ENTRY 32253 20241119 3225300000001 SUBENT 32253001 20241119 20250110 3225300100001 BIB 12 39 3225300100002 TITLE Formation of bound dineutrons in the 175Lu(n,2n) 3225300100003 174gLu nuclear reaction and its cross-section 3225300100004 AUTHOR (Ihor Kadenko,Barna Biro,Mihaly Braun,Andras Fenyvesi, 3225300100005 Kateryna Okopna,Nadiia Sakhno,Lorand Zakany) 3225300100006 INSTITUTE (4UKRKGU,3HUNDEB) 3225300100007 REFERENCE (J,PL/B,859,139100,2024) 3225300100008 #doi:10.1016/j.physletb.2024.139100 3225300100009 FACILITY (CYCLO,3HUNDEB) The MGC-20E cyclotron. 3225300100010 INC-SOURCE (D-D) The energy of the deuterons was 3225300100011 Ed = 4.354 MeV +/- 0.4%. 3225300100012 DETECTOR (HPGE) A IRION CANBERRA GX2018 type vertical XtRa HPGe 3225300100013 detector equipped with a Model iPA-SL preamplifier with3225300100014 negative output polarity. The energy resolutions of the3225300100015 detector are FWHM = 0.850 keV at Eg = 122 keV and 3225300100016 FWHM = 1.8 keV at Eg = 1.33 MeV gamma energies. 3225300100017 The instrumental gamma spectra measured for calibrated 3225300100018 22Na, 57Co, 60Co, 137Cs, and 241Am radioisotope sources3225300100019 were used for the energy and FWHM calibrations of the 3225300100020 spectrometer. 3225300100021 SAMPLE (71-LU-175,NAT=0.9741) 3225300100022 The Lu sample consisted of two disks made of the same 3225300100023 naturally isotopic Lu material. Both disks had a 3225300100024 diameter of 20 mm and a thickness of 1.2 mm. The 3225300100025 masses of the disks are 6.387 g and 6.295 g. 3225300100026 The elemental composition of the two samples are as 3225300100027 follows: natLu - 96.45 w %; Hf - 0.05 w %; Th, 3225300100028 Pm, Gd, Tb, Dy, and Yb are present, but no quantitative3225300100029 analysis was done. 3225300100030 METHOD (ACTIV) 3225300100031 STATUS (APRVD) Approved by I.Kadenko, 19 November 2024. 3225300100032 ERR-ANALYS (ERR-T) The main contributors for the total uncertainty3225300100033 were as follows. 3225300100034 (ERR-1) Nuclear decay constant of 174Lu. 3225300100035 (ERR-2) Efficiency of detection. 3225300100036 (ERR-3) Gamma-quantum intensity due to the decay of 3225300100037 174Lu nuclei. 3225300100038 (ERR-4) Flux density of fast neutrons. 3225300100039 (ERR-S,2.6,4.2) Counting statistics. 3225300100040 HISTORY (20241110C) UkrNDC 3225300100041 ENDBIB 39 0 3225300100042 COMMON 6 3 3225300100043 EN-MIN EN-MAX ERR-1 ERR-2 ERR-3 ERR-4 3225300100044 MEV MEV PER-CENT PER-CENT PER-CENT PER-CENT 3225300100045 5.51 6.00 1.4 4. 2.5 17. 3225300100046 ENDCOMMON 3 0 3225300100047 ENDSUBENT 46 0 3225300199999 SUBENT 32253002 20241119 20250110 3225300200001 BIB 4 7 3225300200002 REACTION (71-LU-175(N,X)71-LU-174,,SIG,,SPA) 3225300200003 X = a bound dineutron 3225300200004 DECAY-DATA (71-LU-174-G,3.31YR,DG,1241.8,0.0514) 3225300200005 FLAG (1.) From spectrum 1 3225300200006 (2.) From spectrum 2 3225300200007 STATUS (TABLE,,I.Kadenko+,J,PL/B,859,139100,2024) Text on p.4.3225300200008 (SUPPL,32253004) Calculated neutron spectrum 3225300200009 ENDBIB 7 0 3225300200010 NOCOMMON 0 0 3225300200011 DATA 3 2 3225300200012 DATA ERR-T FLAG 3225300200013 MB MB NO-DIM 3225300200014 32.6 5.8 1. 3225300200015 34.4 6.1 2. 