ENTRY 10993 20180521 14411099300000001 SUBENT 10993001 20180521 14411099300100001 BIB 12 31 1099300100002 TITLE Fission Neutron Multiplicity for the 242mAm(n,f) 1099300100003 Reaction 1099300100004 AUTHOR (R.E.Howe,J.C.Browne,R.J.Dougan,R.J.Dupzyk,J.H.Landrum)1099300100005 REFERENCE (J,NSE,77,454,1981) 1099300100006 #doi:10.13182/NSE81-A18958 1099300100007 INSTITUTE (1USALRL) 1099300100008 FACILITY (LINAC,1USALRL) 100-MeV electron Linac. 1099300100009 INC-SOURCE (EVAP) Electrons on Ta target. 1099300100010 INC-SPECT Uncertainty in energy scale 40 keV at 4 MeV and 440 1099300100011 keV at 20 MeV. 1099300100012 DETECTOR (IOCH) 2 Hemispherical ionization chambers for Am 1099300100013 fission fragments. Flat plate ionization chamber for 1099300100014 U fission fragments. 1099300100015 (SCIN) Liquid benzene scintillator for fission neutrons1099300100016 SAMPLE (95-AM-242-M,ENR=0.992) Two ~400 microg americium 1099300100017 samples. 1099300100018 METHOD (TOF,PSD) The fission chambers were located at a 1099300100019 distance of 13.4 m from a water-cooled tantalum 1099300100020 target. The incident neutron energy was measured 1099300100021 using TOF. Signals produced in the liquid 1099300100022 scintillator were analyzed for pulse shape to 1099300100023 distinguish neutrons from gamma rays. A separate 1099300100024 fission chamber with 8.3 mg of 235U was situated 1099300100025 between two 242mAm chambers and provided 1099300100026 normalization at every data point. 1099300100027 STATUS (APRVD) Approved by R.E.Howe, 1981/10/6. 1099300100028 HISTORY (19810913C) 1099300100029 (20180521U) BP: Updated to new date formats, lower 1099300100030 case, doi, experiment description. 1099300100031 Corrections according last EXFOR rules and 1099300100032 Dict. 1099300100033 ENDBIB 31 0 1099300100034 NOCOMMON 0 0 1099300100035 ENDSUBENT 34 0 1099300199999 SUBENT 10993002 20180521 14411099300200001 BIB 4 13 1099300200002 REACTION ((95-AM-242-M(N,F),,NU)/(92-U-235(N,F),,NU)) 1099300200003 CORRECTION Am data corrected for spontaneous fission due to 1099300200004 buildup of Cm-242 (assumed Cm-242 nu(bar)= 2.49). 1099300200005 Data corrected for deadtime, background, geometrical 1099300200006 effects (0.6 percent), changes in scintillator 1099300200007 efficiency due to spectral differences between the 1099300200008 spectrum of fission neutrons from U-235 and Am-242-m 1099300200009 (0.3 percent). 1099300200010 ERR-ANALYS (ERR-S) The standard deviations include statistical 1099300200011 errors in coincidence and background TOF spectra for 1099300200012 all fission chambers. No error is included for other 1099300200013 corrections to data. 1099300200014 STATUS (TABLE) Table I, page 461. 1099300200015 ENDBIB 13 0 1099300200016 NOCOMMON 0 0 1099300200017 DATA 4 30 1099300200018 EN EN-RSL DATA ERR-S 1099300200019 MEV MEV NO-DIM NO-DIM 1099300200020 0.037 0.022 1.354 0.060 1099300200021 0.107 0.048 1.338 0.048 1099300200022 0.200 0.047 1.317 0.046 1099300200023 0.329 0.086 1.310 0.033 1099300200024 0.476 0.068 1.349 0.037 1099300200025 0.620 0.085 1.347 0.036 1099300200026 0.82 0.13 1.374 0.035 1099300200027 1.05 0.12 1.402 0.044 1099300200028 1.30 0.16 1.326 0.041 1099300200029 1.57 0.15 1.404 0.051 1099300200030 1.86 0.20 1.383 0.051 1099300200031 2.13 0.14 1.499 0.079 1099300200032 2.42 0.23 1.267 0.061 1099300200033 2.84 0.29 1.364 0.071 1099300200034 3.39 0.38 1.359 0.076 1099300200035 4.10 0.51 1.384 0.077 1099300200036 4.86 0.48 1.144 0.082 1099300200037 5.65 0.60 1.404 0.090 1099300200038 6.66 0.77 1.342 0.079 1099300200039 7.97 0.99 1.123 0.068 1099300200040 9.14 0.79 1.28 0.11 1099300200041 10.13 0.92 1.16 0.11 1099300200042 11.3 1.1 0.94 0.11 1099300200043 12.6 1.3 1.20 0.15 1099300200044 14.3 1.5 1.12 0.15 1099300200045 16.2 1.9 1.15 0.18 1099300200046 18.7 2.3 1.17 0.22 1099300200047 21.6 2.9 1.07 0.23 1099300200048 25.4 3.6 0.83 0.21 1099300200049 30.3 4.7 1.02 0.29 1099300200050 ENDDATA 32 0 1099300200051 ENDSUBENT 50 0 1099300299999 ENDENTRY 2 0 1099399999999