Structure of C-16: Testing shell model and ab initio approaches
Artikel i vetenskaplig tidskrift, 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

Författare

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

Universität zu Köln

A. Gade

Michigan State University

G. F. Grinyer

Michigan State University

S. Gros

Lawrence Berkeley National Laboratory

M. Hackstein

Universität zu Köln

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

Universität zu Köln

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, Teknisk fysik, Subatomär fysik

P. Navratil

TRIUMF

R. Roth

Technische Universität Darmstadt

Physical Review C - Nuclear Physics

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

Vol. 86 4 Art. no. 044329- 044329

Ämneskategorier

Subatomär fysik

Fysik

Fundament

Grundläggande vetenskaper

DOI

10.1103/PhysRevC.86.044329