Alpha-particle type four-body correlation in 212Po

Sasaki, Kiyoshi; Suekane, Shingo; Tonozuka, Isao

doi:10.1016/0375-9474(70)90508-7

Cited by 8 publications

(3 citation statements)

References 16 publications

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“…The effect of the proton-neutron interaction was examined in, e.g., Refs. [14,79] for 212 Po and was found to be minor due to the fact that neutrons and protons in 212 Po occupy different shells. This is no longer true in the N = Z nucleus 104 Te, in which the major enhancement of S is expected due to T = 0 correlations.…”

Section: Absolute Alpha-decay Width Of 212 Pomentioning

confidence: 91%

αdecay in the complex-energy shell model

Betán

Nazarewicz

2012

Phys. Rev. C

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Background: Alpha emission from a nucleus is a fundamental decay process in which the alpha particle formed inside the nucleus tunnels out through the potential barrier. Purpose: We describe alpha decay of 212 Po and 104 Te by means of the configuration interaction approach. Method: To compute the preformation factor and penetrability, we use the complex-energy shell model with a separable T = 1 interaction. The single-particle space is expanded in a Woods-Saxon basis that consists of bound and unbound resonant states. Special attention is paid to the treatment of the norm kernel appearing in the definition of the formation amplitude that guarantees the normalization of the channel function. Results: Without explicitly considering the alpha-cluster component in the wave function of the parent nucleus, we reproduce the experimental alpha-decay width of 212 Po and predict an upper limit of T 1/2 = 5.5 × 10 −7 sec for the half-life of 104 Te. Conclusions:The complex-energy shell model in a large valence configuration space is capable of providing a microscopic description of the alpha decay of heavy nuclei having two valence protons and two valence neutrons outside the doubly magic core. The inclusion of proton-neutron interaction between the valence nucleons is likely to shorten the predicted half-live of 104 Te.

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Section: Absolute Alpha-decay Width Of 212 Pomentioning

confidence: 91%

αdecay in the complex-energy shell model

Betán

Nazarewicz

2012

Phys. Rev. C

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“…Nevertheless, it has still been a challenging problem to understand the many-particle tunneling from a fully microscopic view. For instance, even though there have been several attempts [10,[13][14][15], alpha decays have not fully been understood microscopically with sufficient accuracy.…”

Section: Introductionmentioning

confidence: 99%

Time-dependent approach to many-particle tunneling in one dimension

et al. 2012

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Employing the time-dependent approach, we investigate a quantum tunneling decay of manyparticle systems. We apply it to a one-dimensional three-body problem with a heavy core nucleus and two valence protons. We calculate the decay width for two-proton emission from the survival probability, which well obeys the exponential decay-law after a sufficient time. The effect of the correlation between the two emitted protons is also studied by observing the time evolution of the two-particle density distribution. It is shown that the pairing correlation significantly enhances the probability for the simultaneous diproton decay.

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“…The effect of the protonneutron interaction was examined in, e.g., Refs. [14,78] for 212 Po and was found to be minor due to the fact that neutrons and protons in 212 Po occupy different shells. This is no longer true in the N = Z nucleus 104 Te, in which the major enhancement of S is expected due to T = 0 correlations.…”

Section: Comparison Between Ground-state Alpha Decay Of 212 Po Andmentioning

confidence: 97%

Alpha Decay in the Complex Energy Shell Model

Betan,

Nazarewicz

2012

Preprint

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Background: Alpha emission from a nucleus is a fundamental decay process in which the alpha particle formed inside the nucleus tunnels out through the potential barrier.Purpose: We describe alpha decay of 212 Po and 104 Te by means of the configuration interaction approach.Method: To compute the preformation factor and penetrability, we use the complex-energy shell model with a separable T =1 interaction. The single-particle space is expanded in a Woods-Saxon basis that consists of bound and unbound resonant states. Special attention is paid to the treatment of the norm kernel appearing in the definition of the formation amplitude that guarantees the normalization of the channel function.Results: Without explicitly considering the alpha-cluster component in the wave function of the parent nucleus, we reproduce the experimental alpha-decay width of 212 Po and predict an upper limit of T 1/2 = 5.5 × 10 −7 sec for the half-life of 104 Te. Conclusions:The complex-energy shell model in a large valence configuration space is capable of providing a microscopic description of the alpha decay of heavy nuclei having two valence protons and two valence neutrons outside the doubly magic core. The inclusion of proton-neutron interaction between the valence nucleons is likely to shorten the predicted half-live of 104 Te.

show abstract

Alpha-particle type four-body correlation in 212Po

Cited by 8 publications

References 16 publications

αdecay in the complex-energy shell model

αdecay in the complex-energy shell model

Time-dependent approach to many-particle tunneling in one dimension

Alpha Decay in the Complex Energy Shell Model

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