<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>β</mml:mi></mml:math>decay rates of<b><i>r</i></b>-process waiting-point nuclei in a self-consistent approach

Engel, J.; Bender, M.; Dobaczewski, J.; Nazarewicz, W.; Surman, Rebecca

doi:10.1103/physrevc.60.014302

Cited by 265 publications

(324 citation statements)

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“…The μ and β 2 of 199g Pt were calculated using the same framework for the calculations of 193g,195g,197g (5) μ N is about 30% of the Schmidt value and is much larger than the Schmidt value. The measured μ for Hg, Pb, and Po isotopes with I π = 13/2 + were reported to be approximately −1.0μ N , which are also about 50% of the Schmidt value.…”

Section: Discussionmentioning

confidence: 99%

“…Another XeCl excimer laser of λ 2 = 308 nm with a laser power of 9 mJ/pulse was used for the ionization transition to the continuum above the ionization potential (IP). In the laser ionization spectroscopy, the transition between the ground state 5d 9 6s 3 D 3 and the excited state 5d 8 6s6p 5 F 0 4 was studied by scanning the wavelength λ 1 . A systematic study of the gas-pressure effects was performed using stable platinum isotopes with mass numbers A = 192, 194, 195, 196, and 198 respectively.…”

Section: Kissmentioning

confidence: 99%

“…This makes it difficult to predict nuclear properties such as half-lives and nuclear masses in neutron-rich nuclei around N = 126 using theoretical nuclear models [1][2][3]. For example, estimated half-lives of these nuclei typically differ by an order of magnitude [4][5][6][7][8]. The half-life is an important factor in investigations into astrophysical environments and nuclear structure.…”

Section: Introductionmentioning

confidence: 99%

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In-gas-cell laser spectroscopy of the magnetic dipole moment of the N≈126 isotope Pt199

et al. 2017

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The magnetic dipole moment and mean-square charge radius of 199g Pt (I π = 5/2 − , t 1/2 = 30.8 min) ground state and 199m Pt (E ex = 424 keV, I π = (13/2) + , t 1/2 = 13.6 s) isomeric state are evaluated for the first time from investigations of the hyperfine splitting of the λ 1 = 248.792 nm transition by in-gas-cell laser ionization spectroscopy. Ground and isomeric states of neutron-rich 199 Pt nucleus were produced by a multinucleon transfer reaction at the KEK Isotope Separation System (KISS), designed for the study of nuclear spectroscopy in the vicinity of N = 126. The measured magnetic dipole moments +0.75(8)μ N and −0.57(5)μ N are consistent with the systematics of those of nuclei with I π = 5/2 − and I π = 13/2 + , respectively.

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Section: Discussionmentioning

confidence: 99%

Section: Kissmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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In-gas-cell laser spectroscopy of the magnetic dipole moment of the N≈126 isotope Pt199

et al. 2017

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“…Using Skyrme interactions, the work of Ref. [127] was the first to demonstrate that a fully self-consistent Quasiparticle RPA (QRPA) calculation of β-decay tends to overestimate the experimental half-lives. The proton-neutron (T = 0) pairing residual force can produce an additional attractive effect and bring the half-lives in agreement with data.…”

Section: β-Decaymentioning

confidence: 99%

Tensor interaction in mean-field and density functional theory approaches to nuclear structure

Sagawa

Colò

2014

Progress in Particle and Nuclear Physics

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The importance of the tensor force for nuclear structure has been recognized long ago. Recently, the interest for this topic has been revived by the study of the evolution of nuclear properties far from the stability line. However, in the context of the effective theories that describe medium-heavy nuclei, the role of the tensor force is still debated. This review focuses on ground-state properties like masses and deformation, on single-particle states, and on excited vibrational and rotational modes. The goal is to assess which properties, if any, can bring clear signatures of the tensor force within the mean-field or density functional theory framework. It will be concluded that, while evidences for a clear neutron-proton tensor force exist despite quantitative uncertainties, the role of the tensor force among equal particles is less well established.

