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NSR database version of May 22, 2024.

Search: Author = D.L.Fang

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2024DU07      Phys.Rev. C 109, 044325 (2024)

P.-X.Du, T.-Sh.Shang, K.-P.Geng, J.Li, D.-L.Fang

Inference of parameters for the back-shifted Fermi gas model using a feedforward neural network

doi: 10.1103/PhysRevC.109.044325
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2024FA02      Chin.Phys.C 48, 034101 (2024)


What can we learn from recent 2νββ experiments?

RADIOACTIVITY 82Se, 100Mo, 136Xe(2β-); calculated nuclear matrix elements with the quasi-particle random phase approximation (QRPA) approach; deduced Gamow-Teller transition strength under a unique quenched axial-vector coupling constant gA, flipping the sign for the decay strength causes the spectra to go beyond the so-called high-lying state dominance hypothesis.

doi: 10.1088/1674-1137/ad181b
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2023FA03      Phys.Rev. C 107, 015501 (2023)

D.-L.Fang, A.Faessler

0νββ decay to the first 2+ state with a two-nucleon mechanism for a L-R symmetric model

RADIOACTIVITY 76Ge, 82Se, 96Zr, 100Mo, 116Cd, 128,130Te, 136Xe(2β-); calculated phase space factors, nuclear matrix elements for 0νββ-decay to the first 2+ state of daughter nuclei. L-R symmetric model.

doi: 10.1103/PhysRevC.107.015501
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2023GU03      Phys.Rev. C 107, 014318 (2023)

L.Guo, W.L.Lv, Y.F.Niu, D.L.Fang, B.S.Gao, K.A.Li, X.D.Tang

Spin-isospin excitations in the direction of β+ decay for 80Zn and 126Ru at finite temperature

RADIOACTIVITY 80Zn, 126Ru(β+); calculated Gamow-Teller (GT+) strength distribution with respect to the ground state of daughter nuclei, spin-dipole (SD) transition strength distributions, sum-rule values of GT and SD transitions. Self consistent finite-temperature proton-neutron relativistic quasiparticle RPA (FT-PNRQRPA) and finite-temperature proton-neutron relativistic RPA (FT-PNRRPA) model.

doi: 10.1103/PhysRevC.107.014318
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2023LV01      Phys.Rev. C 108, L051304 (2023)

W.-L.Lv, Y.-F.Niu, D.-L.Fang, J.-M.Yao, C.-L.Bai, J.Meng

0νββ-decay nuclear matrix elements in self-consistent Skyrme quasiparticle random-phase approximation: Uncertainty from pairing interaction

doi: 10.1103/PhysRevC.108.L051304
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2022BA38      Chin.Phys.C 46, 114104 (2022)

C.L.Bai, D.L.Fang, H.Q.Zhang, C.L.Bai, D.L.Fang, H.Q.Zhang

Roles of tensor and isoscalar pairing interactions in β-Decay calculations for possible r-process waiting point nuclei with N ∼ 82 and 126

RADIOACTIVITY 120,122,124,126,128,130,132Cd(β-); calculated T1/2 with the self-consistent Hartree-Fock-Bogoliubov (HFB) theory with the proton-neutron quasi-particle random phase approximation (pnQRPA) based on the Skyrme force. Comparison with available data.

doi: 10.1088/1674-1137/ac80ee
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2022LV05      Phys.Rev. C 105, 044331 (2022)

W.L.Lv, Y.F.Niu, D.L.Fang, C.L.Bai

Single-state or low-lying-states dominance mechanism of 2νββ-decay nuclear matrix elements

RADIOACTIVITY 48Ca, 76Ge, 82Se, 96Zr, 100Mo, 116Cd, 128,130Te, 136Xe, 150Nd, 238U(2β-); calculated matrix elements, isoscalar pairing strength parameter, Gamow-teller transition amplitudes. Spherical Skyrme HFB + QRPA model. Single-state dominance (SSD) and low-lying-states dominance (LLD) hypothesis. Comparison to experimental values.

doi: 10.1103/PhysRevC.105.044331
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2021FA01      Phys.Lett. B 813, 136067 (2021)

D.-L.Fang, Y.-F.Li, D.Zhang

Ab initio calculations of reactor antineutrino fluxes with exact lepton wave functions

NUCLEAR REACTIONS 235,238U, 239,241Pu(n, F), E thermal; calculated the isotopic reactor antineutrino fluxes with the exact the radial lepton wave functions, assuming all the decay branches are allowed GT transitions within a new ab initio approach.

doi: 10.1016/j.physletb.2021.136067
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2021FA07      Phys.Rev. C 103, 045501 (2021)

