High-statistics measurement of the -delayed spectrum of 20Na

K. L. Laursen; O. S. Kirsebom; H. O. U. Fynbo; A. Jokinen; M. Madurga; K. Riisager; A. Saastamoinen; O. Tengblad; J. Äystö

doi:10.1140/epja/i2013-13079-6

2022 Impact factor 2.7

Hadrons and Nuclei

Eur. Phys. J. A (2013) 49: 79
https://doi.org/10.1140/epja/i2013-13079-6

Regular Article - Experimental Physics

High-statistics measurement of the -delayed spectrum of ²⁰Na

K. L. Laursen¹⁹⁹¹⁰^*, O. S. Kirsebom¹⁹⁹¹⁰^,a, H. O. U. Fynbo¹⁹⁹¹⁰, A. Jokinen²⁹⁹¹⁰, M. Madurga³⁹⁹¹⁰^,b, K. Riisager¹⁹⁹¹⁰, A. Saastamoinen²⁹⁹¹⁰, O. Tengblad³⁹⁹¹⁰ and J. Äystö²⁹⁹¹⁰

¹⁹⁹¹⁰ Department of Physics and Astronomy, Aarhus University, DK-8000, Aarhus C, Denmark
²⁹⁹¹⁰ Department of Physics, University of Jyväskylä, FIN-40351, Jyväskylä, Finland
³⁹⁹¹⁰ Instituto de Estructura de la Materia, CSIC, Serrano 113 bis, E-28006, Madrid, Spain

^* e-mail: klj06@phys.au.dk

Received: 12 April 2013
Revised: 31 May 2013
Accepted: 8 June 2013
Published online: 27 June 2013

Abstract

A measurement of the ²⁰Na -delayed alpha spectrum with a high-granularity setup has allowed the decay scheme to be revised on several points. Three new transitions of low intensity are found at low -particle energy. An R-matrix fit of the complete spectrum gives an improved description of the decay and indicates feeding to the broad 2⁺ -cluster state close to 9MeV.