Phys.Rev. C 101, 014319 (2020)

L.Neufcourt, Y.Cao, S.Giuliani, W.Nazarewicz, E.Olsen, O.B.Tarasov

Beyond the proton drip line: Bayesian analysis of proton-emitting nuclei

RADIOACTIVITY ¹⁹Mg, ⁴⁵Fe, ⁴⁸Ni, ⁵⁴Zn, ⁶⁷Kr(2p); calculated Q(2p) using eleven global mass models: Skyrme models SkM*, SkP, SLy4, SV-min, UNEDF0, UNEDF1, UNEDF2, BCPM and D1M, FRDM-2012 and HFB-24, and Bayesian model averaging (BMA) results: BMA-0, BMA-I, BMA-II, BMA-III, and comparing with experimental data from AME2016 and later literature. Z=17-82; calculated nuclear binding-energy, and probability of proton decay, relative to the neutron number of the lightest proton-bound isotope with known experimental S(p) or S(2p), in the proton-rich region using BMA-I and BMA-II model averaging methods. ^25,26,27S, ^29,30,31Ar, ^33,34,35Ca, ^37,38,39Ti, ^40,41,42,43Cr, ^44,45,46Fe, ^47,48,49,50Ni, ^52,53,54,55Zn, ^56,57,58,59Ge, ^61,62,63,64Se, ^{64,65,66,67,68}Kr, ^{68,69,70,71,72}Sr, ^{72,73,74,75,76}Zr, ^{76,77,78,79,80}Mo, ^{80,81,82,83,84}Ru, ^{83,84,85,86,87,88}Pd, ^{87,88,89,90,91}Cd, ^{91,92,93,94,95}Sn, ^{100,101,102,103}Te, ^{104,105,106,107}Xe, ^{108,109,110,111,112}Ba, ^{111,112,113,114,115,116}Ce, ^{115,116,117,118,119}Nd, ^{119,120,121,122,123,124}Sm, ^{123,124,125,126,127,128,129}Gd, ^{128,129,130,131,132,133,134}Dy, ^{131,132,133,134,135,136,137}Er, ^{135,136,137,138,139,140,141,142}Yb, ^{141,142,143,144,145,146,147}Hf, ^{145,146,147,148,149,150}W, ^{150,151,152,153,154,155}Os, ^{152,153,154,155,156,157,158}Pt, ^{156,157,158,159,160,161,162}Hg(2p); calculated Q(2p) and half-lives using BMA-1 method. ³⁰Ar, ³⁴Ca, ³⁹Ti, ⁴²Cr, ⁵⁸Ge, ⁶²Se, ⁶⁶Kr, ⁷⁰Sr, ⁷⁴Zr, ⁷⁸Mo, ⁸²Ru, ⁸⁶Pd, ⁹⁰Cd, ¹⁰³Te; predicted as most promising 2p emitters. ^131,132Dy, ^134,135Er, ^144,145Hf; predicted as excellent candidates for the sequential emission of two protons. Bayesian Gaussian processes for separation-energy residuals and combined via Bayesian model averaging for mass predictions, with uncertainty quantification of theoretical predictions.

doi: 10.1103/PhysRevC.101.014319