D.-L.Fang, A.Faessler

Nuclear matrix elements for the 0νββ(0+ → 2 decay of 76Ge within the two-nucleon mechanism

RADIOACTIVITY 76Ge(2β-); calculated nuclear matrix elements (NMEs) for 0νββ decay to the first 2+ state of 76Se, with estimated uncertainties using various approximations and parameters such as dependence of the NMEs on the model space for different multipoles, NMEs for a Coulomb-type neutrino potential, NME dependence on the short-range correlations, and NME dependence on particle-particle interaction strengths. Nuclear many body calculation using isospin symmetry restored quasiparticle random phase approximation (QRPA) method with the charge-dependent-Bonn realistic force. Comparison with results of previous calculations based on projected Hartree-Fock-Bogolyubov method.

doi: 10.1103/PhysRevC.103.045501
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2020FA05      Chin.Phys.C 44, 084104 (2020)

D.-L.Fang, A.Faessler

2νββ-decay to first 2+states with partial isospin symmetry restoration from spherical QRPA calculations

RADIOACTIVITY 76Ge, 96Zr, 116Cd, 128,130Te, 82Se, 100Mo, 136Xe(2β-); calculated nuclear matrix elements, phase space factors, T1/2.

doi: 10.1088/1674-1137/44/8/084104
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2020RE12      Phys.Lett. B 809, 135702 (2020), Erratum Phys.Lett. B 820, 136532 (2021)

B.M.Rebeiro, S.Triambak, P.E.Garrett, B.A.Brown, G.C.Ball, R.Lindsay, P.Adsley, V.Bildstein, C.Burbadge, A.Diaz Varela, T.Faestermann, D.L.Fang, R.Hertenberger, M.Horoi, B.Jigmeddorj, M.Kamil, K.G.Leach, P.Z.Mabika, J.C.Nzobadila Ondze, J.N.Orce, H.-F.Wirth

Benchmarking 136Xe neutrinoless ββ decay matrix element calculations with the 138Ba(p, t) reaction

NUCLEAR REACTIONS 138Ba(p, t), (p, p), E=23 MeV; measured reaction products, Ep, Ip; deduced σ(θ), neutrinoless ββ decay matrix elements.

doi: 10.1016/j.physletb.2020.135702
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO2532. Data from this article have been entered in the XUNDL database. For more information, click here.

2018FA04      Phys.Rev. C 97, 045503 (2018)

D.-L.Fang, A.Faessler, F.Simkovic

0νββ decay nuclear matrix element for light and heavy neutrino mass mechanisms from deformed quasiparticle random-phase approximation calculations for 76Ge, 82Se, 130Te, 136Xe, and 150Nd with isospin restoration

NUCLEAR STRUCTURE 76Ge, 76Se, 82Se, 82Kr, 130Te, 130Xe, 136Xe, 136Ba, 150Nd, 150Sm; calculated quadrupole deformation parameters, pairing strengths, BCS overlap, particle-particle interaction strengths for the corresponding parent/daughter pair in double beta decay using deformed Wood-Saxon potential with Coulomb corrections.

RADIOACTIVITY 76Ge, 82Se, 130Te, 136Xe, 150Nd(2β-); calculated nuclear matrix elements (NME) for 0νββ decay mode for both light and heavy neutrino mechanisms by deformed quasiparticle random-phase approach using AV18 and CD-Bonn potentials with and without short range correlations (SRC). Comparison with other theoretical calculations. 150Nd; detailed decomposition of NMEs for 150Nd decay into various intermediate channels, and for different model spaces.

doi: 10.1103/PhysRevC.97.045503
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2016DO05      Phys.Rev. C 93, 064317 (2016)

A.C.Dombos, D.-L.Fang, A.Spyrou, S.J.Quinn, A.Simon, B.A.Brown, K.Cooper, A.E.Gehring, S.N.Liddick, D.J.Morrissey, F.Naqvi, C.S.Sumithrarachchi, R.G.T.Zegers

Total absorption spectroscopy of the β decay of 76Ga

RADIOACTIVITY 76Ga(β-)[from 9Be(76Ge32+, X), E=130 MeV/nucleon and separated by A1900 fragment separator at NSCL-MSU]; measured Eγ, Iγ, total absorption gamma-ray (TAS) spectrum using a segmented NaI(Tl)(SuN) detector, Eβ, Iβ by a silicon surface barrier, βγ-coin, half-life of 76Ga decay; deduced Iβ feedings and compared to the evaluated data in the ENSDF database, β strength functions and B(GT). Comparison with shell-model calculations using jj44b and JUN45 interactions. Relevance to studies of neutrinoless double β-decay of 76Ge.

doi: 10.1103/PhysRevC.93.064317
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Data from this article have been entered in the XUNDL database. For more information, click here.

