Spectroscopy Near the N=20 Shell Closure: $\beta$-n Decay Studies of $^{33}$Mg and $^{35}$Al
- Angélique, J.C.
- Timis, C.
- Piétri, S.
- Achouri, N.L.
- Baumann, P.
- Borcea, C.
- Buta, A.
- Catford, W.
- Courtin, S.
- M. Daugas, J.
- Dessagne, P.
- De Oliveira, F.
- Dlouhy, Z.
- Grévy, S.
- Guillemaud-Mueller, D.
- Hadeler, R.
- Knipper, A.
- Lecolley, F.R.
- Lecouey, J.L.
- Lewitowicz, M.
- Liénard, E.
- Miehe, C.
- Mrazek, J.
- Negoita, F.
- Nowacki, F.
- Orr, N.A.
- Penionzhkevich, Y.
- Peter, J.
- Poirier, E.
- Stanoiu, M.
- Tarasov, O.
- Walter, G.
DOIAbstract
International audienceAn experimental spectroscopic investigation of some neutron rich Mg and Al isotopes around the shell closure N=20 has been performed. The delayed neutron and $\gamma$ spectra, following the $\beta$-decay of $^{33}$Mg and $^{35}$Al have been measured using the delayed neutron detector array TONNERRE coupled with high efficiency EXOGAM clover detectors, a LEPS detector and eight low-energy neutron detectors. A detailed analysis of such spectra allows one to construct the level schemes of their daughters, $^{32,33)$Al and $^{34,35}$Si. The resulting spectroscopic information will provide stringent tests of large scale shell model calculations including np - nh excitations aimed at the understanding of the structural effec...
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