Quasi-bound low energy tail of resonance

I. Stefan, F.D.O. Santos, M.G. Pellegriti, M. Angélique, J.C. Dalouzy, F. De Grancey, M. Fadil, S. Grèvy, M. Lenhardt, M. Lewitowicz, A. Navin, L. Perrot, M.G.S. Laurent, I. Ray, O. Sorlin, C. Stodel, J.C. Thomas, G. Dumitru, A. Buta, R. BorceaF. Negoita, D. Pantelica, J.C. Angélique, E. Berthoumieux, A. Coc, J. Kiener, A. Lefebvre-Schuhl, V. Tatischeff, J.M. Daugas, O. Roig, T. Davinson, M. Stanoiu

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The ground state of particle-unbound nuclei is observed as a resonance. According to the Heisenberg's uncertainty principle, the shorter is the lifetime of the state the broader is the resonance. The Breit-Wigner formalism describes perfectly the shape of the resonance when energy-dependent partial-widths are used. In the low energy tail of a ground state resonance near the particle-emission threshold, the partial-width for the emission of a charged particle through the Coulomb barrier is drastically reduced. The fact that the proton decay is strongly hindered seems to be equivalent to the assertion that the decay of the proton is strongly delayed. In this interpretation and as an example, possible consequences are discussed in astrophysical context. Two reactions O(p,β)O and O(p,γ)(β)O are proposed as new pathways to bypass the O waiting point. Cross-sections were calculated after precise measurements of energies and widths of the proton-unbound F low lying states, obtained using the H( O,p)O reaction. These measurements were performed at SPIRAL - GANIL facility using an O post-accelerated radioactive beam. © 2007 American Institute of Physics.
Original languageEnglish
Title of host publicationPROTON EMITTING NUCLEI AND RELATED TOPICS
Subtitle of host publicationInternational Conference‐PROCON 2007
EditorsLS Ferreira, P Arumugam
Pages205-210
Number of pages6
Volume961
DOIs
Publication statusPublished - 1 Jan 2007
EventPROTON EMITTING NUCLEI AND RELATED TOPICS: International Conference‐PROCON 2007 - Lisbon, Portugal
Duration: 17 Jun 200723 Jun 2007

Publication series

NameAIP CONFERENCE PROCEEDINGS

Conference

ConferencePROTON EMITTING NUCLEI AND RELATED TOPICS: International Conference‐PROCON 2007
CountryPortugal
CityLisbon
Period17/06/0723/06/07

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