ENTRY 12852 19831222 00001285200000001 SUBENT 12852001 19831222 00001285200100001 BIB 15 42 1285200100002 INSTITUTE (1USAANL) 1285200100003 REFERENCE (J,NSE,85,271,8311) 1285200100004 (R,ANL-NDM-83,8310) 1285200100005 AUTHOR (J.W.MEADOWS) 1285200100006 TITLE THE FISSION CROSS SECTION OF 237-NP RELATIVE TO 235-U 1285200100007 FROM 0.1 TO 9.4 MEV. 1285200100008 FACILITY (VDG) ARGONNE FAST NEUTRON GENERATOR. 1285200100009 METHOD (TOF) TIME-OF-FLIGHT 1285200100010 N-SOURCE (P-LI7) 7-LI(P,N) REACTION -0.13-4.6 MEV. 1285200100011 (D-D) D(D,N) REACTION - 4.6-9.4 MEV 1285200100012 DETECTOR (FISCH) DOUBLE IONIZATION CHAMBER. 1285200100013 MONITOR SAMPLE ISOTOPIC PURITY- 1285200100014 1.-93.244,2.-98.403,3.-94.421 PERCENT FOR 235-U 1285200100015 SAMPLE 237-NP SAMPLE WAS 100.0 PERCENT PURE. 1285200100016 COMMENT URANIUM ISOTOPE HALF-LIVES FROM HOLDEN,BNL-NCS-51320 1285200100017 NEPTUNIUM HALF LIFE FR0M BRAUER ET. AL.J.INORG. NUCL. 1285200100018 CHEM., 12,234,1960. 1285200100019 CORRECTION FOLLOWING CORRECTIONS WERE MADE FOR NP AND U SAMPLES. 1285200100020 . FISSION SPECTRUM EXTRAPOLATION TO ZERO BIAS. 1285200100021 . ROOM RETURN BACKGROUND. 1285200100022 . (D,N) REACTION WITH GAS TARGET STRUCTURE. 1285200100023 . NEUTRON SCATTERING IN DTECTOR AND TARGET STRUCTURE. 1285200100024 . FISSION FRAGMENT LOSS IN SAMPLE DEPOSITS. 1285200100025 ERR-ANALYS (ERR-S) STATISTICAL UNCERTAINTY 1285200100026 (ERR-T) TOTAL UNCERTAINTY INCLUDES THE FOLLOWING 1285200100027 NORMALIZATION UNCERTAINTIES- 1285200100028 . 233 U HALF-LIFE (0.04) 1285200100029 . 234 U HALF-LIFE (0.08) 1285200100030 . 237 NP HALF-LIFE (0.45) 1285200100031 . ISOTOPIC ANALYSIS (0.31) 1285200100032 . ISOTOPIC DELUTION (0.08) 1285200100033 . CALORIMETRY (0.08) 1285200100034 . ALPHA-COUNTING SYSTEM (0.30) 1285200100035 . THICKNESS CORRECTION (0.40) 1285200100036 . EXTRAPOLATION (0.20) 1285200100037 . SCATTERING COVECTION (0.30) 1285200100038 UNCERTAINTY DUE TO SECONDARY SOURCE REACTIONS 1285200100039 (20 PERCENT OF CORRECTION) ERROR IN NEUTRON ENERGY 1285200100040 (ABOUT 20 PERCENT OF ENERGY RESOLUTION) STATISTICAL 1285200100041 UNCERTAINTY 1285200100042 STATUS (APRVD) J.W.MEADOWS, 84/2/21. 1285200100043 HISTORY (831216C) 1285200100044 ENDBIB 42 0 1285200100045 NOCOMMON 0 0 1285200100046 ENDSUBENT 45 0 1285200199999 SUBENT 12852002 19831222 00001285200200001 BIB 2 4 1285200200002 REACTION 1((93-NP-237(N,F),,SIG)/(92-U-235(N,F),,SIG)) 1285200200003 2(93-NP-237(N,F),,SIG) 1285200200004 MONITOR RATIOS NORMALIZED BETWEEN 2.12 AND 2.53 MEV 1285200200005 2(92-U-235(N,F),,SIG) FROM ENDF/B-V 1285200200006 ENDBIB 4 0 1285200200007 NOCOMMON 0 0 1285200200008 DATA 6 66 1285200200009 EN EN-RSL-FW DATA 1ERR-S 1ERR-T 1DATA 21285200200010 MEV MEV NO-DIM PER-CENT PER-CENT B 1285200200011 0.131 0.062 0.0118 3.31 4.31 0.01765 1285200200012 0.234 0.060 0.0261 3.34 5.39 0.03452 1285200200013 0.286 0.056 0.0376 3.71 5.53 0.0477 1285200200014 0.335 0.056 0.0642 2.71 4.34 0.0798 1285200200015 0.387 0.054 0.1157 2.31 3.95 0.1406 1285200200016 