2019
DOI: 10.1103/physrevc.100.024316
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Suddenly shortened half-lives beyond Ni78:N=50 magic number and high-energy nonunique first-forbidden transitions

Abstract: Background: β-decay rates play a decisive role in understanding the nucleosynthesis of heavy elements and are governed by microscopic nuclear-structure information. A sudden shortening of the half-lives of Ni isotopes beyond N = 50 was observed at the RIKEN-RIBF. This is considered due to the persistence of the neutron magic number N = 50 in the very neutron-rich Ni isotopes. Purpose: By systematically studying the β-decay rates and strength distributions in the neutronrich Ni isotopes around N = 50, I try to … Show more

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Cited by 15 publications
(31 citation statements)
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“…The Ca and Ni isotopes are all spherical in the ground state within the present model. The neutrons are paired in all the isotopes except 70 Ca, 56 Ni, and 78 Ni while the protons are unpaired except in 52 Ni.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…The Ca and Ni isotopes are all spherical in the ground state within the present model. The neutrons are paired in all the isotopes except 70 Ca, 56 Ni, and 78 Ni while the protons are unpaired except in 52 Ni.…”
Section: Resultsmentioning
confidence: 99%
“…One sees an onset of the low-energy state in [50][51][52][53][54][55][56] Ca. This is due to the νp 3/2 → νp 1/2 excitation.…”
Section: A Neutral Channel: IV Spin-m1 States In Ca Isotopesmentioning
confidence: 99%
“…Importance of the higher multipole spin-isospin responses beyond the allowed transitions is recognized for the weak processes in stellar environment [4,19]. The forbidden transitions are also involved at zero temperature such as the neutrinoless double β decay [6,19] if any and the single β decay of heavy neutron-rich nuclei [20][21][22][23][24][25][26]. From a nuclear structure point of view, the spin-dipole resonance (SDR) with L = 1, S = 1, T = 1 have been studied to understand the mechanism for the collectivity of a giant resonance and the spin-isospin part of the interaction in nuclear medium [1,10] besides that the Gamow-Teller and M1 resonances have been extensively studied as the IV magnetic L = 0 transitions [7].…”
Section: Introductionmentioning
confidence: 99%
“…One can see a prominent peak around E T = −12 MeV and several states with a small transition strength. The prominent state corresponds to the low-lying 1 − state appearing at −11.5 MeV in the self-consistent calculation based on the nuclear EDF method [34]; see Fig. 5(b) there.…”
Section: Low-lying Sd States In 80 Cumentioning
confidence: 96%