Microscopic Theory of the Two-Proton Radioactivity

Rotureau, J.; Okołowicz, J.; Płoszajczak, M.

doi:10.1103/physrevlett.95.042503

Cited by 66 publications

(111 citation statements)

References 13 publications

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“…It has been considered now that the actual 2p-decays are often much more complicated than the simple diproton decays which Goldansky originally proposed [39][40][41][42][43][44][45][46][47]. Moreover, it has not been completely clarified whether the diproton correlation can be actually probed by observing 2p-decays.…”

Section: Introductionmentioning

confidence: 99%

Role of diproton correlation in two-proton-emission decay of theBe6nucleus

2014

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We discuss a role of diproton correlation in two-proton emission from the ground state of a proton-rich nucleus, 6 Be. Assuming the three-body structure of α + p + p configuration, we develop a time-dependent approach, in which the two-proton emission is described as a time-evolution of a three-body metastable state. With this method, the dynamics of the two-proton emission can be intuitively discussed by monitoring the time-dependence of the two-particle density distribution. With a model Hamiltonian which well reproduces the experimental two-proton decay width, we show that a strongly correlated diproton emission is a dominant process in the early stage of the two-proton emission. When the diproton correlation is absent, the sequential two-proton emission competes with the diproton emission, and the decay width is underestimated. These results suggest that the two-proton emission decays provide a good opportunity to probe the diproton correlation in proton-rich nuclei beyond the proton drip-line.

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Section: Introductionmentioning

confidence: 99%

Role of diproton correlation in two-proton-emission decay of theBe6nucleus

2014

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“…This transition to the final state can be realized in many ways, such as the sequential two-body decay via an intermediate resonance, the virtual sequential two-body decay via the correlated continuum of an intermediate nucleus, the direct decay into the three-particle continuum or its particular diproton (' 2 He') limit of two sequential two-body emissions. Different types of theoretical approaches exist which focus on the three-body decay width: the extended R-matrix theory [28,29], the real-energy continuum shell model (the so-called Shell Model Embedded in the Continuum (SMEC) [30,31,32,33,34]) describing sequential two-body emission, virtual sequential two-body emission and diproton emission via two sequential two-body emissions [33,34], the Gamow Shell Model (GSM) with no separation between two-and three-body decays from the multiparticle continuum [35], the three-body models with outgoing flux describing direct decay into the continuum [36], the three-body models combined with complex coordinate scaling [37], or the Faddeev equations combined with either outgoing flux or complex scaling [38].…”

Section: Introductionmentioning

confidence: 99%

Two-proton radioactivity

2008

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Abstract.In the first part of this review, experimental results which lead to the discovery of two-proton radioactivity are examined. Beyond two-proton emission from nuclear ground states, we also discuss experimental studies of two-proton emission from excited states populated either by nuclear β decay or by inelastic reactions. In the second part, we review the modern theory of two-proton radioactivity. An outlook to future experimental studies and theoretical developments will conclude this review.

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“…Examples of these attempts are the Shell Model Embedded in the Continuum (SMEC) [29][30][31] and the Gamow Shell Model (GSM) [32][33][34][35]. The SMEC is a recent realization of the real-energy Continuum Shell Model [36,37] which uses the Feshbach projection technique [38] in order to take into account the coupling to the scattering continuum.…”

Section: Introductionmentioning

confidence: 99%

Ab initiono-core Gamow shell model calculations with realistic interactions

et al. 2013

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No-Core Gamow Shell Model (NCGSM) is applied for the first time to study selected well-bound and unbound states of helium isotopes. This model is formulated on the complex energy plane and, by using a complete Berggren ensemble, treats bound, resonant, and scattering states on equal footing. We use the Density Matrix Renormalization Group method to solve the manybody Schrödinger equation. To test the validity of our approach, we benchmarked the NCGSM results against Faddeev and Faddeev-Yakubovsky exact calculations for 3 H and 4 He nuclei. We also performed ab initio NCGSM calculations for the unstable nucleus 5 He and determined the ground state energy and decay width, starting from a realistic N 3 LO chiral interaction.

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Microscopic Theory of the Two-Proton Radioactivity

Abstract: We formulate a theory of the two-proton radioactivity based on the real-energy continuum shell model. This microscopic approach is applied to describe the two-proton decay of the 1(-)(2) state in 18Ne.

Cited by 66 publications

References 13 publications

Role of diproton correlation in two-proton-emission decay of theBe6nucleus

Role of diproton correlation in two-proton-emission decay of theBe6nucleus

Two-proton radioactivity

Ab initiono-core Gamow shell model calculations with realistic interactions

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