ENTRY 41746 20221025 420941746 0 1 SUBENT 41746001 20221025 420941746 1 1 BIB 11 67 41746 1 2 TITLE Study of spontaneous fission using the SFiNx system 41746 1 3 AUTHOR (A.V.Isaev,A.V.Yeremin,N.I.Zamyatin,I.N.Izosimov, 41746 1 4 A.A.Kuznetsova,O.N.Malyshev,R.S.Mukhin,A.G.Popeko, 41746 1 5 Yu.A.Popov, B.Sailaubekov,A.I.Svirikhin, E.A.Sokol, 41746 1 6 M.S.Tezekbayeva,D.A.Testov,M.L.Chelnokova,V.I.Chepigin,41746 1 7 S.Antalic,P.Mosat,P.Brionnet,B.Gall,O.Dorvaux, 41746 1 8 K.Kessaci,A.Sellam,A.Lopez-Martens,K.Hauschild) 41746 1 9 REFERENCE (J,APP/BS,14,835,2021) Proceedings Supplement No 4. 41746 1 10 #doi:10.5506/APhysPolBSupp.14.835 41746 1 11 Presented at III International Scientific Forum 41746 1 12 'Nuclear Science and Technologies', Almaty, Kazakhstan,41746 1 13 September 20-24, 2021. 41746 1 14 (J,FCY/L,19,(1/240),26,2022) "Detector System SFiNx" 41746 1 15 Full text In Russian, Abstract in English. 41746 1 16 Data table. 41746 1 17 (J,PPN/L,19,37,2022) Engl.translation of FCY/L. 41746 1 18 INSTITUTE (4ZZZDUB) A.V.Isaev,A.V.Yeremin,N.I.Zamyatin, 41746 1 19 I.N.Izosimov,A.A.Kuznetsova,O.N.Malyshev,R.S.Mukhin, 41746 1 20 A.G.Popeko,Yu.A.Popov,B.Sailaubekov,A.I.Svirikhin, 41746 1 21 E.A.Sokol,M.S.Tezekbayeva,D.A.Testov,M.L.Chelnokova, 41746 1 22 V.I.Chepigin. 41746 1 23 (4RUSDBU) A.V.Yeremin,O.N.Malyshev,A.G.Popeko, 41746 1 24 Yu.A.Popov,A.I.Svirikhin. 41746 1 25 (4KASKAZ) B.Sailaubekov,M.S.Tezekbayeva. 41746 1 26 (3SLKUB) S.Antalic,P.Mosat. 41746 1 27 (2FR STR) P.Brionnet,B.Gall,O.Dorvaux,K.Kessaci, 41746 1 28 A.Sellam. 41746 1 29 (2FR PAR) A.Lopez-Martens,K.Hauschild. 41746 1 30 REL-REF (I,,A.G.Popeko+,J,NIM/B,376,140,2016) 41746 1 31 SHELS velocity filter details. 41746 1 32 FACILITY (CYCLO,4ZZZDUB) 41746 1 33 . SHELS separator. 41746 1 34 SAMPLE Produced in the reaction 41746 1 35 Ca-48(Pb-206,2N) -> No-252 on 41746 1 36 206PbS of 97 % enrichment in 206Pb, 350 microgram/cm2 41746 1 37 thickness. The beam energy 215+-2 MeV. 41746 1 38 After passing through the separator, the recoil nuclei 41746 1 39 were implanted into the focal plane large DSSSD. 41746 1 40 The cross sections of the 2n-evaporation channel 41746 1 41 (whereby the 252No isotope was produced) is estimated 41746 1 42 ~800 nb. 41746 1 43 DETECTOR (HE3SP) 116 He-3 proportional counters placed in a 41746 1 44 polyethylene moderator in the form of a regular 41746 1 45 octagonal prism (height 630 mm, circumscribed circle 41746 1 46 diameter 762 mm). See details in Table I of 41746 1 47 APP/BS,14,(4),835,2021. 41746 1 48 The single-neutron registration efficiency measured 41746 1 49 with 248Cm source is 54.7+-0.1% (nonlinear 41746 1 50 least-squares method error). The average neutron 41746 1 51 lifetime in the setup is 18.4+-0.2 microsec (exponent 41746 1 52 fitting error). 41746 1 53 (SISD) An array of DSSSD detectors inside the vacuum 41746 1 54 chamber is represented by a focal plane 128 x 128-strip41746 1 55 detector (100 x 100 mm2 area, 500 micron thickness) and41746 1 56 8 side 16 x 16-strip detectors (50 x 60 mm2 area, 41746 1 57 700 micron thickness). For registration of alpha-, 41746 1 58 beta-particles, and fission fragments. 41746 1 59 Energy resolutions were measured using 8 MeV 41746 1 60 alpha-particles as 20 keV and 30 keV for the focal and 41746 1 61 side silicon detectors, respectively. 