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NSR database version of April 29, 2024.

Search: Author = C.Brase

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2023JO02      Phys.Lett. B 838, 137689 (2023)

L.Jokiniemi, B.Romeo, C.Brase, J.Kotila, P.Soriano, A.Schwenk, J.Menendez

Two-neutrino ββ decay of ¹³⁶Xe to the first excited 0⁺ state in ¹³⁶Ba

RADIOACTIVITY ¹³⁶Xe(2β^-); calculated nuclear matrix element for the two-neutrino ββ decay of ¹³⁶Xe into the first excited state of ¹³⁶Ba using the quasiparticle random-phase approximation (QRPA) framework, the nuclear shell model, the interacting boson model (IBM-2), and an effective field theory (EFT) for β and ββ decays; deduced T_1/2.

doi: 10.1016/j.physletb.2023.137689
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2022BR11      Phys.Rev. C 106, 034309 (2022)

C.Brase, J.Menendez, E.A.Coello Perez, A.Schwenk

Neutrinoless double-β decay from an effective field theory for heavy nuclei

RADIOACTIVITY ⁴⁸Ca, ⁷⁰Zn, ⁷⁶Ge, ^80,82Se, ⁹⁶Zr, ¹⁰⁰Mo, ¹⁰⁴Ru, ¹¹⁰Pd, ^114,116Cd, ^128,130Te, ¹³⁶Xe, ¹⁵⁰Nd(2β^-); ⁶⁴Zn, ^106,108Cd, ¹¹²Sn, ¹²⁴Xe(2β⁺), (2EC); calculated double-Gamow-Teller (DGT) nuclear matrix elements (NMEs) in the EFT for different combinations of neutron and proton orbitals, correlation between DGT and NMEs for 0νββ decay mode, nuclear matrix elements (NMEs) for 0νββ decays using effective field theory (EFT) with a spherical core coupled to additional neutrons and/or protons in the adjacent nuclei; compiled experimental structure data from the ENSDF database for parent nuclei as well as relevant adjacent nuclei and nuclei one neutron and proton away from the parent and double-beta decay daughter nuclei: ⁴⁷Ca, ^47,49Sc, ⁴⁹Ti, ⁶³Ni, ^63,65Cu, ^65,69Zn, ^69,71Ga, ^71,75Ge, ^75,77As, ^77,79,81Se, ^79,81,83Br, ^81,83Kr, ⁹⁹Mo, ^99,101Tc, ^101,103Ru, ^103,105Rh, ^105,107,109Pd, ^{105,107,109,111}Ag, ^{107,109,111,113}Cd, ^111,113,115In, ^113,115Sn, ^123,127,129Te, ^{123,125,127,129,131}I, ^125,129,131Xe, ^135,137Cs, ¹³⁷Ba, ^149,151Pm, ¹⁵¹Sm. Comparison with results from different models: nuclear shell model (NSM), interacting boson model (IBM), effective field theory (EDF), quasiparticle random-phase approximation (QRPA), ab initio using multireference in-medium similarity renormalization group (MR-IMSRG), valence space in-medium similarity renormalization group (VS-IMSRG), and coupled-cluster (CC).

doi: 10.1103/PhysRevC.106.034309
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