ENTRY L0045 19970129 0000L004500000001 SUBENT L0045001 19970129 0000L004500100001 BIB 14 34 L004500100002 INSTITUTE (2GERJLU) L004500100003 REFERENCE (J,NP/A,272,125,76) L004500100004 AUTHOR (U.KNEISSL,K.H.LEISTER,H.O.NEIDEL,A.WELLER) L004500100005 TITLE Photoneutron cross sections for 18O. L004500100006 FACILITY (LINAC,2GERJLU) 65-MeV electron accelerator. L004500100007 INC-SOURCE (QMPH,ARAD) Positron annihilation in flight. L004500100008 Photon energy resolution is about 200 keV at 10 MeV andL004500100009 increases to about 300 keV at 30 MeV. L004500100010 DETECTOR (STANK) 500 l Gd-loaded 4pi liquid scintillator tank. L004500100011 Photon flux monitored using Faraday cup. L004500100012 SAMPLE Target consisted of a polyethylene container filled L004500100013 with 1000 grams of H2O (18O purity > 99.6%). L004500100014 Target thickness 23.6 g/cm**2. L004500100015 METHOD (EXTB,STATD) Statistically determined neutron L004500100016 multiplicity. L004500100017 MONITOR Detector efficiency determined using a 252Cf L004500100018 spontaneous fission source. L004500100019 ANALYSIS The (gamma,2n) cross section was evaluated from the L004500100020 measured multiplicities by the moments method L004500100021 (see F.R.Krueger, Nuc.Instr.Meth., 125, 285 (1975)) L004500100022 ERR-ANALYS (DATA-ERR1) Statistical errors only. L004500100023 (DATA-ERR2) Due to uncertainty in absolute calibration L004500100024 of the photon flux, absolute cross section values haveL004500100025 systematic uncertainties of about 10%. L004500100026 COMMENT Cross sections show pronounced structure in particular L004500100027 at energies below the main giant dipole resonance. TheL004500100028 (gamma,2n) cross section is large in the whole energy L004500100029 region. L004500100030 The integrated total photoneutron cross section amount L004500100031 to 0.53 in units of the classical dipole sum. L004500100032 No pronounced isospin splitting could be observed in L004500100033 the photoneutron decay channel. L004500100034 HISTORY (891207C) L004500100035 (950406A) BIB Updated. L004500100036 ENDBIB 34 0 L004500100037 COMMON 1 3 L004500100038 DATA-ERR2 L004500100039 PER-CENT L004500100040 10. L004500100041 ENDCOMMON 3 0 L004500100042 ENDSUBENT 41 0 L004500199999 SUBENT L0045002 19970129 0000L004500200001 BIB 2 3 L004500200002 REACTION ((8-O-18(G,N)8-O-17,,SIG)+(8-O-18(G,N+P)7-N-16,,SIG)) L004500200003 Threshold of the reaction (gamma,n+p) is 21.8 MeV. L004500200004 STATUS Converted from Berman compilation. L004500200005 ENDBIB 3 0 L004500200006 NOCOMMON 0 0 L004500200007 DATA 3 133 L004500200008 EN DATA DATA-ERR1 L004500200009 MEV MB MB L004500200010 8.199 0.85 0.447 L004500200011 8.494 0.01 0.407 L004500200012 8.844 0.57 0.380 L004500200013 9.176 1.27 0.400 L004500200014 9.342 1.04 0.419 L004500200015 9.508 1.91 0.739 L004500200016 9.674 1.29 0.681 L004500200017 9.840 2.79 0.631 L004500200018 10.024 1.96 0.575 L004500200019 10.171 3.51 0.470 L004500200020 