CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Structure of C-16: Testing shell model and ab initio approaches

M. Petri ; S. Paschalis ; R. M. Clark ; P. Fallon ; A. O. Macchiavelli ; K. Starosta ; T. Baugher ; D. Bazin ; L. Cartegni ; H. L. Crawford ; M. Cromaz ; U. D. Pramanik ; G. de Angelis ; A. Dewald ; A. Gade ; G. F. Grinyer ; S. Gros ; M. Hackstein ; H. B. Jeppesen ; I. Y. Lee ; S. McDaniel ; D. Miller ; M. M. Rajabali ; A. Ratkiewicz ; W. Rother ; P. Voss ; K. A. Walsh ; D. Weisshaar ; M. Wiedeking ; B. A. Brown ; Christian Forssén (Institutionen för fundamental fysik, Subatomär fysik) ; P. Navratil ; R. Roth
Physical Review C (0556-2813). Vol. 86 (2012), 4, p. Art. no. 044329.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: lifetime measurements, nuclei, beams, states, tool

Denna post skapades 2012-11-29. Senast ändrad 2016-08-18.
CPL Pubid: 166899


Läs direkt!

Lokal fulltext (fritt tillgänglig)

Länk till annan sajt (kan kräva inloggning)

Institutioner (Chalmers)

Institutionen för fundamental fysik, Subatomär fysik (2005-2013)



Chalmers infrastruktur