ENTRY 32251 20210603 32013225100000001 SUBENT 32251001 20210603 32013225100100001 BIB 11 28 3225100100002 TITLE Statistically significant observation of and 3225100100003 cross-sections for a new nuclear reaction channel on 3225100100004 197Au with bound dineutron escape 3225100100005 AUTHOR (I.M.Kadenko,B.Biro,A.Fenyvesi) 3225100100006 INSTITUTE (4UKRKGU,3HUNDEB) 3225100100007 REFERENCE (J,EUL,131,52001,2020) 3225100100008 #doi:10.1209/0295-5075/131/52001 3225100100009 FACILITY (CYCLO,3HUNDEB) The MGC-20E cyclotron. 3225100100010 INC-SOURCE (D-D) The energies of the deuterons were 3225100100011 Ed = 3.459 MeV and Ed = 3.523 MeV. The energy spread 3225100100012 of the analysed deuteron beam was dEd/Ed = 0.1%. 3225100100013 DETECTOR (HPGE) 3225100100014 METHOD (ACTIV) 3225100100015 ANALYSIS It was estimated: 3225100100016 The contribution of the 196 Hg(n, X)196 Au 3225100100017 nuclear interference to the 196g Au production was 3225100100018 less than 1% (taking into account that the evaluated 3225100100019 cross sections of the 196Hg(n, X)196Au reaction are 3225100100020 9.6 mb at En = 6.0 MeV and 24.5 mb at En = 6.8 MeV). 3225100100021 The contribution of the 197 Au(n, 2n)196g Au reaction 3225100100022 to the measured net areas of the gamma peaks observed 3225100100023 at 332.983 and 355.983 keV energies is about 6.e-4%. 3225100100024 The contribution of the 196 Hg(n, p)196g Au nuclear 3225100100025 reaction to 196g Au production in the samples of gold 3225100100026 via this nuclear reaction channel is about 1.4e-11%. 3225100100027 DECAY-DATA (79-AU-196-G,6.183D,DG,332.983,0.229, 3225100100028 DG,355.684,0.87) 3225100100029 HISTORY (20210424C) UkrNDC 3225100100030 ENDBIB 28 0 3225100100031 NOCOMMON 0 0 3225100100032 ENDSUBENT 31 0 3225100199999 SUBENT 32251002 20210603 32013225100200001 BIB 4 25 3225100200002 REACTION (79-AU-197(N,X)79-AU-196,,SIG,,MSC/SPA) 3225100200003 X = a bound dineutron 3225100200004 SAMPLE Three Au foil samples (99.9 per cent by weight Au of 3225100200005 chemical purity) 100 mu-m thick and 1.3 cm diameter 3225100200006 putted in a closed cadmium cover of 0.51 mm wall 3225100200007 thickness. The presence of Hg (0.1 wt%) with natural 3225100200008 isotopic composition and minor Bi (<0.01 wt%) were 3225100200009 detected as impurities. 3225100200010 ERR-ANALYS (ERR-T) The main contributors for the total uncertainty3225100200011 were as follows. 3225100200012 (ERR-1,,10.) Positioning of the stacks in front of the 3225100200013 D2-gas target, <10%. 3225100200014 (ERR-2,,5.) Limited knowledge on the possible 3225100200015 contribution of neutrons generated by the bombarding 3225100200016 deuteron beam impinged on the Ta collimators, the Nb 3225100200017 window foil and the W beam stop, <5%. 3225100200018 (ERR-S) Counting statistics. 3225100200019 (ERR-3) Uncertainty of the detection efficiencies 3225100200020 estimated for the counting geometry used at the HPGe 3225100200021 detector at Atomki. 3225100200022 The partial uncertainties were summed up in 3225100200023 quadrature and then the square root of the sum was 3225100200024 used for estimation of the total uncertainty. 3225100200025 STATUS (TABLE) Tab.1 (p.52001-p5) in EPL,131,52001,2020. 