10.337 3.47 0.475 L004500200021 10.503 2.54 0.446 L004500200022 10.669 2.11 0.428 L004500200023 10.835 1.41 0.404 L004500200024 10.983 2.72 0.385 L004500200025 11.167 5.40 0.391 L004500200026 11.315 6.25 0.376 L004500200027 11.481 4.46 0.359 L004500200028 11.666 3.80 0.368 L004500200029 11.832 2.98 0.346 L004500200030 11.998 1.10 0.330 L004500200031 12.164 1.18 0.294 L004500200032 12.348 2.34 0.286 L004500200033 12.496 2.26 0.267 L004500200034 12.662 2.79 0.271 L004500200035 12.828 3.86 0.491 L004500200036 12.994 4.12 0.481 L004500200037 13.160 3.26 0.474 L004500200038 13.326 2.83 0.458 L004500200039 13.492 3.89 0.479 L004500200040 13.658 3.87 0.467 L004500200041 13.824 3.07 0.459 L004500200042 14.009 3.46 0.462 L004500200043 14.175 4.46 0.468 L004500200044 14.341 6.39 0.477 L004500200045 14.507 8.02 0.503 L004500200046 14.673 6.44 0.491 L004500200047 14.839 4.31 0.476 L004500200048 15.005 2.93 0.452 L004500200049 15.171 2.48 0.442 L004500200050 15.338 2.71 0.461 L004500200051 15.504 3.62 0.524 L004500200052 15.651 3.53 0.510 L004500200053 15.836 2.99 0.493 L004500200054 16.002 2.49 0.495 L004500200055 16.168 2.83 0.501 L004500200056 16.334 2.94 0.505 L004500200057 16.500 2.50 0.495 L004500200058 16.666 2.99 0.491 L004500200059 16.833 3.10 0.497 L004500200060 16.999 3.09 0.502 L004500200061 17.165 3.02 0.501 L004500200062 17.331 2.89 0.499 L004500200063 17.497 2.70 0.506 L004500200064 17.663 3.04 0.510 L004500200065 17.829 2.94 0.500 L004500200066 17.995 2.70 0.492 L004500200067 18.162 2.41 0.499 L004500200068 18.328 2.49 0.494 L004500200069 18.494 2.56 0.500 L004500200070 18.660 2.93 0.524 L004500200071 18.844 2.51 0.532 L004500200072 18.992 3.31 0.523 L004500200073 19.158 3.24 0.522 L004500200074 19.324 2.76 0.521 L004500200075 19.509 2.75 0.516 L004500200076 19.675 3.39 0.525 L004500200077 19.804 3.56 0.524 L004500200078 20.007 3.57 0.513 L004500200079 20.174 3.96 0.525 L004500200080 20.340 2.71 0.532 L004500200081 20.506 3.46 0.532 L004500200082 20.672 3.89 0.548 L004500200083 20.838 3.60 0.559 L004500200084 21.004 3.65 0.562 L004500200085 21.170 5.15 0.567 L004500200086 21.337 4.40 0.572 L004500200087 21.503 4.27 0.573 L004500200088 21.669 3.60 0.566 L004500200089 21.835 3.60 0.610 L004500200090 22.001 4.01 0.618 L004500200091 22.167 4.83 0.642 L004500200092 22.333 5.85 0.657 L004500200093 22.500 4.31 0.687 L004500200094 22.666 4.08 0.679 L004500200095 22.832 5.23 0.666 L004500200096 22.998 5.58 0.698 L004500200097 23.164 6.02 0.758 L004500200098 23.330 6.39 0.767 L004500200099 23.497 6.00 0.774 L004500200100 23.663 5.77 0.762 L004500200101 23.829 5.48 0.745 L004500200102 23.995 4.50 0.724 L004500200103 24.161 3.45 0.735 L004500200104 24.327 4.42 0.710 L004500200105 24.493 3.58 0.726 L004500200106 24.660 3.17 0.729 L004500200107 24.826 3.19 0.722 L004500200108 24.992 3.75 0.779 L004500200109 25.158 3.57 0.805 L004500200110 25.324 3.26 0.799 L004500200111 25.509 2.49 0.832 L004500200112 25.675 2.63 