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One-neutron removal reactions on Al isotopes around the N=20 shell closure

C. Nociforo ; A. Prochazka ; R. Kanungo ; T. Aumann ; D. Boutin ; D. Cortina-Gil ; B. Davids ; M. Diakaki ; F. Farinon ; H. Geissel ; R. Gernhäuser ; R. Janik ; Björn Jonson (Institutionen för fundamental fysik, Subatomär fysik) ; B. Kindler ; R. Knöbel ; R. Krücken ; N. Kurz ; Mattias Lantz (Institutionen för fundamental fysik, Subatomär fysik) ; H. Lenske ; Yu. A. Litvinov ; B. Lommel ; K. Mahata ; P. Maierbeck ; A. Musumarra ; Thomas Nilsson (Institutionen för fundamental fysik, Subatomär fysik) ; C. Perro ; C. Scheidenberger ; B. Sitar ; P. Strmen ; B. Sun ; I. Szarka ; I. Tanihata ; H. Weick ; M. Winkler
Physical Review C (0556-2813). Vol. 85 (2012), 4,
[Artikel, refereegranskad vetenskaplig]

The one-neutron removal cross sections of neutron-rich Al isotopes and longitudinal momentum distributions of the residues have been measured for A=33 to 36 at relativistic energies (≈900 MeV/u). The inclusive data have been interpreted within the eikonal approximation. The evolution of the single-particle occupancy in the ground state of 33,34,35Al has been studied and compared with shell model predictions. The inferred 2s1/2 neutron occupancy in the 33Al ground-state wave function is 20% to 40% lower than the predicted one. The inclusive data do not exclude the presence of intruder states. Some intruder l=1 occupancy is found in 34Al, similarly to 33Mg. The single-particle 1f7/2 occupancy shows a gradual increase at N=22. Correspondingly, a decrease of the 1d3/2 strength has been observed.

Denna post skapades 2012-04-25. Senast ändrad 2014-09-02.
CPL Pubid: 157048


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Institutioner (Chalmers)

Institutionen för fundamental fysik, Subatomär fysik (2005-2013)



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