234 2 109 20.68 1.548 L0234 2 110 20.81 1.528 L0234 2 111 20.92 1.445 L0234 2 112 20.99 1.417 L0234 2 113 21.13 1.211 L0234 2 114 21.21 1.045 L0234 2 115 21.34 1.354 L0234 2 116 21.43 1.878 L0234 2 117 21.49 2.236 L0234 2 118 21.61 2.375 L0234 2 119 21.67 2.481 L0234 2 120 21.78 2.595 L0234 2 121 21.85 2.697 L0234 2 122 21.96 2.791 L0234 2 123 22.08 2.751 L0234 2 124 22.28 2.850 L0234 2 125 22.39 2.757 L0234 2 126 22.47 2.732 L0234 2 127 22.56 2.780 L0234 2 128 22.68 2.769 L0234 2 129 22.76 2.834 L0234 2 130 22.88 2.845 L0234 2 131 22.98 2.861 L0234 2 132 23.06 2.912 L0234 2 133 23.12 2.872 L0234 2 134 23.23 2.921 L0234 2 135 23.36 2.953 L0234 2 136 23.46 2.919 L0234 2 137 23.56 2.942 L0234 2 138 23.66 2.839 L0234 2 139 23.80 2.750 L0234 2 140 23.86 2.576 L0234 2 141 23.96 2.328 L0234 2 142 24.10 2.279 L0234 2 143 24.21 2.173 L0234 2 144 24.28 2.049 L0234 2 145 24.39 1.950 L0234 2 146 24.51 1.737 L0234 2 147 24.60 1.615 L0234 2 148 24.68 1.485 L0234 2 149 24.77 1.404 L0234 2 150 24.89 1.431 L0234 2 151 25.03 1.132 L0234 2 152 ENDDATA 144 0 L0234 2 153 ENDSUBENT 152 0 L0234 299999 SUBENT L0234003 20180904 L038L0234 3 1 BIB 2 3 L0234 3 2 REACTION (7-N-14(G,N)7-N-13,,INT) L0234 3 3 STATUS (DEP,L0234002) L0234 3 4 (TABLE) page 238. L0234 3 5 ENDBIB 3 0 L0234 3 6 NOCOMMON 0 0 L0234 3 7 DATA 2 1 L0234 3 8 EN-MAX DATA L0234 3 9 MEV MB*MEV L0234 3 10 16.0 1.8 L0234 3 11 ENDDATA 3 0 L0234 3 12 ENDSUBENT 11 0 L0234 399999 ENDENTRY 3 0 L023499999999