<p>Investigation of the N=8 Shell Closure Through the One-Neutron Transfer <sup>20</sup>Mg(<em>d</em>, <em>p</em>) <sup>21</sup>Mg Reaction</p> <p> </p>
Abstract
1 online resource (ix, 43 pages) : colour illustrations, charts (some colour), graphs (some colour)Includes abstract.Includes bibliographical references (pages 42-43).Exotic nuclei, those characterized with a large asymmetry in their number of protons and neutrons as well as exceptionally short half-lives, are transforming our understanding of the nuclear force. The nuclear shell model predicts that isotopes with certain numbers of protons and neutrons, those corresponding to complete shells, should be more bound than other neighbouring isotopes. However, these known shell closures are showing signs of vanishing in some exotic nuclei. In this study we investigate the N = 8 shell closure at the proton drip line in the exotic Borromean nucleus 20Mg through the one neutron transfer 20Mg(d, p)21Mg reaction. This experiment was performed at the IRIS facility at TRIUMF. It was determined that the reaction populated the ground state of 21Mg, which has Jπ = 5/2+ as well as the four lowest energy excited states with excitation energy 0.206, 1.08, 1.65, and 1.99 MeV and Jπ = 1/2+, 1/2−, 3/2+, and 3/2− respectively. The fact that the Jπ = 1/2− and 3/2−excited states were populated point toward a breakdown of the N = 8 shell closure in 20Mg.</pSimilar works
Full text
Last time updated on 08/10/2025
This paper was published in Saint Mary's University, Halifax: Institutional Repository.
Having an issue?
Is data on this page outdated, violates copyrights or anything else? Report the problem now and we will take corresponding actions after reviewing your request.