Eur. Phys. J. A (2010) 46: 345-358
https://doi.org/10.1140/epja/i2010-11060-7

Regular Article - Experimental Physics

Shell model and band structures in ¹⁹O

¹ Helmholtz-Zentrum Berlin, Hahn-Meitner Platz 1, D-14109, Berlin, Germany
² Department of Physics, Faculty of Science, University of Zagreb, Bijenička 32, HR-10000, Zagreb, Croatia
³ Technische Universität München, James Frankstr. 1, D-85748, Garching, Germany
⁴ Sektion Physik der Universität München, Am Coulombwall 1, D-85748, Garching, Germany

^* e-mail: matko.milin@phy.hr

Received: 30 August 2010
Accepted: 28 October 2010
Published online: 19 November 2010

Abstract

We have studied the reaction ( ^7Li, p) on ¹³C targets at E _lab = 44 MeV, populating states in the oxygen isotope ¹⁹O . The experiments were performed at the Tandem Laboratory (Maier-Leibniz Laboratorium) using the high-resolution Q3D magnetic spectrometer. States were populated up to an excitation energy of 21MeV, with an overall energy resolution of 45keV. We discuss shell model states and cluster bands related to the rotational bands in the ¹⁸O -isotope, using the weak-coupling approach. Similar to ¹⁸O , the broken intrinsic reflection symmetry in these states must give rise to rotational bands as parity doublets, so two K = 3/2 bands (parities, + and - are proposed with large moments of inertia. These are discussed in terms of an underlying cluster structure, ( ^14C ⊗ n ⊗ ) . An extended molecular binding diagram is proposed which includes the ¹⁴C -cluster.