3225100200026 (SUPPL,32251004) Calculated neutron spectrum 3225100200027 ENDBIB 25 0 3225100200028 COMMON 2 3 3225100200029 ERR-S ERR-3 3225100200030 PER-CENT PER-CENT 3225100200031 22. 17. 3225100200032 ENDCOMMON 3 0 3225100200033 DATA 4 1 3225100200034 EN-MIN EN-MAX DATA ERR-T 3225100200035 MEV MEV MB MB 3225100200036 6.09 6.39 0.18 0.06 3225100200037 ENDDATA 3 0 3225100200038 ENDSUBENT 37 0 3225100299999 SUBENT 32251003 20210603 32013225100300001 BIB 4 27 3225100300002 REACTION (79-AU-197(N,X)79-AU-196,,SIG,,MSC/SPA) 3225100300003 X = a bound dineutron 3225100300004 SAMPLE Three Au foils (99.9 per cent by weight Au of 3225100300005 chemical purity)- two samples of 12.2 mm diameter and 3225100300006 150 mu-m thickness and one Au sample of the same 3225100300007 diameter and 200 mu-m thickness stacked and covered by 3225100300008 1 mm thick cadmium shielding. The presence of 3225100300009 Hg (0.1 wt%) with natural isotopic composition and 3225100300010 minor Bi (<0.01 wt%) were detected as impurities. 3225100300011 ERR-ANALYS (ERR-T) The main contributors for the total uncertainty3225100300012 were as follows. 3225100300013 (ERR-1,,10.) Positioning of the stacks in front of the 3225100300014 D2-gas target, <10%. 3225100300015 (ERR-2,,5.) Limited knowledge on the possible 3225100300016 contribution of neutrons generated by the bombarding 3225100300017 deuteron beam impinged on the Ta collimators, the Nb 3225100300018 window foil and the W beam stop, <5%. 3225100300019 (ERR-S) Counting statistics. 3225100300020 (ERR-3) Uncertainty of the detection efficiencies 3225100300021 estimated for the counting geometry used at the HPGe 3225100300022 detector at Atomki. 3225100300023 The partial uncertainties were summed up in 3225100300024 quadrature and then the square root of the sum was 3225100300025 used for estimation of the total uncertainty. 3225100300026 STATUS (TABLE) Tab.1 (p.52001-p5) in EPL,131,52001,2020. 3225100300027 (SUPPL,32251005) Calculated neutron spectrum 3225100300028 (APRVD) ERR-S, ERR-3 values were obtained from AUTHOR 3225100300029 ENDBIB 27 0 3225100300030 COMMON 2 3 3225100300031 ERR-S ERR-3 3225100300032 PER-CENT PER-CENT 3225100300033 16. 11. 3225100300034 ENDCOMMON 3 0 3225100300035 DATA 4 1 3225100300036 EN-MIN EN-MAX DATA ERR-T 3225100300037 MEV MEV MB MB 3225100300038 6.175 6.455 0.037 0.008 3225100300039 ENDDATA 3 0 3225100300040 ENDSUBENT 39 0 3225100399999 SUBENT 32251004 20210603 32013225100400001 BIB 2 110 3225100400002 STATUS (TABLE) Correspond to Fig.3 in EPL,131,52001,2020. 3225100400003 SUPPL-INF (INCSP) The calculated spectrum of the d + D neutrons 3225100400004 for the geometry centres of the foil stacks 3225100400005 (En;average = 6.39 MeV). 3225100400006 The NeuSDesc code was used for calculation of the 3225100400007 neutron spectrum and the neutron fluence rates. 