ENTRY 41778 20250225 422241778000 1 SUBENT 41778001 20250225 422241778001 1 BIB 10 44 41778001 2 TITLE Prompt neutron multiplicity from spontaneous fission 41778001 3 of 244Fm 41778001 4 AUTHOR (R.S.Mukhin, A.V.Isaev, I.I.Ulanova, A.I.Svirikhin, 41778001 5 M.A.Bychkov, M.L.Chelnokov, V.I Chepigin, H.M Devaraja,41778001 6 O.Dorvaux, B.Gall, K.Hauschild, I.N.Izosimov, 41778001 7 A.A.Kuznetsova,A.Lopez-Martens,O.N.Malyshev,A.G.Popeko,41778001 8 Yu.A.Popov, B.Sailaubekov, E.A.Sokol, M.S.Tezekbayeva, 41778001 9 N.I.Zamyatin, A.V.Yeremin) 41778001 10 INSTITUTE (4ZZZDUB) R.S.Mukhin,A.V.Isaev,A.I.Svirikhin, 41778001 11 M.A.Bychkov,M.L.Chelnokov, V.I Chepigin, H.M Devaraja, 41778001 12 I.N.Izosimov,A.A.Kuznetsova,O.N.Malyshev,A.G.Popeko, 41778001 13 Yu.A.Popov, B.Sailaubekov, E.A.Sokol, M.S.Tezekbayeva 41778001 14 N.I.Zamyatin, A.V.Yeremin 41778001 15 (4RUSDBU) A.V.Isaev,I.I.Ulanova,A.I.Svirikhin 41778001 16 O.N.Malyshev,A.G.Popeko,Yu.A.Popov,A.V.Yeremin 41778001 17 (2FR ULP) O.Dorvaux, B.Gall 41778001 18 (2FR PAR) K.Hauschild,A.Lopez-Martens 41778001 19 (4KASKAZ) B.Sailaubekov,M.S.Tezekbayeva 41778001 20 (4KASATN) B.Sailaubekov 41778001 21 REFERENCE (J,EPJ/A,60,223,2024) 41778001 22 #doi:10.1140/epja/s10050-024-01441-0 41778001 23 SAMPLE Produced in the complete fusion reaction 41778001 24 Pb-206(Ar-40,2N) -> Fm-244. 41778001 25 FACILITY (CYCLO,4ZZZDUB) U400 cyclotron of the Flerov Laboratory41778001 26 of Nuclear Reactions. Ar-40 beam at energy 191+-2 MeV 41778001 27 strike PbS microg/cm2 thickness target on 1.5 micron 41778001 28 thick Ti backing. 41778001 29 DETECTOR (HE3SP) Assembly of double-sided silicon strip 41778001 30 detectors DSSD ( for fission fragments detection) 41778001 31 surrounded by an array of 116 neutron counters filled 41778001 32 with 3He. 41778001 33 The energy calibration of the DSSD in the 41778001 34 alpha-particle energy region was done using 41778001 35 174Yb(40Ar,xn)(214-x)Ra reaction. 41778001 36 The efficiency calibration of the array of neutron 41778001 37 counters was done using a 248Cm source placed close to 41778001 38 the surface of the implantation DSSD. The single 41778001 39 neutron detection efficiency was estimated to be 41778001 40 (54 +- 1)%. 41778001 41 CORRECTION For background. 41778001 42 For detection efficiency. 41778001 43 COMMENT Partial financial support was received from the Joint 41778001 44 Institute For Nuclear Research (grant number 24-501-03)41778001 45 HISTORY (20250225C) M.M. 41778001 46 ENDBIB 44 0 41778001 47 NOCOMMON 0 0 41778001 48 ENDSUBENT 47 0 4177800199999 SUBENT 41778002 20250225 422241778002 1 BIB 6 9 41778002 2 REACTION (100-FM-244(0,F),PR,NU) 41778002 3 METHOD 503 events of spontaneous fission was detected 41778002 4 DECAY-DATA (100-FM-244,3.8E-3SEC) 3.8 +- 0.3 ms measured. 41778002 5 ERR-ANALYS (DATA-ERR) Type of uncertainty is not explained in the 41778002 6 article. 41778002 7 REL-REF (A,41579005,A.I.Svirikhin+,J,EPJ/A,48,121,2012) 41778002 8 STATUS (TABLE,,R.S.Mukhin,J,EPJ/A,60,223,2024) 41778002 9 Text of Abstract. Text on pages 3, 5. 41778002 10 (DEP,41778003) Neutron distribution. 41778002 11 ENDBIB 9 0 41778002 12 NOCOMMON 0 0 41778002 13 DATA 2 1 41778002 14 DATA DATA-ERR 41778002 15 PRT/FIS PRT/FIS 41778002 16 3.6 0.1 41778002 17 ENDDATA 3 0 41778002 18 ENDSUBENT 17 0 4177800299999 SUBENT 41778003 20250225 422241778003 1 BIB 6 11 41778003 2 REACTION (100-FM-244(0,F),PR/NUM,NU) 41778003 3 MISC-COL (MISC) Number of counts detected. 41778003 4 ANALYSIS The shape of the multiplicity distribution of prompt 41778003 5 fission neutrons was restored using the Tikhonov 41778003 6 regularization technique. 41778003 7 ERR-ANALYS (DATA-ERR) Type of uncertainty is not explained in the 41778003 8 article. 41778003 9 REL-REF (D,41579005,A.I.Svirikhin+,J,EPJ/A,48,121,2012) 41778003 10 The peak positions of the previous and present 41778003 11 results do not match. Wide and slightly asymmetric. 41778003 12 STATUS (TABLE,,R.S.Mukhin,J,EPJ/A,60,223,2024) Table 1. 41778003 13 ENDBIB 11 0 41778003 14 NOCOMMON 0 0 41778003 15 DATA 4 10 41778003 16 PART-OUT DATA DATA-ERR MISC 41778003 17 NO-DIM NO-DIM NO-DIM NO-DIM 41778003 18 0. 0.024 0.016 23. 41778003 19 1. 0.013 0.019 57. 41778003 20 2. 0.123 0.032 77. 41778003 21 3. 0.297 0.038 51. 41778003 22 4. 0.297 0.033 16. 41778003 23 5. 0.173 0.034 0. 41778003 24 6. 0.057 0.024 0. 41778003 25 7. 0.010 0.013 0. 41778003 26 8. 0.001 0.004 0. 41778003 27 9. 0.005 0.007 0. 41778003 28 ENDDATA 12 0 41778003 29 ENDSUBENT 28 0 4177800399999 ENDENTRY 3 0 4177899999999