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
24699985 (ISSN) 24699993 (eISSN)
Vol. 85 4 044312Subject Categories
Subatomic Physics
Roots
Basic sciences
DOI
10.1103/PhysRevC.85.044312