ENTRY 41778 20250225 4177800000001 SUBENT 41778001 20250225 20250711 4177800100001 BIB 10 44 4177800100002 TITLE Prompt neutron multiplicity from spontaneous fission 4177800100003 of 244Fm 4177800100004 AUTHOR (R.S.Mukhin, A.V.Isaev, I.I.Ulanova, A.I.Svirikhin, 4177800100005 M.A.Bychkov, M.L.Chelnokov, V.I Chepigin, H.M Devaraja,4177800100006 O.Dorvaux, B.Gall, K.Hauschild, I.N.Izosimov, 4177800100007 A.A.Kuznetsova,A.Lopez-Martens,O.N.Malyshev,A.G.Popeko,4177800100008 Yu.A.Popov, B.Sailaubekov, E.A.Sokol, M.S.Tezekbayeva, 4177800100009 N.I.Zamyatin, A.V.Yeremin) 4177800100010 INSTITUTE (4ZZZDUB) R.S.Mukhin,A.V.Isaev,A.I.Svirikhin, 4177800100011 M.A.Bychkov,M.L.Chelnokov, V.I Chepigin, H.M Devaraja, 4177800100012 I.N.Izosimov,A.A.Kuznetsova,O.N.Malyshev,A.G.Popeko, 4177800100013 Yu.A.Popov, B.Sailaubekov, E.A.Sokol, M.S.Tezekbayeva 4177800100014 N.I.Zamyatin, A.V.Yeremin 4177800100015 (4RUSDBU) A.V.Isaev,I.I.Ulanova,A.I.Svirikhin 4177800100016 O.N.Malyshev,A.G.Popeko,Yu.A.Popov,A.V.Yeremin 4177800100017 (2FR ULP) O.Dorvaux, B.Gall 4177800100018 (2FR PAR) K.Hauschild,A.Lopez-Martens 4177800100019 (4KASKAZ) B.Sailaubekov,M.S.Tezekbayeva 4177800100020 (4KASATN) B.Sailaubekov 4177800100021 REFERENCE (J,EPJ/A,60,223,2024) 4177800100022 #doi:10.1140/epja/s10050-024-01441-0 4177800100023 SAMPLE Produced in the complete fusion reaction 4177800100024 Pb-206(Ar-40,2N) -> Fm-244. 4177800100025 FACILITY (CYCLO,4ZZZDUB) U400 cyclotron of the Flerov Laboratory4177800100026 of Nuclear Reactions. Ar-40 beam at energy 191+-2 MeV 4177800100027 strike PbS microg/cm2 thickness target on 1.5 micron 4177800100028 thick Ti backing. 4177800100029 DETECTOR (HE3SP) Assembly of double-sided silicon strip 4177800100030 detectors DSSD ( for fission fragments detection) 4177800100031 surrounded by an array of 116 neutron counters filled 4177800100032 with 3He. 4177800100033 The energy calibration of the DSSD in the 4177800100034 alpha-particle energy region was done using 4177800100035 174Yb(40Ar,xn)(214-x)Ra reaction. 4177800100036 The efficiency calibration of the array of neutron 4177800100037 counters was done using a 248Cm source placed close to 4177800100038 the surface of the implantation DSSD. The single 4177800100039 neutron detection efficiency was estimated to be 4177800100040 (54 +- 1)%. 4177800100041 CORRECTION For background. 4177800100042 For detection efficiency. 4177800100043 COMMENT Partial financial support was received from the Joint 4177800100044 Institute For Nuclear Research (grant number 24-501-03)4177800100045 HISTORY (20250225C) M.M. 4177800100046 ENDBIB 44 0 4177800100047 NOCOMMON 0 0 4177800100048 ENDSUBENT 47 0 4177800199999 SUBENT 41778002 20250225 20250711 4177800200001 BIB 6 9 4177800200002 REACTION (100-FM-244(0,F),PR,NU) 4177800200003 METHOD 503 events of spontaneous fission was detected 4177800200004 DECAY-DATA (100-FM-244,3.8E-3SEC) 3.8 +- 0.3 ms measured. 4177800200005 ERR-ANALYS (DATA-ERR) Type of uncertainty is not explained in the 4177800200006 article. 4177800200007 REL-REF (A,41579005,A.I.Svirikhin+,J,EPJ/A,48,121,2012) 4177800200008 STATUS (TABLE,,R.S.Mukhin,J,EPJ/A,60,223,2024) 4177800200009 Text of Abstract. Text on pages 3, 5. 4177800200010 (DEP,41778003) Neutron distribution. 4177800200011 ENDBIB 9 0 4177800200012 NOCOMMON 0 0 4177800200013 DATA 2 1 4177800200014 DATA DATA-ERR 4177800200015 PRT/FIS PRT/FIS 4177800200016 3.6 0.1 4177800200017 ENDDATA 3 0 4177800200018 ENDSUBENT 17 0 4177800299999 SUBENT 41778003 20250225 20250711 4177800300001 BIB 6 11 4177800300002 REACTION (100-FM-244(0,F),PR/NUM,NU) 4177800300003 MISC-COL (MISC) Number of counts detected. 4177800300004 ANALYSIS The shape of the multiplicity distribution of prompt 4177800300005 fission neutrons was restored using the Tikhonov 4177800300006 regularization technique. 4177800300007 ERR-ANALYS (DATA-ERR) Type of uncertainty is not explained in the 4177800300008 article. 4177800300009 REL-REF (D,41579005,A.I.Svirikhin+,J,EPJ/A,48,121,2012) 4177800300010 The peak positions of the previous and present 4177800300011 results do not match. Wide and slightly asymmetric. 4177800300012 STATUS (TABLE,,R.S.Mukhin,J,EPJ/A,60,223,2024) Table 1. 4177800300013 ENDBIB 11 0 4177800300014 NOCOMMON 0 0 4177800300015 DATA 4 10 4177800300016 PART-OUT DATA DATA-ERR MISC 4177800300017 NO-DIM NO-DIM NO-DIM NO-DIM 4177800300018 0. 0.024 0.016 23. 4177800300019 1. 0.013 0.019 57. 4177800300020 2. 0.123 0.032 77. 4177800300021 3. 0.297 0.038 51. 4177800300022 4. 0.297 0.033 16. 4177800300023 5. 0.173 0.034 0. 4177800300024 6. 0.057 0.024 0. 4177800300025 7. 0.010 0.013 0. 4177800300026 8. 0.001 0.004 0. 4177800300027 9. 0.005 0.007 0. 4177800300028 ENDDATA 12 0 4177800300029 ENDSUBENT 28 0 4177800399999 ENDENTRY 3 0 4177899999999