Gamow-Teller strength in deformed nuclei within the self-consistent charge-exchange quasiparticle random-phase approximation with the Gogny force

Martini, M.; Péru, S.; Goriely, Stéphane

doi:10.1103/physrevc.89.044306

Cited by 57 publications

(64 citation statements)

References 54 publications

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“…Half-lives for neutron-rich Kr, Sr, Zr, and Mo isotopes calculated from self-consistent deformed QRPA calculations with the Gogny D1M interaction and experimental values of Q β [36] agree with the results in this work within the uncertainties of the calculations. The agreement is also very reasonable between the calculated half-lives and those obtained from deformed QRPA calculations using deformed Woods-Saxon potentials to generate the mean field and complemented with realistic CD-Bonn residual forces [33,34].…”

Section: Beta-decay Half-livessupporting

confidence: 79%

“…One can understand from simple qualitative arguments that the role of FF transitions is expected to be more important in lighter Ge and in Pd isotopes. Thus, for 32 Ge, 34 Se, 36 Kr, and 38 Sr isotopes, the last occupied proton orbitals come basically from the 2p 3/2 ,1f 5/2 , and 2p 1/2 negative-parity spherical shells. On the other hand the neutrons in 80−94 Ge isotopes occupy orbitals belonging to the 1g 9/2 ,2d 5/2 , and 1g 7/2 positive-parity spherical shells.…”

Section: Beta-decay Half-livesmentioning

confidence: 99%

“…First-forbidden transitions were also considered in those references, showing that their effect in this mass region can be neglected. Various self-consistent deformed QRPA calculations to describe the β-decay properties, either with Skyrme [35] or Gogny [36] interactions are also available in the literature.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

β-decay properties of neutron-rich Ge, Se, Kr, Sr, Ru, and Pd isotopes from deformed quasiparticle random-phase approximation

Sarriguren

2015

Phys. Rev. C

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β-decay properties of even-and odd-A neutron-rich Ge, Se, Kr, Sr, Ru, and Pd isotopes involved in the astrophysical rapid neutron capture process are studied within a deformed proton-neutron quasiparticle randomphase approximation. The underlying mean field is described self-consistently from deformed Skyrme-HartreeFock calculations with pairing correlations. Residual interactions in the particle-hole and particle-particle channels are also included in the formalism. The isotopic evolution of the various nuclear equilibrium shapes and the corresponding charge radii are investigated in all the isotopic chains. The energy distributions of the Gamow-Teller strength as well as the β-decay half-lives are discussed and compared with the available experimental information. It is shown that nuclear deformation plays a significant role in the description of the decay properties in this mass region. Reliable predictions of the strength distributions are essential to evaluate decay rates in astrophysical scenarios.

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Section: Beta-decay Half-livessupporting

confidence: 79%

Section: Beta-decay Half-livesmentioning

confidence: 99%

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β-decay properties of neutron-rich Ge, Se, Kr, Sr, Ru, and Pd isotopes from deformed quasiparticle random-phase approximation

Sarriguren

2015

Phys. Rev. C

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“…Most of the experimental half-lives, except 7 nuclei, are reproduced by the theoretical predictions within a factor of 10, which is comparable to the recent theoretical result reported in Ref. [25] which adopts pnQRPA as well but uses Gogny force. The number of nuclei with their half-lives reproduced within a factor of 5 and 2 are 89 and 46, respectively.…”

Section: Resultsupporting

confidence: 77%

Study of Beta-Delayed Neutron with Proton-Neutron QRPA Plus Statistical Model

Minato¹,

Iwamoto

2015

Proceedings of the Conference on Advances in Radioactive Isotope Science (ARIS2014)

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β-delayed neutron is known to be important for safety operation of nuclear reactor and prediction of elemental abundance after freeze-out of r-process. A lot of researches on it have been performed. However, the experimental data are far from complete since the lifetime of most of the relevant nuclei is so short that one cannot measure in a high efficiency. In order to estimate half-lives and delayed neutron emission probabilities of unexplored nuclei, we developed a new theoretical method which combines a proton-neutron quasi-particle randomphase-approximation and the Hauser-Feshbach statistical model. The present method reproduces experimentally known β-decay half-lives within a factor of 10 and about 40% of within a factor of 2. However it fails to reproduce delayed neutron emission probabilities. We discuss the problems and remedy for them to be made in future.

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“…Moreover, it can give a detailed nuclear structure of excited states. The systematical calculations of half-lives and branching ratio of DN using QRPA have been performed not only by non-relativistic but also relativistic approaches [9][10][11]. Finite amplitude method, which is equivalent to QRPA, was also applied to systematical β-decay calculation [12].…”

Section: Introductionmentioning

confidence: 99%

Calculation of Beta Decay Half-Lives and Delayed Neutron Branching Ratio of Fission Fragments with Skyrme-QRPA

Minato

2016

EPJ Web of Conferences

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Abstract. Nuclear β-decay and delayed neutron (DN) emission is important for the rprocess nucleosynthesis after the freeze-out, and stable and safe operation of nuclear reactors. Even though radioactive beam facilities have enabled us to measure β-decay and branching ratio of neutron-rich nuclei apart from the stability line in the nuclear chart, there are still a lot of nuclei which one cannot investigate experimentally. In particular, information on DN is rather scarce than that of T 1/2 . To predict T 1/2 and the branching ratios of DN for next JENDL decay data, we have developed a method which comprises the quasiparticle-random-phase-approximation (QRPA) and the Hauser-Feshbach statistical model (HFSM). In this work, we calculate fission fragments with T 1/2 ≤ 50 sec. We obtain the rms deviation from experimental half-life of 3.71. Although the result is still worse than GT2 which has been adopted in JENDL decay data, DN spectra are newly calculated. We also discuss further subjects to be done in future for improving the present approach and making next generation of JENDL decay data.

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Gamow-Teller strength in deformed nuclei within the self-consistent charge-exchange quasiparticle random-phase approximation with the Gogny force

Cited by 57 publications

References 54 publications

β-decay properties of neutron-rich Ge, Se, Kr, Sr, Ru, and Pd isotopes from deformed quasiparticle random-phase approximation

β-decay properties of neutron-rich Ge, Se, Kr, Sr, Ru, and Pd isotopes from deformed quasiparticle random-phase approximation

Study of Beta-Delayed Neutron with Proton-Neutron QRPA Plus Statistical Model

Calculation of Beta Decay Half-Lives and Delayed Neutron Branching Ratio of Fission Fragments with Skyrme-QRPA

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