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

Nociforo, C.; Prochazka, A.; Kanungo, R.; Aumann, T.; Boutin, D.; Cortina Gil, D.; Davids, B.; Diakaki, M.; Farinon, F.; Geissel, H.; Gernhaeuser, R.; Janik, R.; Jonson, B.; Kindler, B.; Knoebel, R.; Kruecken, R.; Kurz, N.; Lantz, M.; Lenske, H.; Litvinov, Y. u. A.; Lommel, B.; Mahata, K.; Maierbeck, P.; Musumarra, Agatino; Nilsson, T.; Perro, C.; Scheidenberger, C.; Sitar, B.; Strmen, P.; Sun, B.; Szarka, I.; Tanihata, I.; Weick, H.; Winkler, M.

doi:10.1103/PhysRevC.85.044312

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 (approximate to 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 Al-33,Al-34,Al-35 has been studied and compared with shell model predictions. The inferred 2s(1/2) neutron occupancy in the Al-33 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 Al-34, similarly to Mg-33. The single-particle 1f(7/2) occupancy shows a gradual increase at N = 22. Correspondingly, a decrease of the 1d(3/2) strength has been observed.

Titolo:	One-neutron removal reactions on Al isotopes around the N=20 shell closure
Autori interni:	Nociforo C. Prochazka A. Kanungo R. Aumann T. Boutin D. Cortina Gil D. Davids B. Diakaki M. Farinon F. Geissel H. Gernhaeuser R. Janik R. Jonson B. Kindler B. Knoebel R. Kruecken R. Kurz N. Lantz M. Lenske H. Litvinov Y.u. A. Lommel B. Mahata K. Maierbeck P. MUSUMARRA, Agatino Nilsson T. Perro C. Scheidenberger C. Sitar B. Strmen P. Sun B. Szarka I. Tanihata I. Weick H. Winkler M. mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2012
Rivista:	PHYSICAL REVIEW. C, NUCLEAR PHYSICS
Handle:	http://hdl.handle.net/20.500.11769/55180
Appare nelle tipologie:	1.1 Articolo in rivista

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http://hdl.handle.net/20.500.11769/55180

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