ENTRY 41590 20131129 41624159000000001 SUBENT 41590001 20131129 41624159000100001 BIB 13 50 4159000100002 TITLE The absolute total delayed neutron yields, relative 4159000100003 abundances and half-lives of delayed neutron groups 4159000100004 from neutron induced fission of 232Th, 233U, 236U, 4159000100005 239Pu and 241Am 4159000100006 REFERENCE (R,INDC(NDS)-0646,2013) In English. 4159000100007 AUTHOR (V.M.Piksaykin, A.S.Egorov, K.V.Mitrofanov) 4159000100008 INSTITUTE (4RUSFEI) 4159000100009 FACILITY (VDG,4RUSFEI) Cascade Generator CG-2.5. 4159000100010 Pneumatic transfer system. The times of sample 4159000100011 transportation from the irradiation position to the 4159000100012 neutron detector were from 150 to 200 ms depending on 4159000100013 gas pressure and the weight of the samples. 4159000100014 INC-SOURCE (P-T) T(p,n)He-3 4159000100015 (D-D) D(d,n)He-3 4159000100016 INC-SPECT Mono-energetic neutrons. 4159000100017 METHOD (ACTIV) Periodic irradiations of the samples in a 4159000100018 well-defined neutron flux followed by the measurement 4159000100019 of the time dependence of delayed neutron activity. 4159000100020 Two different types of experiments: 4159000100021 - measurements of the delayed neutron abundances and 4159000100022 periods, 4159000100023 - measurements of the total delayed neutron yields. 4159000100024 The irradiation time intervals were 15, 180 and 300 s. 4159000100025 Depending on background conditions the delayed neutron 4159000100026 counting intervals were 424.5 and 724.5 s with the time4159000100027 channel sequence after the end of sample irradiation: 4159000100028 0.01 s (150 channels), 0.02 s (150 channels), 0.1 s 4159000100029 (200 channels), 1 s (200 channels) and 10 s (30 or 4159000100030 50 channels). 4159000100031 DETECTOR (D4PI) For delayed neutron registration, thirty SNM-11 4159000100032 boron counters assembly in polyethylene cylinder of 4159000100033 400 mm diameter and 300 mm length.Counters were placed4159000100034 at three circles of 106, 160, 110 mm diameters. 4159000100035 In the center - hole of 36mm diameter to sample flight4159000100036 tube. Boron carbide powder, borated polyethylene, 4159000100037 cadmium sheets - for detector protection. 4159000100038 The neutron detector dead time measured with a 252Cf 4159000100039 spontaneous fission neutron source is 2.3+-0.2 micros. 4159000100040 Stability of neutron detector parameters and 4159000100041 appropriate electronic modules was controlled with the 4159000100042 help of isotopic neutron sources - Am(Li) and Pu(Li). 4159000100043 Neutron detector placed at 3 m aside from accelerator 4159000100044 target. 4159000100045 SAMPLE No information. 4159000100046 CORRECTION For backgrounds: 4159000100047 Counting interval, s 229.5 224.5 100 4159000100048 Relative background, % 95.2 95.1 41.5 4159000100049 Intensity of background,n/s 129.9 4159000100050 ERR-ANALYS (DATA-ERR) Not specified. 4159000100051 HISTORY (20131129C) M.M. 4159000100052 ENDBIB 50 0 4159000100053 NOCOMMON 0 0 4159000100054 ENDSUBENT 53 0 4159000199999 SUBENT 41590002 20131129 41624159000200001 BIB 2 3 4159000200002 REACTION (95-AM-241(N,F),DL,NU) Energy dependence of 4159000200003 absolute total yield of delayed neutrons 4159000200004 STATUS (TABLE) Table on page 29 of INDC(NDS)-0646. 