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“…These calculations are based on allowed GT-transitions. Many theoretical calculations from the quasiparticle random phase approximation (QRPA) based on the HartreeFock Bogoliubov theory [18] or other global models [19,20,21] are available in the literature. These calculations underestimate the correlation among nucleons which predict GT-strength at low-energies.…”

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confidence: 99%

Nuclearβ⁻-decay half-lives for ${fp}$ and ${fpg}$ shell nuclei

Kumar

Srivastava

2016

J. Phys. G: Nucl. Part. Phys.

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Abstract. In the present work we calculate the allowed β − -decay half-lives of nuclei with Z = 20 − 30 and N ≤ 50 systematically under the framework of the nuclear shell model. A recent study shows that some nuclei in this region belong to the island of inversion. We perform calculation for f p shell nuclei using KB3G effective interaction. In the case of Ni, Cu, and Zn, we used JUN45 effective interaction. Theoretical results of Q values, half-lives, excitation energies, logf t values, and branching fractions are discussed and compared with the experimental data. In the Ni region, we also compared our calculated results with recent experimental data [Z. Y. Xu et al., Phys. Rev. Lett. 113, 032505, 2014]. Present results agree with the experimental data of half-lives in comparison to QRPA. Nuclear β − -decay half-lives for f p and f pg shell nuclei 2 IntroductionThe neutron density becomes very diffused and the single-particle spectrum shows the similarity of the harmonic-oscillator as we approach towards the neutron-drip line [1,2]. We can see this effect at N = 40 shell gap. Recently intruder configurations are found in the neutron rich nuclei around this shell gap [3,4,5,6,7]. Thus the nuclear structure study of these nuclei in this region is very important [8,9,10].Sorlin et al. Using RIBF facility at RIKEN, the half-lives of twenty neutron-rich nuclei with Z = 27 − 30 are reported in ref. [14]. In that work, sizable magicity was reported for both the proton number Z = 28 and the neutron number N = 50 in 78 Ni. A sudden shortening of half-lives of the nickel isotopes beyond N = 50 were observed in this work, although this effect is not found in the Cu-Ge-Ga chains. The half-lives results from LISE2000 spectrometer at GANIL for 71 Co and 73 Co are reported in ref.[15]. The half-lives of 77,78 Ni were measured for the first time by Hosmer et al. [16], at NSCL, MSU. Recently the beta decay half-lives of 38 very neutron-rich Kr to Tc isotopes are measured at RIKEN [17].Despite the progress in the experimental side, we need theoretical estimates for half-lives of neutron rich nuclei, especially those belonging to the island of inversion. These calculations are based on allowed GT-transitions. Many theoretical calculations from the quasiparticle random phase approximation (QRPA) based on the HartreeFock Bogoliubov theory [18] or other global models [19,20,21] are available in the literature. These calculations underestimate the correlation among nucleons which predict GT-strength at low-energies. Recently, shell model calculations for the β − -decays of Z = 9 − 13 nuclei are reported by Li and Ren [22]. The motivation of the present work is to study β − -decay properties of Z = 20 − 30 nuclei using the nuclear shell model. This paper is organized as follows. In section 2, we present the formulas for the calculation of β − decay half-lives. Shell model spaces, effective interactions and the quenching factors adopted in our calculations are reported in section 3. In section 4, we present theoretical results along w...

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βdecay rates ofr-process waiting-point nuclei in a self-consistent approach

Cited by 265 publications

References 46 publications

In-gas-cell laser spectroscopy of the magnetic dipole moment of the N≈126 isotope Pt199

In-gas-cell laser spectroscopy of the magnetic dipole moment of the N≈126 isotope Pt199

Tensor interaction in mean-field and density functional theory approaches to nuclear structure

Nuclearβ⁻-decay half-lives for ${fp}$ and ${fpg}$ shell nuclei

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βdecay rates ofr-process waiting-point nuclei in a self-consistent approach

Cited by 265 publications

References 46 publications

In-gas-cell laser spectroscopy of the magnetic dipole moment of the N≈126 isotope Pt199

In-gas-cell laser spectroscopy of the magnetic dipole moment of the N≈126 isotope Pt199

Tensor interaction in mean-field and density functional theory approaches to nuclear structure

Nuclearβ−-decay half-lives for ${fp}$ and ${fpg}$ shell nuclei

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Nuclearβ⁻-decay half-lives for ${fp}$ and ${fpg}$ shell nuclei