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Dependence of two-proton radioactivity on nuclear pairing models

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Oishi, T., Kortelainen, M., & Pastore, A. (2017). Dependence of two-proton radioactivity on nuclear pairing models. Physical Review C, 96(4), Article 044327. https://doi.org/10.1103/PhysRevC.96.044327
Published in
Physical Review C
Authors
Oishi, Tomohiro |
Kortelainen, Markus |
Pastore, Alessandro
Date
2017
Copyright
© 2017 American Physical Society. Published in this repository with the kind permission of the publisher.

 
Sensitivity of two-proton emitting decay to nuclear pairing correlation is discussed within a time-dependent three-body model. We focus on the 6Be nucleus assuming α+p+p configuration, and its decay process is described as a time evolution of the three-body resonance state. For a proton-proton subsystem, a schematic density-dependent contact (SDDC) pairing model is employed. From the time-dependent calculation, we observed the exponential decay rule of a two-proton emission. It is shown that the density dependence does not play a major role in determining the decay width, which can be controlled only by the asymptotic strength of the pairing interaction. This asymptotic pairing sensitivity can be understood in terms of the dynamics of the wave function driven by the three-body Hamiltonian, by monitoring the time-dependent density distribution. With this simple SDDC pairing model, there remains an impossible trinity problem: it cannot simultaneously reproduce the empirical Q value, decay width, and the nucleon-nucleon scattering length. This problem suggests that a further sophistication of the theoretical pairing model is necessary, utilizing the two-proton radioactivity data as the reference quantities. ...
Publisher
American Physical Society
ISSN Search the Publication Forum
2469-9985
Keywords
few-body systems lifetimes widths nuclear forces proton emission
DOI
https://doi.org/10.1103/PhysRevC.96.044327
URI

http://urn.fi/URN:NBN:fi:jyu-201710304085

Publication in research information system

https://converis.jyu.fi/converis/portal/detail/Publication/27308479

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