One-neutron removal reactions on Al isotopes around the N=20 shell closure
Journal article, 2012

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.

Author

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

Chalmers, Applied Physics, Subatomic Physics

B. Kindler

R. Knöbel

R. Krücken

N. Kurz

Mattias Lantz

Chalmers, Applied Physics, Subatomic Physics

H. Lenske

Yu. A. Litvinov

B. Lommel

K. Mahata

P. Maierbeck

A. Musumarra

Thomas Nilsson

Chalmers, Applied Physics, Subatomic Physics

C. Perro

C. Scheidenberger

B. Sitar

P. Strmen

B. Sun

I. Szarka

I. Tanihata

H. Weick

M. Winkler

Physical Review C - Nuclear Physics

0556-2813 (ISSN) 1089-490X (eISSN)

Vol. 85 4

Subject Categories

Subatomic Physics

Roots

Basic sciences

DOI

10.1103/PhysRevC.85.044312

More information

Created

10/7/2017