0.438 0.052 0.2222 1.12 2.88 0.2644 1285200200017 0.489 0.052 0.3451 0.83 2.24 0.404 1285200200018 0.540 0.050 0.4788 0.75 1.80 0.554 1285200200019 0.641 0.048 0.7649 0.82 1.45 0.873 1285200200020 0.692 0.048 0.8718 0.69 1.23 0.992 1285200200021 0.741 0.048 0.9893 0.81 1.30 1.125 1285200200022 0.792 0.048 1.069 0.75 1.23 1.217 1285200200023 0.842 0.046 1.142 0.76 1.21 1.308 1285200200024 0.873 0.078 1.151 0.64 1.16 1.331 1285200200025 0.923 0.076 1.172 0.69 1.18 1.387 1285200200026 0.973 0.076 1.207 0.65 1.15 1.465 1285200200027 0.994 0.076 1.206 0.69 1.16 1.470 1285200200028 1.074 0.074 1.212 0.66 1.13 1.473 1285200200029 1.094 0.072 1.223 0.60 1.09 1.486 1285200200030 1.175 0.072 1.233 0.70 1.14 1.502 1285200200031 1.195 0.072 1.242 0.65 1.11 1.515 1285200200032 1.276 0.070 1.276 0.69 1.12 1.564 1285200200033 1.296 0.068 1.270 0.62 1.08 1.559 1285200200034 1.377 0.070 1.284 0.68 1.11 1.588 1285200200035 1.397 0.068 1.280 0.71 1.13 1.586 1285200200036 1.497 0.064 1.294 0.68 1.11 1.619 1285200200037 1.598 0.062 1.309 0.67 1.11 1.654 1285200200038 1.698 0.062 1.307 0.66 1.11 1.670 1285200200039 1.799 0.060 1.311 0.67 1.11 1.688 1285200200040 1.910 0.062 1.311 0.67 1.11 1.723 1285200200041 1.921 0.116 1.316 0.68 1.11 1.704 1285200200042 2.000 0.060 1.306 0.66 1.10 1.695 1285200200043 2.022 0.114 1.316 0.70 1.12 1.708 1285200200044 2.122 0.112 1.330 0.27 0.92 1.723 1285200200045 2.223 0.110 1.336 0.27 0.92 1.724 1285200200046 2.326 0.108 1.327 0.27 0.92 1.704 1285200200047 2.425 0.106 1.317 0.26 0.92 1.680 1285200200048 2.526 0.104 1.325 0.27 0.92 1.677 1285200200049 2.926 0.096 1.360 0.67 1.11 1.668 1285200200050 3.125 0.092 1.360 0.63 1.08 1.643 1285200200051 3.328 0.088 1.362 0.60 1.07 1.621 1285200200052 3.527 0.084 1.393 0.64 1.09 1.633 1285200200053 3.727 0.080 1.389 0.60 1.07 1.603 1285200200054 3.927 0.080 1.388 0.62 1.08 1.579 1285200200055 4.127 0.078 1.367 0.66 1.10 1.541 1285200200056 4.335 0.076 1.389 0.64 1.09 1.558 1285200200057 4.525 0.074 1.420 0.68 1.11 1.574 1285200200058 4.615 0.314 1.375 0.90 1.26 1.513 1285200200059 4.923 0.268 1.390 0.94 1.29 1.489 1285200200060 5.234 0.232 1.374 0.95 1.31 1.444 1285200200061 5.516 0.210 1.391 0.92 1.33 1.457 1285200200062 5.793 0.196 1.465 0.98 1.37 1.561 1285200200063 6.070 0.182 1.500 0.91 1.29 1.718 1285200200064 6.338 0.172 1.477 0.88 1.24 1.884 1285200200065 6.610 0.158 1.415 0.88 1.34 2.002 1285200200066 6.867 0.148 1.382 0.68 1.17 2.087 1285200200067 7.125 0.140 1.341 0.68 1.14 2.148 1285200200068 7.387 0.134 1.319 0.68 1.12 2.226 1285200200069 7.683 0.130 1.307 0.67 1.12 2.289 1285200200070 7.893 0.126 1.290 0.67 1.12 2.288 1285200200071 8.141 0.124 1.267 0.66 1.11 2.260 1285200200072 8.392 0.122 1.263 0.65 1.10 2.252 1285200200073 8.638 0.120 1.207 1.22 1.51 2.148 1285200200074 8.884 0.120 1.231 0.97 1.31 2.184 1285200200075 9.127 0.120 1.224 0.96 1.30 2.166 1285200200076 9.374 0.120 1.226 0.96 1.30 2.163 1285200200077 ENDDATA 68 0 1285200200078 ENDSUBENT 77 0 1285200299999 ENDENTRY 2 0 1285299999999