Structure of 22N and the N=14 subshell
Journal article, 2011
One-neutron knockout data for N18-22 are analyzed in the eikonal approximation of the Glauber model. The role of the s-d shell and the crossing of the N = 14 neutron subshell are discussed. Of particular interest is the nucleus N-22, where the knockout data provide a sensitive experimental test for a possible halo structure of its ground state. The observation of a narrow momentum distribution of the N-21 fragments, together with an essential 1s(1/2) contribution needed to describe the observed longitudinal-momentum distribution, allow the firm conclusion that the ground state of N-22 is a well-developed nuclear halo. The results also show that the N = 14 subshell in N-22 is somewhat reduced as compared to that of O-23.
neutron-rich nuclei
knockout
halo
be-11
cross-sections
fragmentation
Author
C. Rodriguez-Tajes
D. Cortina-Gil
H. Alvarez-Pol
T. Aumann
E. Benjamim
J. Benlliure
M. J. G. Borge
M. Caamano
E. Casarejos
A. Chatillon
L. V. Chulkov
K. Eppinger
T. Faestermann
M. Gascon
H. Geissel
R. Gernhauser
Björn Jonson
Chalmers, Applied Physics, Subatomic Physics
R. Kanungo
R. Krucken
T. Kurtukian
K. Larsson
P. Maierbeck
Thomas Nilsson
Chalmers, Applied Physics, Subatomic Physics
C. Nociforo
Y. Parfenova
C. Pascual-Izarra
A. Perea
D. Perez-Loureiro
A. Prochazka
S. Schwertel
H. Simon
K. Summerer
O. Tengblad
H. Weick
M. Winkler
Mikhail Zhukov
Chalmers, Applied Physics, Subatomic Physics
Physical Review C - Nuclear Physics
24699985 (ISSN) 24699993 (eISSN)
Vol. 83 6Subject Categories
Physical Sciences
DOI
10.1103/PhysRevC.83.064313