ENTRY 10951 20140922 14031095100000001 SUBENT 10951001 20140922 14031095100100001 BIB 11 24 1095100100002 TITLE 237Np Fission Cross Section Measurements in the MeV 1095100100003 Energy Region 1095100100004 AUTHOR (A.D.Carlson,B.H.Patrick) 1095100100005 REFERENCE (C,79KNOX,,971,197910) 1095100100006 INSTITUTE (1USANBS) 1095100100007 FACILITY (LINAC,1USANBS) NBS linac neutron TOF facility. 1095100100008 SAMPLE The detector contained five fission foils with 100 1095100100009 microg/cm2 deposits of 237Np evaporated onto both 1095100100010 sides of 0.0025 cm aluminum backings. 1095100100011 PART-DET (N,P) 1095100100012 DETECTOR (IOCH,TELES) Multiplate fission ionization chambers. 1095100100013 METHOD (TOF,REC) Two (237Np and 235U) fission chambers were 1095100100014 located at the 63.65-m flight path. An annular proton 1095100100015 telescope and polyethylene films were used to measure 1095100100016 the energy dependence of the neutron flux. 1095100100017 ANALYSIS The shape of the neutron flux was obtained by 1095100100018 dividing the count rate vs. TOF data from proton 1095100100019 telescope by the hydrogen scattering cross section, 1095100100020 taking into account the angular range of the proton 1095100100021 recoils. The fission chamber data were then divided 1095100100022 by the flux which had been interpolated to the same 1095100100023 energy mesh. 1095100100024 HISTORY (19890124C) 1095100100025 (20140922A) BP: Updated entry, digitized Figs. 8-10. 1095100100026 ENDBIB 24 0 1095100100027 COMMON 2 3 1095100100028 ERR-2 ERR-3 1095100100029 PER-CENT PER-CENT 1095100100030 0.2 0.5 1095100100031 ENDCOMMON 3 0 1095100100032 ENDSUBENT 31 0 1095100199999 SUBENT 10951002 20140922 14031095100200001 BIB 5 14 1095100200002 REACTION ((93-NP-237(N,F),,SIG)/(92-U-235(N,F),,SIG)) 1095100200003 ERR-ANALYS (ERR-T) Total uncertainty 1095100200004 (ERR-S,2.,3.) statistical uncertainty. 1095100200005 (ERR-1,,0.1) transmission corrections. 1095100200006 (ERR-2) hydrogen scattering angular distribution. 1095100200007 (ERR-3) walk correction. 1095100200008 (ERR-4,,0.1) fission fragment angular distribution. 1095100200009 (ERR-5,,0.1) dead time. 1095100200010 (ERR-6,,0.1) fission chamber background. 1095100200011 MONITOR ((93-NP-237(N,F),,SIG)/(92-U-235(N,F),,SIG)) 1095100200012 The present data were normalized to Behrens et al. 1095100200013 between 1 and 2 MeV. 1095100200014 MONIT-REF (,J.W.Behrens+,R,UCID-17370,1977) 1095100200015 STATUS (CURVE) Fig. 8-9, page 974. 1095100200016 ENDBIB 14 0 1095100200017 COMMON 2 3 1095100200018 EN-NRM-MIN EN-NRM-MAX 1095100200019 MEV MEV 1095100200020 1. 2. 1095100200021 ENDCOMMON 3 0 1095100200022 DATA 3 97 1095100200023 EN DATA ERR-T 1095100200024 MEV NO-DIM NO-DIM 1095100200025 0.478 0.360 1095100200026 0.497 0.401 1095100200027 0.524 0.449 1095100200028 0.541 0.495 1095100200029 0.566 0.535 1095100200030 0.585 0.595 1095100200031 0.604 0.660 1095100200032 0.622 0.710 1095100200033 0.644 0.780 1095100200034 0.661 0.813 1095100200035 0.685 0.866 1095100200036 0.717 0.945 1095100200037 0.739 0.991 1095100200038 0.764 1.031 1095100200039 0.783 1.041 1095100200040 0.800 1.046 1095100200041 0.825 1.065 1095100200042 0.842 1.101 1095100200043 0.859 1.122 1095100200044 0.884 1.108 1095100200045 0.903 1.105 1095100200046 0.952 1.125 1095100200047 1.003 1.139 1095100200048 1.052 1.172 1095100200049 1.103 1.201 1095100200050 1.155 1.199 1095100200051 1.204 1.206 1095100200052 1.248 1.203 1095100200053 1.306 1.203 1095100200054 1.353 1.198 1095100200055 1.406 1.215 1095100200056 1.453 1.220 1095100200057 1.504 1.234 1095100200058 1.599 1.246 1095100200059 1.702 1.256 1095100200060 1.800 1.248 1095100200061 1.900 1.255 1095100200062 1.995 1.265 1095100200063 2.100 1.248 1095100200064 2.198 1.221 1095100200065 2.303 1.226 1095100200066 2.403 1.243 1095100200067 2.503 1.266 1095100200068 2.601 1.288 1095100200069 2.689 1.307 1095100200070 2.796 1.307 1095100200071 