ENTRY 41748 20220406 42074174800000001 SUBENT 41748001 20220406 42074174800100001 BIB 13 30 4174800100002 TITLE Measurements of the temporal characteristics of delayed4174800100003 neutron from neutron induced fission of 241Am in the 4174800100004 energy range from 14.2 to 18 MeV 4174800100005 AUTHOR (D.E.Gremyachkin, V.M.Piksaikin, A.S.Egorov, 4174800100006 K.V.Mitrofanov) 4174800100007 REFERENCE ((S,ISINN-25,363,2018)= 4174800100008 (R,JINR-E3-2018-12,363,2018)) In English. 4174800100009 INSTITUTE (4RUSFEI) 4174800100010 FACILITY (VDG,4RUSFEI) Cascade generator KG-2.5. 4174800100011 Pneumatic transport system for sample moving, 4174800100012 transportation time ~100-150 msec. 4174800100013 INC-SOURCE (D-T) Solid tritium target. 4174800100014 METHOD (ACTIV) Cyclic irradiations of the samples in a 4174800100015 well-defined neutron flux followed by the measurement 4174800100016 of the time dependence of delayed neutron activity. 4174800100017 DETECTOR (D4PI) For delayed neutron registration, thirty SNM-11 4174800100018 boron counters assembly placed in polyethylene 4174800100019 moderator ( 400 mm outer diameter, 300 mm length) 4174800100020 as three circles of 53, 80,110 mm radius. 4174800100021 Detector was shielded with boron carbide, cadmium and 4174800100022 borated polyethylene. 4174800100023 SAMPLE No information. 4174800100024 CORRECTION For blocking effect and concomitant source. 4174800100025 ANALYSIS Time dependence of induced neutron activity was fitted4174800100026 by iterative least squares method using 6-group model 4174800100027 parameters of delayed neutron abundances and half-lives4174800100028 of their precursors. 4174800100029 ERR-ANALYS (DATA-ERR) Type of uncertainty is not explained in the 4174800100030 article. 4174800100031 HISTORY (20220406C) M.M. 4174800100032 ENDBIB 30 0 4174800100033 NOCOMMON 0 0 4174800100034 ENDSUBENT 33 0 4174800199999 SUBENT 41748002 20220406 42074174800200001 BIB 4 41 4174800200002 REACTION ((95-AM-241(N,F),DL/GRP,NU)/(95-AM-241(N,F),DL,NU)) 4174800200003 Relative abundances of delayed neutrons in 6-groups 4174800200004 model presentation. 4174800200005 COVARIANCE Correlation matrix for EN=17.98 MeV : 4174800200006 ai - relative yield, 4174800200007 Ti - HL of delayed neutrons. 4174800200008 (XY,12,N,Correlated Parameters) 4174800200009 N Parameter 4174800200010 1 a1 4174800200011 2 T1 4174800200012 3 a2 4174800200013 4 T2 4174800200014 5 a3 4174800200015 6 T3 4174800200016 7 a4 4174800200017 8 T4 4174800200018 9 a5 4174800200019 10 T5 4174800200020 11 a6 4174800200021 12 T6 4174800200022 (Z,78,NO-DIM,COR) 4174800200023 1. 4174800200024 -0.32 1. 4174800200025 0. 0. 1. 4174800200026 0.06 -.11 0. 1. 4174800200027 -0.2 -.06 0. 0.01 1. 4174800200028 -0.03 -.26 0. 0. -.11 1. 4174800200029 0. .09 0. -.01 .06 0.11 1. 4174800200030 -0.35 .05 0. 0.02 -.08 -.01 0.02 1. 4174800200031 0.09 .05 0. 0. 0.05 0.07 -.03 0.05 1. 4174800200032 -0.19 .04 0. 0. -.01 0.01 0. -.09 .01 1. 4174800200033 0.1 0. 0. 0. 0.01 0.01 0. 0.02 0. .01 1. 4174800200034 -0.03 0. 0. 0. 0. 0. 0. 0.01 0. 0. 0. 1. 4174800200035 ADD-RES Average half-life of delayed neutron precursors: 4174800200036 EN, MeV HL, sec 4174800200037 14.23+-0.20 9.20+-0.14 4174800200038 15.84+-0.20 10.81+-0.08 4174800200039 16.20+-0.20 11.47+-0.19 4174800200040 16.70+-0.20 11.19+-0.20 4174800200041 17.79+-0.20 10.74+-0.16 4174800200042 STATUS (TABLE) Table 1 of ISINN-25,p.363,2016 4174800200043 ENDBIB 41 0 4174800200044 COMMON 1 3 4174800200045 EN-ERR 4174800200046 MEV 4174800200047 0.20 4174800200048 ENDCOMMON 3 0 4174800200049 DATA 5 30 4174800200050 EN HL HL-ERR DATA DATA-ERR 4174800200051 MEV SEC SEC NO-DIM NO-DIM 4174800200052 14.23 56.0 1.2 0.382 0.0008 4174800200053 14.23 12.1 0.2 0.224 0.005 4174800200054 14.23 7.47 0.14 0.461 0.010 4174800200055 14.23 4.46 0.09 0.195 0.004 4174800200056 14.23 0.44 0.01 0.063 0.001 4174800200057 14.23 0.174 0.004 0.019 0.004 4174800200058 15.84 55.1 0.5 0.0420 0.0003 4174800200059 15.84 24.1 0.2 0.229 0.002 4174800200060 15.84 5.26 0.04 0.427 0.003 4174800200061 15.84 3.23 0.03 0.215 0.002 4174800200062 15.84 0.49 0.004 0.067 0.001 4174800200063 15.84 0.175 0.002 0.019 0.002 4174800200064 16.20 55.6 1.2 0.0399 0.0008 4174800200065 16.20 24.4 0.4 0.258 0.005 4174800200066 16.20 5.76 0.11 0.388 0.008 4174800200067 16.20 3.12 0.07 0.221 0.005 4174800200068 16.20 0.47 0.01 0.073 0.002 4174800200069 16.20 0.177 0.004 0.020 0.004 4174800200070 16.70 54.7 1.2 0.0394 0.0008 4174800200071 16.70 23.2 0.5 0.274 0.002 4174800200072 16.70 5.50 0.11 0.367 0.008 4174800200073 16.70 2.77 0.06 0.226 0.005 4174800200074 16.70 0.48 0.01 0.075 0.002 4174800200075 16.70 0.178 0.004 0.020 0.004 4174800200076 17.79 54.4 0.9 0.0399 0.0007 4174800200077 17.79 23.5 0.4 0.257 0.004 4174800200078 17.79 4.99 0.08 0.372 0.006 4174800200079 17.79 2.69 0.05 0.234 0.004 4174800200080 17.79 0.49 0.008 0.077 0.001 4174800200081 17.79 0.178 0.003 0.020 0.003 4174800200082 ENDDATA 32 0 4174800200083 ENDSUBENT 82 0 4174800299999 ENDENTRY 2 0 4174899999999