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NSR database version of April 11, 2024.

Search: Author = M.Haaranen

Found 7 matches.

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2017HA06      Phys.Rev. C 95, 024327 (2017)

M.Haaranen, J.Kotila, J.Suhonen

Spectrum-shape method and the next-to-leading-order terms of the β-decay shape factor

RADIOACTIVITY 113Cd, 115In(β-); calculated leading-order (Lo) and next-to-leading-order (NLO) nuclear matrix elements (NMEs) of fourth-forbidden ground-state to ground-state β transitions, partial half-lives as a function of axial-vector coupling constant gA, with vector coupling constant gV=1, β spectra and shape factors; deduced effective values of gA. Spectrum-shape method (SSM), with three nuclear-structure theory frameworks: nuclear shell model (NSM), microscopic interacting boson-fermion model (IBM), and microscopic quasiparticle-phonon model (MQPM). Comparison with experimental β spectra.

doi: 10.1103/PhysRevC.95.024327
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2017KO12      Phys.Rev. C 95, 044313 (2017)

J.Kostensalo, M.Haaranen, J.Suhonen

Electron spectra in forbidden β decays and the quenching of the weak axial-vector coupling constant gA

RADIOACTIVITY 125Te, 141Ce, 159Gd, 161Tb, 169Er, 79Se, 85Kr, 89Sr, 107Pd, 125Sb, 135,137Cs, 129I, 93,97Zr, 99Tc, 85Br, 87Rb, 113,115,117Cd, 115,119In, 101Mo, 123Sn(β-); calculated shapes of β spectra, integrated shape functions and their vector CV, axial-vector CA, and mixed components VVA for 26 first to fifth non-unique, and first- and second-unique β- decays using the nuclear matrix elements (NMEs) derived from the microscopic quasiparticle-phonon model (MQPM) and by varying the value of the axial-vector coupling constant gA and including next-to-leading-order terms. Spectrum shape method (SSM). Effective values of the weak coupling constants. Step towards solving the gA problem of neutrinoless double beta decay.

NUCLEAR STRUCTURE 87Sr; calculated levels, J, π using microscopic quasiparticle-phonon model (MQPM), and compared with experimental spectrum.

doi: 10.1103/PhysRevC.95.044313
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2016AL03      Phys.Rev.Lett. 116, 072501 (2016)

M.Alanssari, D.Frekers, T.Eronen, L.Canete, J.Dilling, M.Haaranen, J.Hakala, M.Holl, M.Jeskovsky, A.Jokinen, A.Kankainen, J.Koponen, A.J.Mayer, I.D.Moore, D.A.Nesterenko, I.Pohjalainen, P.Povinec, J.Reinikainen, S.Rinta-Antila, P.C.Srivastava, J.Suhonen, R.I.Thompson, A.Voss, M.E.Wieser

Single and Double Beta-Decay Q Values among the Triplet96Zr, 96Nb, and 96Mo

ATOMIC MASSES 96Zr, 96Nb, 96Mo; measured time-of-flight spectra using a Ramsey excitation pattern, cyclotron-frequency ratios; deduced Q-values for β and 2β-decays. Comparison with AME2012, IGISOL-JYFLTRAP facility.

doi: 10.1103/PhysRevLett.116.072501
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2016HA06      Phys.Rev. C 93, 034308 (2016)

M.Haaranen, P.C.Srivastava, J.Suhonen

Forbidden nonunique β decays and effective values of weak coupling constants

RADIOACTIVITY 113Cd, 115In(β-); calculated partial half-lives and β spectrum shapes of fourth-forbidden nonunique g.s. to g.s. β decay branches as function of axial-vector coupling constant gA using microscopic quasiparticle-phonon model (MQPM) and nuclear shell model (NSM). Comparison with experimental results. Discussed application and power of spectrum-shape method (SSM).

doi: 10.1103/PhysRevC.93.034308
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2014HA06      Phys.Rev. C 89, 034315 (2014)

M.Haaranen, M.Horoi, J.Suhonen

Shell-model study of the 4th- and 6th-forbidden β-decay branches of 48Ca

RADIOACTIVITY 48Ca(β-), (2β-); calculated partial half-lives for 4th and 6th-forbidden β decays to 6+, 5+ and 4+ states in 48Sc. Competition between single β decay and 2νββ decay branches. Shell-model calculations using GXPF1A effective interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.89.034315
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2014HA33      Phys.Rev. C 90, 044314 (2014)

M.Haaranen, P.C.Srivastava, J.Suhonen, K.Zuber

β-decay half-life of 50V calculated by the shell model

RADIOACTIVITY 50V(β-), (EC); calculated one-body transition densities (OBTDs) and nuclear matrix elements (NMEs), partial half-lives for 4th-forbidden non-unique β transitions from 6+ ground state of 50V to first 2+ states in 50Cr and 50Ti. Shell model calculations with the GXPF1A interaction in the full f-p shell. Comparison with experimental half-lives.

NUCLEAR STRUCTURE 50Ti, 50V, 50Cr; calculated levels, J, π, B(E2), electric quadrupole and magnetic dipole moments. Comparison with experimental results. Shell model calculations with the GXPF1A interaction in the full f-p shell.

doi: 10.1103/PhysRevC.90.044314
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2013HA24      Eur.Phys.J. A 49, 93 (2013)

M.Haaranen, J.Suhonen

Beta decay of 115Cd and its possible ultra-low Q-value branch

RADIOACTIVITY 115Cd(β-); calculated 115Cd to 115In β-decay transitions, low-energy levels, J, π using MQPM (microscopic quasiparticle-phonon model), T1/2.

doi: 10.1140/epja/i2013-13093-8
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