41746 1 62 METHOD 3260 reliable events of 252No spontaneous fission were41746 1 63 found. 41746 1 64 COMMENT This work was supported by the Russian Foundation for 41746 1 65 Basic Research, project No.18-52-15004. 41746 1 66 HISTORY (20220211C) M.M. 41746 1 67 (20221025U) J,APP/B,14,(S4),835,2021 -> 41746 1 68 J,APP/BS,14,835,2021. 41746 1 69 ENDBIB 67 0 41746 1 70 NOCOMMON 0 0 41746 1 71 ENDSUBENT 70 0 41746 199999 SUBENT 41746002 20220211 420541746 2 1 BIB 6 20 41746 2 2 REACTION 1(102-NO-252(0,F),PR,NU) 41746 2 3 2(102-NO-252(0,F),PR,NU) 41746 2 4 ANALYSIS 1 Restored by using the Tikhonov statistical 41746 2 5 regularisation method. 41746 2 6 DECAY-DATA (102-NO-252-G,2.46SEC) 41746 2 7 HL=2.44+-0.04 sec measured (exponential fitting error).41746 2 8 REL-REF (A,41741004,A.V.Isaev+,J,PPN/L,18,449,2021) 41746 2 9 4.51+-0.25 prt/fis 41746 2 10 (A,41559002,Yu.A.Lazarev+,J,PL/B,52,321,1974) 41746 2 11 4.15+-0.30 prt/fis 41746 2 12 (A,41540002,A.V.Yeremin+,J,NIM/A,539,441,2005) 41746 2 13 4.43+-0.45 prt/fis 41746 2 14 ERR-ANALYS (DATA-ERR) Contains statistical uncertainty and 41746 2 15 the neutron detector efficiency uncertainty. 41746 2 16 STATUS (TABLE) Table 2 of FCY/L,19,(1/240),26,2022 41746 2 17 Text page 837 of J.Acta Physica Polonica, Part B, 41746 2 18 v.14, Suppl.4, p.835, 2021 41746 2 19 (DEP,41746003) Prompt neutron multiplicity distribution41746 2 20 (COREL,41741004) Measurement with an arrange of 41746 2 21 54 He3 counters 41746 2 22 ENDBIB 20 0 41746 2 23 COMMON 1 3 41746 2 24 ERR-HL 41746 2 25 SEC 41746 2 26 0.04 41746 2 27 ENDCOMMON 3 0 41746 2 28 DATA 4 1 41746 2 29 DATA 1DATA-ERR 1DATA 2DATA-ERR 2 41746 2 30 PRT/FIS PRT/FIS PRT/FIS PRT/FIS 41746 2 31 4.27 0.15 4.25 0.09 41746 2 32 ENDDATA 3 0 41746 2 33 ENDSUBENT 32 0 41746 299999 SUBENT 41746003 20220211 420541746 3 1 BIB 6 12 41746 3 2 REACTION 1(102-NO-252(0,F),PR/NUM,NU) Directly measured. 41746 3 3 2(102-NO-252(0,F),PR/NUM,NU) Restored. 41746 3 4 ANALYSIS 2 Restored by using the Tikhonov statistical 41746 3 5 regularisation method. 41746 3 6 DECAY-DATA (102-NO-252-G,2.46SEC) 41746 3 7 HL=2.44+-0.04 sec measured (exponential fitting error).41746 3 8 MISC-COL (MISC) Background 41746 3 9 ERR-ANALYS (DATA-ERR) Contains statistical uncertainty and 41746 3 10 the neutron detector efficiency uncertainty. 41746 3 11 STATUS (TABLE) Table 2 of FCY/L,19,(1/240),26,2022 41746 3 12 Data are on Fig.2 of J.Acta Physica Polonica, Part B, 41746 3 13 v.14, Suppl.4, p.835, 2021 41746 3 14 ENDBIB 12 0 41746 3 15 COMMON 1 3 41746 3 16 ERR-HL 41746 3 17 SEC 41746 3 18 0.04 41746 3 19 ENDCOMMON 3 0 41746 3 20 DATA 7 10 41746 3 21 PART-OUT DATA 1DATA-ERR 1DATA 2DATA-ERR 2MISC 41746 3 22 MISC-ERR 41746 3 23 NO-DIM NO-DIM NO-DIM NO-DIM NO-DIM NO-DIM 41746 3 24 NO-DIM 41746 3 25 0. 0.069 0.005 0.010 0.008 0.994 41746 3 26 0.016 41746 3 27 1. 0.206 0.008 0.012 0.018 0.006 41746 3 28 0.001 41746 3 29 2. 0.303 0.007 0.081 0.023 3. E-0441746 3 30 1. E-04 41746 3 31 3. 0.245 0.005 0.201 0.024 0. 41746 3 32 0.001 41746 3 33 4. 0.125 0.003 0.276 0.025 41746 3 34 41746 3 35 5. 0.041 0.002 0.225 0.024 41746 3 36 41746 3 37 6. 0.010 0.001 0.122 0.026 41746 3 38 41746 3 39 7. 0.001 0.001 0.055 0.020 41746 3 40 41746 3 41 8. 0. 0.001 0.018 0.021 41746 3 42 41746 3 43 9. 0. 0. 0.010 41746 3 44 41746 3 45 ENDDATA 24 0 41746 3 46 ENDSUBENT 45 0 41746 399999 ENDENTRY 3 0 4174699999999