Alpha decay as a probe for the structure of neutron-deficient nuclei

Qi, Chong

doi:10.1016/j.revip.2016.05.001

Cited by 40 publications

(27 citation statements)

References 161 publications

(207 reference statements)

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“…The value for 165 Pt is slightly lower than values determined for its heavier odd-A isotopes but appears to follow the trends of reducing decay widths with decreasing neutron number observed in lighter elements [22]. A similar trend has been identified above the N = 126 neutron shell closure and the Z = 82 shell closure and been attributed to reducing α-particle preformation probabilities [23,24]. When approaching shell closures, the α-particle preformation probability reduces due to there being fewer valence protons and neutrons, while further away from the shell closures nuclei are more deformed and α decays may therefore be faster [25][26][27].…”

Section: Discussionsupporting

confidence: 50%

α -spectroscopy studies of the new nuclides Pt165 and Hg170

Hilton¹,

Uusitalo²,

Sarén³

et al. 2019

Phys. Rev. C

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The new nuclides 165 Pt and 170 Hg were produced in the reactions 92 Mo(78 Kr, 5n) and 96 Ru(78 Kr, 4n) at bombarding energies of 418 MeV and 390 MeV, respectively. For 170 Hg an α-particle energy of E α = 7590(30) keV and half-life of t 1/2 = 0.08 +0.40 −0.04 ms were deduced, while for 165 Pt the corresponding values were 7272(14) keV and 0.26 +0.26 −0.09 ms. Comparison of the reduced α-decay widths with systematics indicates that both α decays are unhindered. Although combining the measured α-decay Q values with extrapolated masses suggests that both new nuclides are unbound to two-proton emission by more than 1 MeV, their α-decay half-lives are too short for this decay mode to compete. Improved data were also obtained for 166,167 Pt, produced via the 96 Ru(78 Kr, α4n) and 96 Ru(78 Kr, α3n) reactions at bombarding energies of 390 MeV and 418 MeV.

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Section: Discussionsupporting

confidence: 50%

α -spectroscopy studies of the new nuclides Pt165 and Hg170

Hilton¹,

Uusitalo²,

Sarén³

et al. 2019

Phys. Rev. C

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“…As we have seen, in heavy nuclei the neutron-neutron and proton-proton interaction, when treated properly, induce the nn and pp clustering [133]. Yet the decay width evaluated by including many configurations [182]. The new data on 108 Xe from Ref.…”

Section: α Decays Of N ∼ Z Nucleimentioning

confidence: 99%

Recent developments in radioactive charged-particle emissions and related phenomena

Liotta

Wyss

2019

Progress in Particle and Nuclear Physics

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The advent and intensive use of new detector technologies as well as radioactive ion beam facilities have opened up possibilities to investigate alpha, proton and cluster decays of highly unstable nuclei. This article provides a review of the current status of our understanding of clustering and the corresponding radioactive particle decay process in atomic nuclei. We put alpha decay in the context of charged-particle emissions which also include one-and two-proton emissions as well as heavy cluster decay. The experimental as well as the theoretical advances achieved recently in these fields are presented. Emphasis is given to the recent discoveries of charged-particle decays from proton-rich nuclei around the proton drip line. Those decay measurements have shown to provide an important probe for studying the structure of the nuclei involved. Developments on the theoretical side in nuclear many-body theories and supercomputing facilities have also made substantial progress, enabling one to study the nuclear clusterization and decays within a microscopic and consistent framework. We report on properties induced by the nuclear interaction acting in the nuclear medium, like the pairing interaction, which have been uncovered by studying the microscopic structure of clusters. The competition between cluster formations as compared to the corresponding alpha-particle formation are included. In the review we also describe the search for super-heavy nuclei connected by chains of alpha and other radioactive particle decays.

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“…Nevertheless, we rarely know formation and movement of α particle inside the parent nuclei, as a result of the complicated structure of the quantum manybody systems. Therefore, there are a few works [15][16][17][18] studying α preformation probabilities from the viewpoint of microscopic theory. Phenomenologically, α preforma-tion probabilities are obtained by the ratios of theoretical calculations without considering the preformation factors to experimental half-lives [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Systematic study of unfavored $\mathcalα$ decay half-lives of closed shell nuclei related to ground and isomeric states

Deng,

Zhao,

Xiang

et al. 2019

Preprint

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Alpha decay as a probe for the structure of neutron-deficient nuclei

Cited by 40 publications

References 161 publications

α -spectroscopy studies of the new nuclides Pt165 and Hg170

α -spectroscopy studies of the new nuclides Pt165 and Hg170

Recent developments in radioactive charged-particle emissions and related phenomena

Systematic study of unfavored $\mathcalα$ decay half-lives of closed shell nuclei related to ground and isomeric states

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