2016FA03      Phys.Rev. C 93, 034306 (2016)


Effect of the Pauli principle on the deformed quasiparticle random-phase approximation calculations and its consequence for β-decay calculations of deformed even-even nuclei

RADIOACTIVITY 98,100Kr, 98,100,102,104,106Sr, 102,104,106,108,110,112Zr, 108,110,112,114,116Mo, 150,152,154,156,158,160,162,164,166,168,170,172,174Ce, 152,154,156,158,160,162,164,166,168,170,172,174,176Nd, 158,160,162,164,166,168,170,172,174,176,178Sm, 164,166,168,170,172,174,176,178,180Gd(β-); calculated half-lives, B(GT) for 100,102Sr, 110Zr using Pauli exclusion principle (PEP) in quasiparticle random phase approximation (QRPA) and renormalized quasiparticle random phase approximation (nQRPA)calculations by replacing traditional quasiboson approximation (QBA) for the deformed systems. Comparison with available experimental results.

doi: 10.1103/PhysRevC.93.034306
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2016NI07      Phys.Lett. B 756, 273 (2016)

N.Nishimura, Z.Podolyak, D.-L.Fang, T.Suzuki

Impact of the first-forbidden β decay on the production of A ∼ 195 r-process peak

NUCLEAR STRUCTURE A=175-210; calculated isotopic abundances, β-decay rates; deduced effects of first-forbidden transitions in β-decays on the production of the r-process A ∼ 195 peak. Comparison with available data.

doi: 10.1016/j.physletb.2016.03.025
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2015BR15      Phys.Rev. C 92, 041301 (2015)

B.A.Brown, D.L.Fang, M.Horoi

Evaluation of the theoretical nuclear matrix elements for ββ decay of 76Ge

RADIOACTIVITY 76Ge(2β-); calculated nuclear matrix elements (NMEs) for 2νββ and 0νββ decay modes using configuration-interaction (CI), quasiparticle random-phase approximation (QRPA), and interacting boson model methods. Comparison with experimental values.

doi: 10.1103/PhysRevC.92.041301
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2015FA05      Phys.Rev. C 91, 025503 (2015)

D.-L.Fang, B.A.Brown

Effect of first-forbidden decays on the shape of neutrino spectra

RADIOACTIVITY 136Te, 140Xe(β-); calculated levels, J, π in 136I and 140Cs, logft, neutrino spectra of low-lying first-forbidden (FF) β decay branches by shell-model (SM) and pn-QRPA (QRPA). Comparison with available experimental values.

doi: 10.1103/PhysRevC.91.025503
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2015FA11      Phys.Rev. C 92, 044301 (2015)

D.-L.Fang, A.Faessler, F.Simkovic

Partial restoration of isospin symmetry for neutrinoless double β decay in the deformed nuclear system of 150Nd

RADIOACTIVITY 150Nd(2β-); calculated nuclear matrix elements (NME), Fermi and Gamow-Teller matrix elements for the 0νββ decay mode, decomposition of the matrix elements for different values of Kπ using the deformed quasiparticle random-phase approximation (pn-QRPA) method. Isospin symmetry restoration.

doi: 10.1103/PhysRevC.92.044301
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2015MU04      J.Phys.(London) G42, 034027 (2015)

M.Mumpower, R.Surman, D.L.Fang, M.Beard, A.Aprahamian

The impact of uncertain nuclear masses near closed shells on the r-process abundance pattern

doi: 10.1088/0954-3899/42/3/034027
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2015MU12      Phys.Rev. C 92, 035807 (2015)

M.R.Mumpower, R.Surman, D.-L.Fang, M.Beard, P.Moller, T.Kawano, A.Aprahamian

Impact of individual nuclear masses on r-process abundances

NUCLEAR STRUCTURE Z=30-75, N=60-130, A=120-210; calculated relevant Q values, neutron capture rates, photodissociation rates, β-decay rates, and β-delayed neutron emission probabilities using the 2012 version of the Finite-Range Droplet Model (FRDM), and by considering variations of individual nuclear masses; deduced influence of uncertainties in individual masses on the r-process abundance distribution.

doi: 10.1103/PhysRevC.92.035807
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2013FA05      Phys.Rev. C 88, 024314 (2013)

D.-L.Fang, B.A.Brown, T.Suzuki

β-decay properties for neutron-rich Kr-Tc isotopes from deformed pn-quasiparticle random-phase approximation calculations with realistic forces

