Excited states of

F. Cappuzzello; S. E. A. Orrigo; A. Cunsolo; H. Lenske; M. C. Allia; D. Beaumel; S. Fortier; A. Foti; A. Lazzaro; C. Nociforo; J. S. Winfield

doi:10.1209/epl/i2003-10197-8

All issues

Volume 65 / No 6 (March 2004)

Europhys. Lett., 65 6 (2004) 766-772

Abstract

Issue		Europhys. Lett. Volume 65, Number 6, March 2004


Page(s)		766 - 772
Section		Nuclear physics
DOI		https://doi.org/10.1209/epl/i2003-10197-8
Published online		01 March 2004

Europhys. Lett., 65 (6), pp. 766-772 (2004)

Excited states of $\chem{{}^{15}C}$

F. Cappuzzello¹, S. E. A. Orrigo¹^,2, A. Cunsolo¹^,2, H. Lenske³, M. C. Allia¹^,2, D. Beaumel⁴, S. Fortier⁴, A. Foti²^,5, A. Lazzaro¹^,2, C. Nociforo¹ and J. S. Winfield¹

¹ INFN, Laboratori Nazionali del Sud - Via S. Sofia 62, 95123 Catania, Italy
² Dipartimento di Fisica e Astronomia, Università di Catania Via S. Sofia 64, 95123 Catania, Italy
³ Institut für Theoretische Physik, Universität Giessen Heinrich-Buff-Ring 16, D-35392 Giessen, Germany
⁴ Institut de Physique Nucléaire, IN2P3-CNRS - 91406 Orsay Cedex, France
⁵ INFN, Sezione di Catania - Corso Italia 57, 95129 Catania, Italy

Corresponding author: cappuzzello@lns.infn.it

Received: 27 November 2003
Accepted: 5 January 2004

Abstract

The $\chem{{}^{15}N({}^7Li,{}^7Be){}^{15}C}$ reaction at 55 $\un{MeV}$ incident energy was studied at forward angles in order to explore the $\chem{{}^{15}C}$ excitation energy spectrum. The $\chem{{}^{15}C}$ ground state and the states at $E_{\ab{x}}=0.77$ , 6.77, 7.30, 8.50 $\un{MeV}$ excitation energies were populated. The energy resolution ( $\sim 250$ $\un{keV}$ ) allowed the identification of these transitions each for $\chem{{}^7Be}$ ground and first-excited state at $E_{\ab{x}}=0.429$ $\un{MeV}$ . QRPA calculations reproduce the $\chem{{}^{15}C}$ level structure below 1.5 $\un{MeV}$ excitation energy. The strength observed at higher excitation energies probably arises from core-excited components of $\chem{{}^{15}C}$ .

PACS: 21.10.-k – Properties of nuclei; nuclear energy levels / 25.70.Kk – Charge-exchange reactions / 27.20.+n – Properties of specific nuclei listed by mass ranges: $6\leq A\leq 19$

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