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Simple approach to two-proton emission
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics. (Alba Nova University Center)
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics. (Alba Nova University Center)
2013 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 87, no 3, 034328- p.Article in journal (Refereed) Published
Abstract [en]

The two-proton decay process is studied by using a simple approach within the framework of scattering theory. We assume that the decaying nucleus is in a pairing state and, therefore, the two-particle wave function on the nuclear surface corresponds to the two protons moving in time-reversed states. This allows us to sustain a simplified version of the decay where the protons are simultaneously emitted with the same energies. We thus obtain a coupled system of radial equations with outgoing boundary conditions. We use similar proton-proton interactions to solve BCS equations and to describe external two-proton dynamics. A strong dependence of the pairing gap and decay width upon the proton-proton interaction strength is revealed. The experimental half-lives of Fe-45 and Ni-48 are reproduced by using a realistic proton-proton interaction.

Place, publisher, year, edition, pages
2013. Vol. 87, no 3, 034328- p.
Keyword [en]
Radioactivity, Proton, Nuclei, Decay
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-121468DOI: 10.1103/PhysRevC.87.034328ISI: 000316795600001ScopusID: 2-s2.0-84875988372OAI: diva2:619088
Swedish Research Council

QC 20130502

Available from: 2013-05-02 Created: 2013-04-29 Last updated: 2013-05-02Bibliographically approved

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Liotta, Roberto J.Wyss, Ramon
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