3225100400008 Col. 1: Incident neutron energy (MeV) 3225100400009 Col. 2: Neutron fluence (n/cm2) 3225100400010 --------------------------- 3225100400011 6.089 0.00E+00 3225100400012 6.092 1.71E+05 3225100400013 6.095 2.47E+05 3225100400014 6.098 2.39E+05 3225100400015 6.101 2.32E+05 3225100400016 6.104 2.24E+05 3225100400017 6.107 2.17E+05 3225100400018 6.11 2.11E+05 3225100400019 6.113 2.04E+05 3225100400020 6.1161 1.98E+05 3225100400021 6.1191 1.92E+05 3225100400022 6.1221 1.87E+05 3225100400023 6.1251 1.81E+05 3225100400024 6.1281 1.76E+05 3225100400025 6.1311 1.71E+05 3225100400026 6.1341 1.67E+05 3225100400027 6.1371 1.62E+05 3225100400028 6.1401 1.58E+05 3225100400029 6.1431 1.54E+05 3225100400030 6.1461 1.50E+05 3225100400031 6.1491 1.46E+05 3225100400032 6.1522 1.42E+05 3225100400033 6.1552 1.39E+05 3225100400034 6.1582 1.35E+05 3225100400035 6.1612 1.32E+05 3225100400036 6.1642 1.29E+05 3225100400037 6.1672 1.26E+05 3225100400038 6.1702 1.23E+05 3225100400039 6.1732 1.20E+05 3225100400040 6.1762 1.17E+05 3225100400041 6.1792 1.15E+05 3225100400042 6.1822 1.12E+05 3225100400043 6.1852 1.10E+05 3225100400044 6.1883 1.07E+05 3225100400045 6.1913 1.05E+05 3225100400046 6.1943 1.03E+05 3225100400047 6.1973 1.01E+05 3225100400048 6.2003 9.85E+04 3225100400049 6.2033 9.64E+04 3225100400050 6.2063 9.45E+04 3225100400051 6.2093 9.26E+04 3225100400052 6.2123 9.07E+04 3225100400053 6.2153 8.90E+04 3225100400054 6.2183 8.72E+04 3225100400055 6.2213 8.56E+04 3225100400056 6.2243 8.39E+04 3225100400057 6.2274 8.23E+04 3225100400058 6.2304 8.08E+04 3225100400059 6.2334 7.93E+04 3225100400060 6.2364 7.79E+04 3225100400061 6.2394 7.65E+04 3225100400062 6.2424 7.51E+04 3225100400063 6.2454 7.37E+04 3225100400064 6.2484 7.24E+04 3225100400065 6.2514 7.12E+04 3225100400066 6.2544 6.99E+04 3225100400067 6.2574 6.87E+04 3225100400068 6.2604 6.76E+04 3225100400069 6.2635 6.64E+04 3225100400070 6.2665 6.53E+04 3225100400071 6.2695 6.42E+04 3225100400072 6.2725 6.32E+04 3225100400073 6.2755 6.22E+04 3225100400074 6.2785 6.12E+04 3225100400075 6.2815 6.02E+04 3225100400076 6.2845 5.92E+04 3225100400077 6.2875 5.83E+04 3225100400078 6.2905 5.74E+04 3225100400079 6.2935 5.65E+04 3225100400080 6.2965 5.56E+04 3225100400081 6.2996 5.48E+04 3225100400082 6.3026 5.40E+04 3225100400083 6.3056 5.32E+04 3225100400084 6.3086 5.24E+04 3225100400085 6.3116 5.16E+04 3225100400086 6.3146 5.09E+04 3225100400087 6.3176 5.01E+04 3225100400088 6.3206 4.94E+04 3225100400089 6.3236 4.87E+04 3225100400090 6.3266 4.80E+04 3225100400091 6.3296 4.73E+04 3225100400092 6.3326 4.67E+04 3225100400093 6.3357 4.60E+04 3225100400094 6.3387 4.54E+04 3225100400095 6.3417 4.48E+04 3225100400096 6.3447 4.42E+04 3225100400097 6.3477 4.36E+04 3225100400098 6.3507 4.30E+04 3225100400099 6.3537 4.24E+04 3225100400100 6.3567 4.19E+04 3225100400101 6.3597 4.13E+04 3225100400102 6.3627 4.08E+04 3225100400103 6.3657 4.03E+04 3225100400104 6.3687 3.97E+04 3225100400105 6.3718 3.92E+04 3225100400106 6.3748 3.87E+04 3225100400107 6.3778 3.83E+04 3225100400108 6.3808 3.78E+04 3225100400109 6.3838 3.73E+04 3225100400110 6.3868 3.36E+04 3225100400111 6.3898 0.00E+00 3225100400112 ENDBIB 110 0 3225100400113 NOCOMMON 0 0 3225100400114 NODATA 0 0 3225100400115 ENDSUBENT 114 0 3225100499999 SUBENT 32251005 20210603 32013225100500001 BIB 2 110 3225100500002 STATUS (TABLE) Correspond to Fig.3 in EPL,131,52001,2020. 3225100500003 SUPPL-INF (INCSP) The calculated spectrum of the d + D neutrons 3225100500004 for the geometry centres of the foil stacks 3225100500005 (En;average = 6.275 MeV). 3225100500006 The NeuSDesc code was used for calculation of the 3225100500007 neutron spectrum and the neutron fluence rates. 