Spectroscopy around N = 20 shell closure: $\beta$–n decay study of $^{35}$Al

C. Timis (1) , J.C. Angélique (1) , A. Buta (1) , N.L. Achouri (1) , D. Baiborodin , P. Baumann (2) , C. Borcea , S. Courtin (2) , P. Dessagne (2) , Z. Dlouhy , J.M. Daugas , S. Grévy (1) , D. Guillemaud-Mueller (3) , A. Knipper (2) , F.R. Lecolley (1) , J.L. Lecouey (1) , M. Lewitowicz (4) , E. Liénard (1) , S.M. Lukyanov , F.M. Marqués (1) , C. Miehé (2) , J. Mrazek , F. Negoita , F. Nowacki (2) , F. de Oliveira (4) , N.A. Orr (1) , J. Péter (1) , S. Piétri (1) , Yu E. Penionzhkevich , E. Poirier (2) , M. Stanoiu (4) , G. Walter (2)

1 LPCC - Laboratoire de physique corpusculaire de Caen
2 IReS - Institut de Recherches Subatomiques
3 IPNO - Institut de Physique Nucléaire d'Orsay
4 GANIL - Grand Accélérateur National d'Ions Lourds

An experimental spectroscopic investigation of $^{35}$Al has been performed. The delayed neutron and $gamma$ spectra, following the $\beta$ decay of $^{35}$Al, have been measured using the delayed neutron detector array TONNERRE coupled with high efficiency $\gamma$ detectors. A detailed analysis of such spectra allows one to extract the level schemes of its daughters. These levels are compared with the few previously existing data and shell-model calculations. Based on triple $\beta$–$\gamma$–n coincidences eight new levels above the neutron separation energy in $^{34}$Si were for the first time observed.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

C. Timis, J.C. Angélique, A. Buta, N.L. Achouri, D. Baiborodin, et al.. Spectroscopy around N = 20 shell closure: $\beta$–n decay study of $^{35}$Al. International Conference on the interface between NUclear STructure, Astrophysics and Reactions - NUSTAR 2005, Jan 2005, Guildford, United Kingdom. IOP Publishing, 31, pp.S1965-S1968, 2005, ⟨10.1088/0954-3899/31/10/111⟩. ⟨in2p3-00024863⟩