4159000200005 ENDBIB 3 0 4159000200006 NOCOMMON 0 0 4159000200007 DATA 3 5 4159000200008 EN DATA DATA-ERR 4159000200009 MEV PC/FIS PC/FIS 4159000200010 0.86 0.330 0.050 4159000200011 0.96 0.360 0.054 4159000200012 1.01 0.460 0.069 4159000200013 3.85 0.490 0.074 4159000200014 4.85 0.540 0.082 4159000200015 ENDDATA 7 0 4159000200016 ENDSUBENT 15 0 4159000299999 SUBENT 41590003 20131129 41624159000300001 BIB 3 14 4159000300002 REACTION ((95-AM-241(N,F),DL/GRP,NU)/(95-AM-241(N,F),DL,NU)) 4159000300003 Relative abundances of delayed neutrons in 6-groups 4159000300004 model presentation. 4159000300005 ADD-RES Average half-life of delayed neutron precursors: 4159000300006 EN, MeV HL, sec 4159000300007 0.62 +- 0.06 10.2 +- 0.6 4159000300008 0.86 +- 0.06 10.4 +- 0.1 4159000300009 0.96 +- 0.06 11.1 +- 0.2 4159000300010 1.06 +- 0.0 10.9 +- 0.2 4159000300011 3.27 +- 0.14 10.8 +- 0.2 4159000300012 3.81 +- 0.11 9.7 +- 0.1 4159000300013 4.27 +- 0.11 10.2 +- 0.2 4159000300014 4.97 +- 0.13 9.7 +- 0.5 4159000300015 STATUS (TABLE) Table on page 22 of INDC(NDS)-0646. 4159000300016 ENDBIB 14 0 4159000300017 NOCOMMON 0 0 4159000300018 DATA 6 48 4159000300019 EN EN-ERR HL HL-ERR DATA DATA-ERR 4159000300020 MEV MEV SEC SEC NO-DIM NO-DIM 4159000300021 0.62 0.06 54.3 1.6 0.0434 0.001 4159000300022 0.62 0.06 21.94 0.66 0.264 0.008 4159000300023 0.62 0.06 6.08 0.18 0.201 0.006 4159000300024 0.62 0.06 2.24 0.07 0.317 0.009 4159000300025 0.62 0.06 0.496 0.015 0.152 0.005 4159000300026 0.62 0.06 0.179 0.005 0.0229 0.0007 4159000300027 0.86 0.06 53.97 0.61 0.0432 0.0005 4159000300028 0.86 0.06 22.61 0.25 0.271 0.003 4159000300029 0.86 0.06 6.08 0.07 0.199 0.002 4159000300030 0.86 0.06 2.24 0.03 0.314 0.004 4159000300031 0.86 0.06 0.498 0.006 0.151 0.002 4159000300032 0.86 0.06 0.179 0.002 0.0228 0.0003 4159000300033 0.96 0.06 53.99 0.93 0.0436 0.0007 4159000300034 0.96 0.06 23.51 0.39 0.284 0.005 4159000300035 0.96 0.06 6.27 0.11 0.199 0.003 4159000300036 0.96 0.06 2.279 0.039 0.302 0.005 4159000300037 0.96 0.06 0.494 0.009 0.148 0.003 4159000300038 0.96 0.06 0.179 0.003 0.0229 0.0004 4159000300039 1.06 0.06 54.0 1.1 0.0436 0.0009 4159000300040 1.06 0.06 23.92 0.45 0.276 0.006 4159000300041 1.06 0.06 6.13 0.12 0.202 0.004 4159000300042 1.06 0.06 2.31 0.05 0.308 0.006 4159000300043 1.06 0.06 0.49 0.01 0.148 0.003 4159000300044 1.06 0.06 0.179 0.004 0.0228 0.0005 4159000300045 3.27 0.14 54.5 1.1 0.0434 0.0009 4159000300046 3.27 0.14 23.47 0.49 0.272 0.006 4159000300047 3.27 0.14 6.10 0.13 0.199 0.004 4159000300048 3.27 0.14 2.26 0.05 0.312 0.007 4159000300049 3.27 0.14 0.496 0.011 0.150 0.003 4159000300050 3.27 0.14 0.179 0.004 0.0229 0.0005 4159000300051 3.81 0.11 54.47 0.93 0.0433 0.0007 4159000300052 3.81 0.11 21.28 0.31 0.251 0.004 4159000300053 3.81 0.11 5.85 0.09 0.201 0.003 4159000300054 3.81 0.11 2.23 0.04 0.329 0.005 4159000300055 3.81 0.11 0.503 0.009 0.153 0.003 4159000300056 3.81 0.11 0.179 0.003 0.0228 0.0004 4159000300057 4.27 0.11 54.4 1.2 0.0433 0.0009 4159000300058 4.27 0.11 21.75 0.41 0.266 0.006 4159000300059 4.27 0.11 5.99 0.12 0.202 0.004 4159000300060 4.27 0.11 2.30 0.05 0.317 0.006 4159000300061 4.27 0.11 0.49 0.01 0.149 0.003 4159000300062 4.27 0.11 0.179 0.004 0.0228 0.0005 4159000300063 4.97 0.13 56.5 1.7 0.043 0.001 4159000300064 4.97 0.13 22.19 0.39 0.237 0.007 4159000300065 4.97 0.13 5.69 0.15 0.202 0.006 4159000300066 4.97 0.13 2.18 0.05 0.336 0.008 4159000300067 4.97 0.13 0.502 0.015 0.159 0.005 4159000300068 4.97 0.13 0.180 0.005 0.0229 0.0007 4159000300069 ENDDATA 50 0 4159000300070 ENDSUBENT 69 0 4159000399999 ENDENTRY 3 0 4159099999999