0.841 L004500200113 25.841 1.97 0.800 L004500200114 26.007 3.13 0.808 L004500200115 26.247 4.00 0.801 L004500200116 26.506 3.58 0.873 L004500200117 26.746 3.49 0.913 L004500200118 27.004 2.13 0.932 L004500200119 27.244 1.33 0.930 L004500200120 27.503 1.65 0.964 L004500200121 27.743 3.32 0.967 L004500200122 28.001 3.06 1.000 L004500200123 28.241 3.66 0.977 L004500200124 28.500 4.29 1.018 L004500200125 28.758 4.42 1.023 L004500200126 28.998 3.68 1.048 L004500200127 29.257 3.61 1.046 L004500200128 29.497 4.70 1.064 L004500200129 29.755 4.82 1.074 L004500200130 29.995 4.85 1.142 L004500200131 30.254 5.34 1.146 L004500200132 30.494 6.53 1.190 L004500200133 30.752 8.07 1.185 L004500200134 31.011 5.76 1.144 L004500200135 31.251 6.49 1.132 L004500200136 31.491 7.18 1.143 L004500200137 31.749 6.70 1.179 L004500200138 32.008 6.06 1.189 L004500200139 32.266 6.16 1.201 L004500200140 32.506 7.00 1.207 L004500200141 32.746 6.28 1.201 L004500200142 33.005 6.60 1.240 L004500200143 ENDDATA 135 0 L004500200144 ENDSUBENT 143 0 L004500299999 SUBENT L0045003 19970129 0000L004500300001 BIB 3 5 L004500300002 REACTION ((8-O-18(G,2N)8-O-16,,SIG)+ L004500300003 (8-O-18(G,2N+P)7-N-15,,SIG)) L004500300004 Threshold of (gamma,2n+p) reaction is 24.3 MeV. L004500300005 STATUS Converted from Berman compilation. L004500300006 HISTORY (950406A) REACTION corrected. L004500300007 ENDBIB 5 0 L004500300008 NOCOMMON 0 0 L004500300009 DATA 3 118 L004500300010 EN DATA DATA-ERR1 L004500300011 MEV MB MB L004500300012 11.167 -0.01 0.238 L004500300013 11.315 0.06 0.227 L004500300014 11.481 0.09 0.232 L004500300015 11.666 0.08 0.219 L004500300016 11.832 -0.09 0.215 L004500300017 11.998 0.05 0.210 L004500300018 12.164 0.03 0.208 L004500300019 12.348 0.02 0.210 L004500300020 12.496 0.02 0.203 L004500300021 12.662 -0.24 0.201 L004500300022 12.828 0.40 0.209 L004500300023 12.994 0.36 0.207 L004500300024 13.160 0.43 0.206 L004500300025 13.326 0.23 0.202 L004500300026 13.492 0.54 0.212 L004500300027 13.658 0.51 0.207 L004500300028 13.824 0.41 0.202 L004500300029 14.009 0.50 0.205 L004500300030 14.175 0.55 0.212 L004500300031 14.341 0.82 0.218 L004500300032 14.507 1.41 0.231 L004500300033 14.673 1.34 0.226 L004500300034 14.839 1.24 0.218 L004500300035 15.005 1.03 0.206 L004500300036 15.171 0.95 0.201 L004500300037 15.338 1.48 0.211 L004500300038 15.504 2.59 0.245 L004500300039 15.651 2.32 0.237 L004500300040 15.836 2.14 0.229 L004500300041 16.002 2.26 0.230 L004500300042 16.168 2.40 0.232 L004500300043 16.334 2.43 0.234 L004500300044 16.500 2.37 0.229 L004500300045 16.666 2.20 0.226 L004500300046 16.833 2.35 0.229 L004500300047 16.999 2.39 0.230 L004500300048 17.165 2.47 0.231 L004500300049 17.331 2.37 0.229 L004500300050 17.497 2.68 0.232 L004500300051 17.663 2.63 0.233 L004500300052 17.829 2.45 0.228 L004500300053 17.995 2.37 0.224 L004500300054 18.162 2.55 0.227 L004500300055 18.328 2.39 0.224 L004500300056 18.494 2.38 0.227 L004500300057 18.660 2.91 0.238 