Structure of C-16: Testing shell model and ab initio approaches
Journal article, 2012
Excited states in C-16 were populated via the Be-9(N-17,C-16+gamma)X one-proton knockout reaction. The lifetime of the 2(1)(+) state in C-16 was measured using the recoil distance method. The extracted lifetime of tau(+)(21) = 11.4(-0.9)(+0.8)(stat) +/- 0.7(syst(B rho))(-1.5)(+0.0)(syst(feeding)) ps yields a deduced B(E2;2(1)(+) -> 0(1)(+)) = 4.21(-0.26)(+0.34)(stat)(-0.24)(+0.28)(syst(B rho))(-0.00)(+0.64)(syst(feeding)) e(2)fm(4) value in good agreement with a previous measurement. The one-proton knockout cross section is used to extract the proton amplitude of the C-16 2(1)(+) state, which confirms the neutron dominant character of this state. Gamma-ray branching ratios between the 2(2)(+) state and the 2(1)(+) and ground states were also determined. The results are compared with p-sd shell model and no-core shell model (with NN and NN + NNN) calculations. The inclusion of three-body forces are essential in order for the no-core shell model calculations to reproduce the experimental findings on the gamma-ray branching ratios.
states
nuclei
beams
lifetime measurements
tool
Author
M. Petri
Technische Universität Darmstadt
Lawrence Berkeley National Laboratory
S. Paschalis
Technische Universität Darmstadt
Lawrence Berkeley National Laboratory
R. M. Clark
Lawrence Berkeley National Laboratory
P. Fallon
Lawrence Berkeley National Laboratory
A. O. Macchiavelli
Lawrence Berkeley National Laboratory
K. Starosta
Simon Fraser University
Michigan State University
T. Baugher
Michigan State University
D. Bazin
Michigan State University
L. Cartegni
University of Tennessee
H. L. Crawford
Michigan State University
M. Cromaz
Lawrence Berkeley National Laboratory
U. D. Pramanik
Saha Institute of Nuclear Physics
G. de Angelis
Laboratori Nazionali di Legnaro
A. Dewald
University of Cologne
A. Gade
Michigan State University
G. F. Grinyer
Michigan State University
S. Gros
Lawrence Berkeley National Laboratory
M. Hackstein
University of Cologne
H. B. Jeppesen
Lawrence Berkeley National Laboratory
I. Y. Lee
Lawrence Berkeley National Laboratory
S. McDaniel
Michigan State University
D. Miller
Michigan State University
M. Rajabali
University of Tennessee
A. Ratkiewicz
Michigan State University
W. Rother
University of Cologne
P. Voss
Michigan State University
K. A. Walsh
Michigan State University
D. Weisshaar
Michigan State University
M. Wiedeking
Lawrence Livermore National Laboratory
Ithemba Laboratory for Accelerator-Based Sciences
B. A. Brown
Michigan State University
Christian Forssen
Chalmers, Applied Physics, Subatomic Physics
P. Navratil
TRIUMF
R. Roth
Technische Universität Darmstadt
Physical Review C - Nuclear Physics
24699985 (ISSN) 24699993 (eISSN)
Vol. 86 4 Art. no. 044329- 044329Subject Categories
Subatomic Physics
Physical Sciences
Roots
Basic sciences
DOI
10.1103/PhysRevC.86.044329