Beta-delayed proton emission from 20Mg

M. V. Lund; A. Andreyev; M. J. G. Borge; J. Cederkäll; H. De Witte; L. M. Fraile; H. O. U. Fynbo; P. T. Greenlees; L. J. Harkness-Brennan; A. M. Howard; M. Huyse; B. Jonson; D. S. Judson; O. S. Kirsebom; J. Konki; J. Kurcewicz; I. Lazarus; R. Lica; S. Lindberg; M. Madurga; N. Marginean; R. Marginean; I. Marroquin; C. Mihai; M. Munch; E. Nacher; A. Negret; T. Nilsson; R. D. Page; S. Pascu; A. Perea; V. Pucknell; P. Rahkila; E. Rapisarda; K. Riisager; F. Rotaru; C. Sotty; M. Stanoiu; O. Tengblad; A. Turturica; P. Van Duppen; V. Vedia; R. Wadsworth; N. Warr

doi:10.1140/epja/i2016-16304-x

2022 Impact factor 2.7

Hadrons and Nuclei

Eur. Phys. J. A (2016) 52: 304
https://doi.org/10.1140/epja/i2016-16304-x

Regular Article - Experimental Physics

Beta-delayed proton emission from ²⁰Mg

IDS Collaboration
M. V. Lund¹^*, A. Andreyev², M. J. G. Borge³^,4, J. Cederkäll⁵, H. De Witte⁶, L. M. Fraile⁷, H. O. U. Fynbo¹, P. T. Greenlees⁸^,9, L. J. Harkness-Brennan¹⁰, A. M. Howard¹, M. Huyse⁶, B. Jonson¹¹, D. S. Judson¹⁰, O. S. Kirsebom¹, J. Konki⁸^,9, J. Kurcewicz⁴, I. Lazarus¹², R. Lica⁴^,13, S. Lindberg¹¹, M. Madurga⁴, N. Marginean¹³, R. Marginean¹³, I. Marroquin³, C. Mihai¹³, M. Munch¹, E. Nacher³, A. Negret¹³, T. Nilsson¹¹, R. D. Page¹⁰, S. Pascu¹³, A. Perea³, V. Pucknell¹², P. Rahkila⁸^,9, E. Rapisarda⁴, K. Riisager¹, F. Rotaru¹³, C. Sotty⁶^,13, M. Stanoiu¹³, O. Tengblad³, A. Turturica¹³, P. Van Duppen⁶, V. Vedia⁷, R. Wadsworth² and N. Warr¹⁴

¹ Department of Physics and Astronomy, Aarhus University, DK-8000, Aarhus C, Denmark
² Department of Physics, University of York, YO10 5DD, York, N Yorkshire, UK
³ Instituto de Estructura de la Materia, CSIC, E-28006, Madrid, Spain
⁴ ISOLDE, PH Department, CERN, CH-1211, Geneva 23, Switzerland
⁵ Department of Nuclear Physics, Lund University, SE-221 00, Lund, Sweden
⁶ KU-Leuven, Instituut voor Kern- en Stralingsfysica, Celestijnenlaan 200D, B-3001, Leuven, Belgium
⁷ Facultad de Ciencias Fisicas, Universidad Complutense de Madrid, CEI Moncloa, 28040, Madrid, Spain
⁸ Helsinki Institute of Physics, University of Helsinki, P.O. Box 64, FIN-00014, Helsinki, Finland
⁹ Department of Physics, University of Jyväskylä, P.O. Box 35, FIN-40014 University of Jyväskylä, Jyväskylä, Finland
¹⁰ Department of Physics, Oliver Lodge Laboratory, University of Liverpool, L69 7ZE, Liverpool, UK
¹¹ Department of Physics, Chalmers University of Technology, SE-412 96, Göteborg, Sweden
¹² STFC Daresbury, WA4 4AD, Daresbury, Warrington, UK
¹³ “Horia Hulubei” National Institute of Physics and Nuclear Engineering, RO-077125, Magurele, Romania
¹⁴ Institut für Kernphysik, Universität zu Köln, Zülpicher Strasse 77, D-50937, Köln, Germany

^* e-mail: morten.vinther.lund@gmail.com

Received: 5 July 2016
Accepted: 31 August 2016
Published online: 4 October 2016

Abstract

Beta-delayed proton emission from ²⁰ Mg has been measured at ISOLDE, CERN, with the ISOLDE Decay Station (IDS) setup including both charged-particle and gamma-ray detection capabilities. A total of 27 delayed proton branches were measured including seven so far unobserved. An updated decay scheme, including three new resonances above the proton separation energy in ²⁰ Na and more precise resonance energies, is presented. Beta-decay feeding to two resonances above the Isobaric Analogue State (IAS) in ²⁰ Na is observed. This may allow studies of the 4032.9(2.4)keV resonance in ¹⁹ Ne through the beta decay of ²⁰ Mg, which is important for the astrophysically relevant reaction ¹⁵O(,)¹⁹Ne . Beta-delayed protons were used to obtain a more precise value for the half-life of ²⁰ Mg, 91.4(1.0)ms.