L004500300058 18.844 3.05 0.242 L004500300059 18.992 2.79 0.237 L004500300060 19.158 2.65 0.236 L004500300061 19.324 2.74 0.235 L004500300062 19.509 2.55 0.232 L004500300063 19.675 2.69 0.236 L004500300064 19.804 2.54 0.235 L004500300065 20.007 2.14 0.229 L004500300066 20.174 2.42 0.234 L004500300067 20.340 2.58 0.238 L004500300068 20.506 2.43 0.238 L004500300069 20.672 2.82 0.245 L004500300070 20.838 3.00 0.251 L004500300071 21.004 2.95 0.252 L004500300072 21.170 2.87 0.252 L004500300073 21.337 2.96 0.255 L004500300074 21.503 2.89 0.255 L004500300075 21.669 2.73 0.251 L004500300076 21.835 3.17 0.279 L004500300077 22.001 3.12 0.282 L004500300078 22.167 3.37 0.293 L004500300079 22.333 3.42 0.300 L004500300080 22.500 4.06 0.315 L004500300081 22.666 3.92 0.310 L004500300082 22.832 3.65 0.304 L004500300083 22.998 4.23 0.319 L004500300084 23.164 5.35 0.348 L004500300085 23.330 5.22 0.352 L004500300086 23.497 5.29 0.355 L004500300087 23.663 4.94 0.348 L004500300088 23.829 4.44 0.339 L004500300089 23.995 3.88 0.329 L004500300090 24.161 3.62 0.333 L004500300091 24.327 3.05 0.321 L004500300092 24.493 3.07 0.328 L004500300093 24.660 2.96 0.329 L004500300094 24.826 2.52 0.325 L004500300095 24.992 2.89 0.357 L004500300096 25.158 3.46 0.369 L004500300097 25.324 3.08 0.366 L004500300098 25.509 3.60 0.382 L004500300099 25.675 3.54 0.386 L004500300100 25.841 3.17 0.360 L004500300101 26.007 2.95 0.362 L004500300102 26.247 2.36 0.357 L004500300103 26.506 2.75 0.399 L004500300104 26.746 2.81 0.420 L004500300105 27.004 3.10 0.429 L004500300106 27.244 2.89 0.428 L004500300107 27.503 3.15 0.443 L004500300108 27.743 2.73 0.442 L004500300109 28.001 3.29 0.458 L004500300110 28.241 2.29 0.445 L004500300111 28.500 2.63 0.464 L004500300112 28.758 2.44 0.465 L004500300113 28.998 2.73 0.477 L004500300114 29.257 2.33 0.475 L004500300115 29.497 2.28 0.481 L004500300116 29.755 2.07 0.485 L004500300117 29.995 2.02 0.525 L004500300118 30.254 1.71 0.525 L004500300119 30.494 2.12 0.544 L004500300120 30.752 1.43 0.539 L004500300121 31.011 1.62 0.512 L004500300122 31.251 1.07 0.504 L004500300123 31.491 0.89 0.507 L004500300124 31.749 1.61 0.523 L004500300125 32.008 1.58 0.527 L004500300126 32.266 1.65 0.530 L004500300127 32.506 1.43 0.530 L004500300128 32.746 1.04 0.526 L004500300129 33.005 1.57 0.542 L004500300130 ENDDATA 120 0 L004500300131 ENDSUBENT 130 0 L004500399999 SUBENT L0045004 19970129 0000L004500400001 BIB 2 3 L004500400002 REACTION (8-O-18(G,X)0-NN-1,,SIG) L004500400003 The sum: (G,N)+(G,N+P)+2(G,2N)+2(G,2N+P). L004500400004 STATUS Converted from Berman compilation. L004500400005 ENDBIB 3 0 L004500400006 NOCOMMON 0 0 L004500400007 DATA 3 133 L004500400008 EN DATA DATA-ERR1 L004500400009 MEV MB MB L004500400010 8.199 0.85 0.447 L004500400011 8.494 0.01 0.407 L004500400012 8.844 0.57 0.380 L004500400013 9.176 1.27 0.400 L004500400014 9.342 1.04 0.419 L004500400015 9.508 1.91 0.739 L004500400016 9.674 1.29 0.681 L004500400017 9.840 