2.899 1.304 1095100200072 3.001 1.278 1095100200073 3.102 1.261 1095100200074 3.202 1.263 1095100200075 3.246 1.370 1095100200076 3.302 1.258 1095100200077 3.318 1.394 0.024 1095100200078 3.400 1.253 1095100200079 3.502 1.258 1095100200080 3.556 1.368 1095100200081 3.696 1.374 0.031 1095100200082 3.893 1.379 1095100200083 3.923 1.414 1095100200084 4.104 1.376 1095100200085 4.259 1.369 1095100200086 4.471 1.396 1095100200087 4.596 1.369 1095100200088 4.721 1.327 1095100200089 4.891 1.358 1095100200090 5.173 1.378 1095100200091 5.385 1.417 1095100200092 5.581 1.396 1095100200093 5.765 1.412 1095100200094 5.934 1.429 1095100200095 6.132 1.458 1095100200096 6.356 1.432 0.035 1095100200097 6.623 1.435 1095100200098 6.846 1.373 1095100200099 7.082 1.311 1095100200100 7.319 1.250 1095100200101 7.642 1.237 1095100200102 7.924 1.268 0.034 1095100200103 8.277 1.296 1095100200104 8.570 1.250 1095100200105 8.949 1.232 1095100200106 9.273 1.236 1095100200107 9.670 1.336 1095100200108 10.121 1.358 0.037 1095100200109 10.595 1.242 1095100200110 11.100 1.218 1095100200111 11.620 1.214 1095100200112 12.223 1.163 1095100200113 12.796 1.082 1095100200114 13.497 1.038 0.035 1095100200115 14.227 0.994 1095100200116 15.026 0.931 1095100200117 15.868 0.904 1095100200118 16.727 0.937 1095100200119 17.813 1.033 0.047 1095100200120 18.940 1.069 1095100200121 19.937 1.040 1095100200122 ENDDATA 99 0 1095100200123 ENDSUBENT 122 0 1095100299999 SUBENT 10951003 20140922 14031095100300001 BIB 7 16 1095100300002 REACTION (93-NP-237(N,F),,SIG) 1095100300003 METHOD (TOF,REC) The data were measured relative to the 1095100300004 hydrogen scattering cross section with an annular 1095100300005 proton telescope. 1095100300006 ERR-ANALYS (ERR-T,2.,3.) 1095100300007 (ERR-S,2.,3.) statistical uncertainty. 1095100300008 (ERR-1,,0.1) transmission corrections. 1095100300009 (ERR-2) hydrogen scattering angular distribution. 1095100300010 (ERR-3) walk correction. 1095100300011 (ERR-4,,0.1) fission fragment angular distribution. 1095100300012 (ERR-5,,0.1) dead time. 1095100300013 (ERR-6,,0.1) fission chamber background. 1095100300014 MONITOR (1-H-1(N,EL)1-H-1,,SIG) 1095100300015 MONIT-REF (,J.C.Hopkins+,J,ND/A,9,137,1971) 1095100300016 STATUS (CURVE) Fig. 10, page 975. 1095100300017 HISTORY (20140922C) BP 1095100300018 ENDBIB 16 0 1095100300019 NOCOMMON 0 0 1095100300020 DATA 2 54 1095100300021 EN DATA 1095100300022 MEV B 1095100300023 1.113 1.431 1095100300024 1.271 1.467 1095100300025 1.415 1.507 1095100300026 1.529 1.558 1095100300027 1.615 1.576 1095100300028 1.745 1.592 1095100300029 1.933 1.597 1095100300030 2.079 1.568 1095100300031 2.239 1.574 1095100300032 2.441 1.593 1095100300033 2.629 1.606 1095100300034 2.833 1.559 1095100300035 2.936 1.516 1095100300036 2.995 1.474 1095100300037 3.213 1.472 1095100300038 3.371 1.498 1095100300039 3.431 1.455 1095100300040 3.562 1.426 1095100300041 3.751 1.421 1095100300042 3.778 1.465 1095100300043 3.895 1.445 1095100300044 4.100 1.389 1095100300045 4.534 1.417 1095100300046 4.546 1.463 1095100300047 4.868 1.392 1095100300048 4.957 1.338 1095100300049 5.189 1.338 1095100300050 5.347 1.367 1095100300051 5.506 1.383 1095100300052 6.152 1.565 1095100300053 6.206 1.678 1095100300054 6.506 1.841 1095100300055 6.751 1.897 1095100300056 7.315 1.930 1095100300057 7.589 1.985 1095100300058 7.877 2.084 1095100300059 8.122 2.147 1095100300060 8.530 2.057 1095100300061 8.850 2.004 1095100300062 9.286 1.955 1095100300063 9.660 2.045 1095100300064 10.110 2.032 1095100300065 10.548 1.921 1095100300066 11.099 1.884 1095100300067 11.649 1.910 1095100300068 12.185 1.943 1095100300069 12.737 1.896 1095100300070 13.418 1.874 1095100300071 14.244 1.897 1095100300072 14.997 1.923 1095100300073 15.825 1.856 1095100300074 16.736 1.935 1095100300075 17.790 2.097 1095100300076 18.910 1.935 1095100300077 ENDDATA 56 0 1095100300078 ENDSUBENT 77 0 1095100399999 ENDENTRY 3 0 1095199999999