3225100500008 Col. 1: Incident neutron energy (MeV) 3225100500009 Col. 2: Neutron fluence (n/cm2) 3225100500010 --------------------------- 3225100500011 6.1649 0.00E+00 3225100500012 6.1679 1.71E+05 3225100500013 6.1708 2.50E+05 3225100500014 6.1737 2.42E+05 3225100500015 6.1766 2.34E+05 3225100500016 6.1796 2.27E+05 3225100500017 6.1825 2.20E+05 3225100500018 6.1854 2.13E+05 3225100500019 6.1884 2.06E+05 3225100500020 6.1913 2.00E+05 3225100500021 6.1942 1.94E+05 3225100500022 6.1972 1.89E+05 3225100500023 6.2001 1.83E+05 3225100500024 6.203 1.78E+05 3225100500025 6.2059 1.73E+05 3225100500026 6.2089 1.68E+05 3225100500027 6.2118 1.64E+05 3225100500028 6.2147 1.59E+05 3225100500029 6.2177 1.55E+05 3225100500030 6.2206 1.51E+05 3225100500031 6.2235 1.47E+05 3225100500032 6.2264 1.44E+05 3225100500033 6.2294 1.40E+05 3225100500034 6.2323 1.37E+05 3225100500035 6.2352 1.33E+05 3225100500036 6.2382 1.30E+05 3225100500037 6.2411 1.27E+05 3225100500038 6.244 1.24E+05 3225100500039 6.247 1.21E+05 3225100500040 6.2499 1.19E+05 3225100500041 6.2528 1.16E+05 3225100500042 6.2557 1.13E+05 3225100500043 6.2587 1.11E+05 3225100500044 6.2616 1.08E+05 3225100500045 6.2645 1.06E+05 3225100500046 6.2675 1.04E+05 3225100500047 6.2704 1.02E+05 3225100500048 6.2733 9.94E+04 3225100500049 6.2762 9.74E+04 3225100500050 6.2792 9.54E+04 3225100500051 6.2821 9.35E+04 3225100500052 6.285 9.16E+04 3225100500053 6.288 8.98E+04 3225100500054 6.2909 8.81E+04 3225100500055 6.2938 8.64E+04 3225100500056 6.2967 8.47E+04 3225100500057 6.2997 8.31E+04 3225100500058 6.3026 8.16E+04 3225100500059 6.3055 8.00E+04 3225100500060 6.3085 7.86E+04 3225100500061 6.3114 7.72E+04 3225100500062 6.3143 7.58E+04 3225100500063 6.3173 7.44E+04 3225100500064 6.3202 7.31E+04 3225100500065 6.3231 7.18E+04 3225100500066 6.326 7.06E+04 3225100500067 6.329 6.94E+04 3225100500068 6.3319 6.82E+04 3225100500069 6.3348 6.71E+04 3225100500070 6.3378 6.59E+04 3225100500071 6.3407 6.48E+04 3225100500072 6.3436 6.38E+04 3225100500073 6.3465 6.27E+04 3225100500074 6.3495 6.17E+04 3225100500075 6.3524 6.07E+04 3225100500076 6.3553 5.97E+04 3225100500077 6.3583 5.88E+04 3225100500078 6.3612 5.79E+04 3225100500079 6.3641 5.70E+04 3225100500080 6.3671 5.61E+04 3225100500081 6.37 5.52E+04 3225100500082 6.3729 5.44E+04 3225100500083 6.3758 5.36E+04 3225100500084 6.3788 5.28E+04 3225100500085 6.3817 5.20E+04 3225100500086 6.3846 5.13E+04 3225100500087 6.3876 5.05E+04 3225100500088 6.3905 4.98E+04 3225100500089 6.3934 4.90E+04 3225100500090 6.3963 4.83E+04 3225100500091 6.3993 4.77E+04 3225100500092 6.4022 4.70E+04 3225100500093 6.4051 4.64E+04 3225100500094 6.4081 4.57E+04 3225100500095 6.411 4.51E+04 3225100500096 6.4139 4.45E+04 3225100500097 6.4169 4.39E+04 3225100500098 6.4198 4.33E+04 3225100500099 6.4227 4.27E+04 3225100500100 6.4256 4.21E+04 3225100500101 6.4286 4.16E+04 3225100500102 6.4315 4.11E+04 3225100500103 6.4344 4.05E+04 3225100500104 6.4374 4.00E+04 3225100500105 6.4403 3.95E+04 3225100500106 6.4432 3.90E+04 3225100500107 6.4461 3.85E+04 3225100500108 6.4491 3.80E+04 3225100500109 6.452 3.75E+04 3225100500110 6.4549 3.38E+04 3225100500111 6.4579 0.00E+00 3225100500112 ENDBIB 110 0 3225100500113 NOCOMMON 0 0 3225100500114 NODATA 0 0 3225100500115 ENDSUBENT 114 0 3225100599999 ENDENTRY 5 0 3225199999999