2.79 0.631 L004500400018 10.024 1.96 0.575 L004500400019 10.171 3.51 0.470 L004500400020 10.337 3.47 0.475 L004500400021 10.503 2.54 0.446 L004500400022 10.669 2.11 0.428 L004500400023 10.835 1.41 0.404 L004500400024 10.983 2.72 0.385 L004500400025 11.167 5.40 0.391 L004500400026 11.315 6.25 0.376 L004500400027 11.481 4.46 0.359 L004500400028 11.666 3.80 0.368 L004500400029 11.832 2.98 0.346 L004500400030 11.998 1.10 0.330 L004500400031 12.164 1.18 0.294 L004500400032 12.348 2.34 0.286 L004500400033 12.496 2.26 0.267 L004500400034 12.662 2.79 0.271 L004500400035 12.828 4.66 0.257 L004500400036 12.994 4.84 0.245 L004500400037 13.160 4.12 0.235 L004500400038 13.326 3.29 0.216 L004500400039 13.492 4.97 0.222 L004500400040 13.658 4.89 0.217 L004500400041 13.824 3.89 0.217 L004500400042 14.009 4.46 0.213 L004500400043 14.175 5.56 0.199 L004500400044 14.341 8.03 0.194 L004500400045 14.507 10.84 0.198 L004500400046 14.673 9.12 0.193 L004500400047 14.839 6.79 0.190 L004500400048 15.005 4.99 0.186 L004500400049 15.171 4.38 0.183 L004500400050 15.338 5.67 0.186 L004500400051 15.504 8.80 0.187 L004500400052 15.651 8.17 0.187 L004500400053 15.836 7.27 0.183 L004500400054 16.002 7.01 0.184 L004500400055 16.168 7.63 0.189 L004500400056 16.334 7.80 0.189 L004500400057 16.500 7.24 0.189 L004500400058 16.666 7.39 0.192 L004500400059 16.833 7.80 0.192 L004500400060 16.999 8.03 0.197 L004500400061 17.165 7.80 0.198 L004500400062 17.331 7.63 0.199 L004500400063 17.497 8.06 0.203 L004500400064 17.663 8.30 0.207 L004500400065 17.829 7.84 0.204 L004500400066 17.995 7.44 0.204 L004500400067 18.162 7.51 0.207 L004500400068 18.328 7.27 0.208 L004500400069 18.494 7.32 0.210 L004500400070 18.660 8.75 0.218 L004500400071 18.844 8.61 0.221 L004500400072 18.992 8.89 0.222 L004500400073 19.158 8.54 0.223 L004500400074 19.324 8.24 0.224 L004500400075 19.509 7.85 0.225 L004500400076 19.675 8.77 0.230 L004500400077 19.804 8.64 0.231 L004500400078 20.007 7.85 0.231 L004500400079 20.174 8.80 0.239 L004500400080 20.340 7.87 0.237 L004500400081 20.506 8.32 0.238 L004500400082 20.672 9.53 0.245 L004500400083 20.838 9.60 0.246 L004500400084 21.004 9.55 0.249 L004500400085 21.170 10.89 0.259 L004500400086 21.337 10.32 0.260 L004500400087 21.503 10.05 0.261 L004500400088 21.669 9.06 0.261 L004500400089 21.835 9.94 0.247 L004500400090 22.001 10.25 0.253 L004500400091 22.167 11.57 0.263 L004500400092 22.333 12.69 0.268 L004500400093 22.500 12.43 0.273 L004500400094 22.666 11.92 0.277 L004500400095 22.832 12.53 0.273 L004500400096 22.998 14.04 0.283 L004500400097 23.164 16.72 0.301 L004500400098 23.330 16.83 0.305 L004500400099 23.497 16.58 0.308 L004500400100 23.663 15.65 0.311 L004500400101 23.829 14.36 0.308 L004500400102 23.995 12.26 0.301 L004500400103 24.161 10.69 0.310 L004500400104 24.327 10.52 0.303 L004500400105 24.493 9.72 0.312 L004500400106 24.660 9.09 0.314 L004500400107 24.826 8.23 0.315 L004500400108 24.992 9.53 0.312 L004500400109 