RADIOACTIVITY 96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111Kr, 97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112Rb, 98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113Sr, 99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114Y, 104,105,106,107,108,109,110,111,112,113,114,115Zr, 105,106,107,108,109,110,111,112,113,114,115,116Nb, 107,108,109,110,111,112,113,114,115,116,117Mo, 108,109,110,111,112,113,114,115,116,117,118Tc(β-), (β-n); calculated half-lives, delayed neutron emission probabilities Pn. 98,100Y, 100Nb, 108Tc; calculated low-spin low-lying levels, J, π; and compared with experimental values. Deformed quasiparticle random-phase approximation (pn-QRPA) method with realistic CD-Bonn forces, including Gamow-Teller and first-forbidden β transitions. Comparison of half-life and Pn values with available data from RIKEN facility. Implications for r-process elemental abundances.

doi: 10.1103/PhysRevC.88.024314
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2013FA08      Phys.Rev. C 88, 034304 (2013)

D.-L.Fang, B.A.Brown, T.Suzuki

Investigating β-decay properties of spherical nuclei along the possible r-process path

RADIOACTIVITY 118,120,122,124,126,128,130,132Cd, 136,138,140Xe, 139Cs, 203,205Au, 207Tl(β-); 124Mo, 125Tc, 126Ru, 127Rh, 128Pd, 129Ag, 130Cd, 131In, 190Gd, 191Tb, 192Dy, 193Ho, 194Er, 195Tm, 196Yb, 197Lu, 198Hf, 199Ta, 113,115,117As, 114,116,118Se, 115,117,119Br, 116,118,120Kr, 117,119,121Rb, 118,120,122Sr, 119,121,123Y, 120,122,124Zr, 121,123,125Nb, 122,124,126Mo, 123,125,127Tc, 124,126,128Ru, 125,127,129Rh, 126,128,130Pd, 127,129,131Ag, 128,130,132Cd, 129,131,133In, 130,132,134Sn, 131,133,135Sb, 174,176Sn, 175,177Sb, 176,178Te, 177,179I, 178,180Xe, 179,181Cs, 180,182,184Ba, 181,183,185La, 182,184,186Ce, 183,185,187Pr, 184,186,188Nd, 185,187,189Pm, 186,188,190Sm, 187,189,191Eu, 188,190,192Gd, 189,191,193Tb, 190,192,194Dy, 191,193,195Ho, 192,194,196Er, 193,195,197Tm, 194,196,198Yb, 195,197,199Lu, 196,198,200Hf, 197,199,201Ta, 198,200,202W, 199,201,203Re, 200,202,204Os, 201,203,205Ir, 202,204,206Pt, 203,205,207Au, 206,208Hg, 207,209Tl(β-), (β-n); calculated Q values, half-life, delayed neutron emission probability Pn, logft, first-forbidden to total ratio. Spherical QRPA + real forces (FRDM+GTF, FRDM+Real, HFB21+Real) using different mass models. Comparison with experimental data. Relevance to r-process path.

NUCLEAR STRUCTURE 118,120,122,124,126,128,130,132Cd, 136,138,140Xe, 139Cs, 203,205Au, 207Tl; calculated levels, J, π. Spherical QRPA + real forces. Comparison with experimental data.

doi: 10.1103/PhysRevC.88.034304
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2012FA02      Phys.Rev. C 85, 035503 (2012)

D.-L.Fang, K.Blaum, S.Eliseev, A.Faessler, M.I.Krivoruchenko, V.Rodin, F.Simkovic

Evaluation of the resonance enhancement effect in neutrinoless double-electron capture in 152Gd, 164Er, and 180W atoms

RADIOACTIVITY 152Gd, 164Er, 180W(2EC); calculated matrix elements and half-lives for neutrinoless double-electron capture. Deformed quasiparticle random-phase approximation using the realistic charge-dependent Bonn (CD-Bonn) nucleon-nucleon interaction. Comparison of half-life with that for neutrinoless 2β decay of 76Ge.

doi: 10.1103/PhysRevC.85.035503
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2010FA17      Phys.Rev. C 82, 051301 (2010)

D.-L.Fang, A.Faessler, V.Rodin, F.Simkovic

Neutrinoless double-β decay of 150Nd accounting for deformation

NUCLEAR STRUCTURE 150Nd(2β-); calculated neutrinoless double-beta decay matrix elements while accounting for β2 deformation parameter. Microscopic calculation with quasiparticle random phase approximation (QRPA) approach and realistic residual interaction. Relevance for SNO+ collaboration and the best sensitivity for the Majorana neutrino mass measurement.

doi: 10.1103/PhysRevC.82.051301
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