Alpha Decay and Beta-Delayed Fission: Tools for Nuclear Physics Studies

Duppen, P. Van; Andreyev, A. N.

doi:10.1007/978-3-319-74878-8_3

Cited by 7 publications

(12 citation statements)

References 161 publications

(294 reference statements)

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“…There have been long-standing experimental interest in conducting nuclear alpha decay studies which not only carry important information on nuclear structure but are also very useful even today for isotope identification via α-decay tagging [105,106,107,108,109,110,111,112,113]. Moreover, the importance of α particle capture reactions (or the inversed α-decay process) for nucleosynthesis has been investigated during a long time.…”

Section: α Decaymentioning

confidence: 99%

“…[181] with the branching ratios (energies) of 89% (4711 keV) and 11% (4880 keV). Based on those observations and on the assumption that the ground state of 105 Te has spin-parity 5/2 + , a flip between the g 7/2 and d 5/2 orbitals was suggested. This information was used in the optimization of the effective shell-model Hamiltonian for this region [188].…”

Section: α Decays Of N ∼ Z Nucleimentioning

confidence: 99%

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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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Section: α Decaymentioning

confidence: 99%

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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“…where J 00 (E) = −276(1 − 0.005E α /A α ) MeV fm 3 . A α represents the mass of the α-particle and E α symbolises the energy measured in the centre of mass of the decay fragments (α-daughter) system whose magnitude is equal to energy released for the decay process (Q α -value).…”

Section: Theoretical Frameworkmentioning

confidence: 99%

“…Thereafter, the relationship between the decay energy of α-particles and half-lives was empirically deduced by Geiger and Nuttal [1,2]. Alpha decay has been proven to be a powerful tool that incorporates nuclear structure information [3,4], such as ground-state half-life and energy [5,6], stellar nucleosynthesis [7,8], cluster decay [9], exotic nuclei in the superheavy mass region [8], closed-shell region [10,11], proton-neutron drip line region [12,13], and the shell structure [11,14].…”

Section: Introductionmentioning

confidence: 99%

Divergence in the Relativistic Mean Field Formalism: A Case Study of the Ground State Properties of the Decay Chain of 214,216,218U Isotopes

et al. 2022

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A new α-emitting has been observed experimentally for neutron deficient 214U which opens the window to theoretically investigate the ground state properties of 214,216,218U isotopes and to examine α-particle clustering around the shell closure. The decay half-lives are calculated within the preformed cluster-decay model (PCM). To obtain the α-daughter interaction potential, the RMF densities are folded with the newly developed R3Y and the well-known M3Y NN potentials for comparison. The alpha preformation probability (Pα) is calculated from the analytic formula of Deng and Zhang. The WKB approximation is employed for the calculation of the transmission probability. The individual binding energies (BE) for the participating nuclei are estimated from the relativistic mean-field (RMF) formalism and those from the finite range droplet model (FRDM) as well as WS3 mass tables. In addition to Z=84, the so-called abnormal enhancement region, i.e., 84≤Z≤90 and N<126, is normalised by an appropriately fitted neck-parameter ΔR. On the other hand, the discrepancy sets in due to the shell effect at (and around) the proton magic number Z=82 and 84, and thus a higher scaling factor ranging from 10−5–10−8 is required. Additionally, in contrast with the experimental binding energy data, large deviations of about 5–10 MeV are evident in the RMF formalism despite the use of different parameter sets. An accurate prediction of α-decay half-lives requires a Q-value that is in proximity with the experimental data. In addition, other microscopic frameworks besides RMF could be more reliable for the mass region under study. α-particle clustering is largely influenced by the shell effect.

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“…[12]. The nearly constant or even decreasing values for the most neutron-deficient polonium isotopes were explained by the configuration mixing effect [11,20].…”

mentioning

confidence: 99%