25.158 10.49 0.322 L004500400110 25.324 9.42 0.321 L004500400111 25.509 9.69 0.329 L004500400112 25.675 9.71 0.334 L004500400113 25.841 8.31 0.349 L004500400114 26.007 9.03 0.358 L004500400115 26.247 8.72 0.363 L004500400116 26.506 9.08 0.353 L004500400117 26.746 9.11 0.358 L004500400118 27.004 8.33 0.365 L004500400119 27.244 7.11 0.364 L004500400120 27.503 7.95 0.379 L004500400121 27.743 8.78 0.392 L004500400122 28.001 9.64 0.402 L004500400123 28.241 8.24 0.403 L004500400124 28.500 9.55 0.419 L004500400125 28.758 9.30 0.427 L004500400126 28.998 9.14 0.435 L004500400127 29.257 8.27 0.438 L004500400128 29.497 9.26 0.454 L004500400129 29.755 8.96 0.461 L004500400130 29.995 8.89 0.450 L004500400131 30.254 8.76 0.458 L004500400132 30.494 10.77 0.481 L004500400133 30.752 10.93 0.492 L004500400134 31.011 9.00 0.509 L004500400135 31.251 8.63 0.515 L004500400136 31.491 8.96 0.527 L004500400137 31.749 9.92 0.544 L004500400138 32.008 9.22 0.550 L004500400139 32.266 9.46 0.564 L004500400140 32.506 9.86 0.578 L004500400141 32.746 8.36 0.579 L004500400142 33.005 9.74 0.603 L004500400143 ENDDATA 135 0 L004500400144 ENDSUBENT 143 0 L004500499999 SUBENT L0045005 19970129 0000L004500500001 BIB 2 3 L004500500002 REACTION (8-O-18(G,X)0-NN-1,,INT) L004500500003 The sum: (G,N)+(G,N+P)+2(G,2N)+2(G,2N+P). L004500500004 STATUS (DEP,L0045004) Data taken from text of article L004500500005 ENDBIB 3 0 L004500500006 NOCOMMON 0 0 L004500500007 DATA 3 1 L004500500008 EN-MIN EN-MAX DATA L004500500009 MEV MEV MB*MEV L004500500010 0.0 33. 191. L004500500011 ENDDATA 3 0 L004500500012 ENDSUBENT 11 0 L004500599999 SUBENT L0045006 19970129 0000L004500600001 BIB 2 2 L004500600002 REACTION (8-O-18(G,2N)8-O-16,,INT) L004500600003 STATUS (DEP,L0045003) Data taken from text of article L004500600004 ENDBIB 2 0 L004500600005 NOCOMMON 0 0 L004500600006 DATA 3 1 L004500600007 EN-MIN EN-MAX DATA L004500600008 MEV MEV MB*MEV L004500600009 0.0 35. 49. L004500600010 ENDDATA 3 0 L004500600011 ENDSUBENT 10 0 L004500699999 SUBENT L0045007 19970129 0000L004500700001 BIB 2 2 L004500700002 REACTION ((8-O-18(G,N)8-O-17,,INT)+(8-O-18(G,N+P)7-N-16,,INT)) L004500700003 STATUS (DEP,L0045002) Data taken from text of article L004500700004 ENDBIB 2 0 L004500700005 NOCOMMON 0 0 L004500700006 DATA 3 1 L004500700007 EN-MIN EN-MAX DATA L004500700008 MEV MEV MB*MEV L004500700009 0.0 35. 93. L004500700010 ENDDATA 3 0 L004500700011 ENDSUBENT 10 0 L004500799999 SUBENT L0045008 19970129 0000L004500800001 BIB 2 4 L004500800002 REACTION ((8-O-18(G,N)8-O-17,,INT)+(8-O-18(G,N+P)7-N-16,,INT)+ L004500800003 (8-O-18(G,2N)8-O-16,,INT)) L004500800004 STATUS (DEP,L0045002) Data taken from text of article L004500800005 (DEP,L0045003) L004500800006 ENDBIB 4 0 L004500800007 NOCOMMON 0 0 L004500800008 DATA 3 1 L004500800009 EN-MIN EN-MAX DATA L004500800010 MEV MEV MB*MEV L004500800011 0.0 35. 142. L004500800012 ENDDATA 3 0 L004500800013 ENDSUBENT 12 0 L004500899999 ENDENTRY 8 0 L004599999999