Eur. Phys. J. A (2015) 51: 113
https://doi.org/10.1140/epja/i2015-15113-1

Regular Article - Experimental Physics

Beta-delayed proton emission from ²¹Mg

¹ Department of Physics and Astronomy, Aarhus University, DK-8000, Aarhus C, Denmark
² Instituto de Estructura de la Materia, CSIC, E-28006, Madrid, Spain
³ Department of Nuclear Physics, Lund University, SE-221 00, Lund, Sweden
⁴ Department of Fundamental Physics, Chalmers University of Technology, SE-412 96, Göteborg, Sweden
⁵ ISOLDE, PH Department, CERN, CH-1211, Geneva 23, Switzerland

^* e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Received: 11 June 2015
Revised: 11 August 2015
Accepted: 26 August 2015
Published online: 22 September 2015

Abstract

Beta-delayed proton emission from ²¹Mg has been measured at ISOLDE, CERN, with a detection setup consisting of two charged-particle telescopes surrounding the decay point. Altogether 27 βp branches were measured with center-of-mass energies between 0.4–7.2 MeV. Seven new βp branches were observed. Beta-delayed protons were used to determine the half-life of ²¹Mg as 118.6 ± 0.5 ms. From a line shape fit of the βp branches we extract the widths, spins, and parities of the resonances of ²¹Na. An improved interpretation of the decay scheme in accordance with the results obtained in reaction studies is presented.