University of Surrey

Test tubes in the lab Research in the ATI Dance Research

β-Delayed proton-decay study of 20Mg and its implications for the Ne19(p,γ)Na20 breakout reaction in X-ray bursts

Wallace, JP, Woods, PJ, Lotay, G, Alharbi, A, Banu, A, David, HM, Davinson, T, McCleskey, M, Roeder, BT, Simmons, E, Spiridon, A, Trache, L and Tribble, RE (2012) β-Delayed proton-decay study of 20Mg and its implications for the Ne19(p,γ)Na20 breakout reaction in X-ray bursts Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 712 (1-2). pp. 59-62.

Full text not available from this repository.

Abstract

Under astrophysical conditions of high temperature and density, such as for example found in X-ray bursts, breakout can occur from the hot CNO cycles into the rapid proton capture process. A key breakout route is via the sequence O15(α,γ)Ne19(p,γ)Na20. The Ne19(p,γ)Na20 reaction rate is expected to be dominated by a single resonance at 457(3) keV. The identity of the resonance has been under discussion for a long time, with J π=1 + and 3 + assignments suggested. In this study of the β-delayed proton decay of 20Mg we report a new, significantly more stringent, upper limit on the β-decay branch to this state of 0.02% with a confidence level of 90%. This makes a 1 + assignment highly unlikely and favours a 3 + assignment for which no branch is expected to be observed. The 3 + state is predicted to have a significantly higher resonance strength, and to produce a proportionately higher Ne19(p,γ)Na20 reaction rate in X-ray burst conditions. © 2012 Elsevier B.V.

Item Type: Article
Authors :
NameEmailORCID
Wallace, JPUNSPECIFIEDUNSPECIFIED
Woods, PJUNSPECIFIEDUNSPECIFIED
Lotay, Gg.lotay@surrey.ac.ukUNSPECIFIED
Alharbi, AUNSPECIFIEDUNSPECIFIED
Banu, AUNSPECIFIEDUNSPECIFIED
David, HMUNSPECIFIEDUNSPECIFIED
Davinson, TUNSPECIFIEDUNSPECIFIED
McCleskey, MUNSPECIFIEDUNSPECIFIED
Roeder, BTUNSPECIFIEDUNSPECIFIED
Simmons, EUNSPECIFIEDUNSPECIFIED
Spiridon, AUNSPECIFIEDUNSPECIFIED
Trache, LUNSPECIFIEDUNSPECIFIED
Tribble, REUNSPECIFIEDUNSPECIFIED
Date : 30 May 2012
Identification Number : https://doi.org/10.1016/j.physletb.2012.04.046
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:40
Last Modified : 17 May 2017 15:12
URI: http://epubs.surrey.ac.uk/id/eprint/840056

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800