3225300200016 ENDDATA 4 0 3225300200017 ENDSUBENT 16 0 3225300299999 SUBENT 32253003 20241119 20250110 3225300300001 BIB 4 7 3225300300002 REACTION (71-LU-175(N,X)71-LU-174,,SIG,,SPA/AV) 3225300300003 X = a bound dineutron 3225300300004 DECAY-DATA (71-LU-174-G,3.31YR,DG,1241.8,0.0514) 3225300300005 ANALYSIS The averaged value from two counting of Lu samples 3225300300006 STATUS (TABLE,,I.Kadenko+,J,PL/B,859,139100,2024) Text on p.4.3225300300007 (DEP,32253002) Cross sections for spectrum 1 and 2 3225300300008 (SUPPL,32253004) Calculated neutron spectrum 3225300300009 ENDBIB 7 0 3225300300010 NOCOMMON 0 0 3225300300011 DATA 3 1 3225300300012 DATA +ERR-T -ERR-T 3225300300013 MB MB MB 3225300300014 33.5 7.0 6.7 3225300300015 ENDDATA 3 0 3225300300016 ENDSUBENT 15 0 3225300399999 SUBENT 32253004 20241119 20250110 3225300400001 BIB 3 59 3225300400002 SUPPL-INF (INCSP) Neutron Lu-irradiation spectrum based on 3225300400003 calculation with the NeuSDesc code 3225300400004 Col. 1: En-group-low (MeV) 3225300400005 Col. 2: En-group-high (MeV) 3225300400006 Col. 3: Volume averaged energy group fluence after 3225300400007 irradiation at Ideuteron = 1.83 microAmper 3225300400008 and lasted for t-irradiation = 56 640 s (n/cm2) 3225300400009 ------------------------------ 3225300400010 5.51 5.52 3.78E+09 3225300400011 5.52 5.53 3.88E+09 3225300400012 5.53 5.54 4.05E+09 3225300400013 5.54 5.55 4.21E+09 3225300400014 5.55 5.56 4.36E+09 3225300400015 5.56 5.57 4.54E+09 3225300400016 5.57 5.58 4.71E+09 3225300400017 5.58 5.59 4.88E+09 3225300400018 5.59 5.60 5.10E+09 3225300400019 5.60 5.61 5.43E+09 3225300400020 5.61 5.62 6.01E+09 3225300400021 5.62 5.63 7.70E+09 3225300400022 5.63 5.64 1.29E+10 3225300400023 5.64 5.65 1.25E+10 3225300400024 5.65 5.66 1.21E+10 3225300400025 5.66 5.67 1.17E+10 3225300400026 5.67 5.68 1.14E+10 3225300400027 5.68 5.69 1.11E+10 3225300400028 5.69 5.70 1.07E+10 3225300400029 5.70 5.71 1.04E+10 3225300400030 5.71 5.72 1.01E+10 3225300400031 5.72 5.73 9.84E+09 3225300400032 5.73 5.74 9.56E+09 3225300400033 5.74 5.75 9.30E+09 3225300400034 5.75 5.76 9.05E+09 3225300400035 5.76 5.77 8.81E+09 3225300400036 5.77 5.78 8.58E+09 3225300400037 5.78 5.79 8.36E+09 3225300400038 5.79 5.80 8.15E+09 3225300400039 5.80 5.81 7.95E+09 3225300400040 5.81 5.82 7.75E+09 3225300400041 5.82 5.83 7.57E+09 3225300400042 5.83 5.84 7.39E+09 3225300400043 5.84 5.85 7.22E+09 3225300400044 5.85 5.86 7.06E+09 3225300400045 5.86 5.87 6.90E+09 3225300400046 5.87 5.88 6.75E+09 3225300400047 5.88 5.89 6.60E+09 3225300400048 5.89 5.90 6.46E+09 3225300400049 5.90 5.91 6.32E+09 3225300400050 5.91 5.92 6.19E+09 3225300400051 5.92 5.93 6.06E+09 3225300400052 5.93 5.94 5.94E+09 3225300400053 5.94 5.95 5.81E+09 3225300400054 5.95 5.96 5.69E+09 3225300400055 5.96 5.97 5.58E+09 3225300400056 5.97 5.98 5.46E+09 3225300400057 5.98 5.99 5.34E+09 3225300400058 5.99 6.00 5.23E+09 3225300400059 STATUS (TABLE) Data set received from the authors 3225300400060 HISTORY (20241119R) Spectrum received by e-mail from I.Kadenko.3225300400061 ENDBIB 59 0 3225300400062 NOCOMMON 0 0 3225300400063 NODATA 0 0 3225300400064 ENDSUBENT 63 0 3225300499999 ENDENTRY 4 0 3225399999999