Spectroscopy of proton-unbound nuclei by tracking their decay products in-flight: One- and two- proton decays of {sup 15}F, {sup 16}Ne, and {sup 19}Na

Journal Article · Mon Nov 15 04:00:00 EST 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.054315· OSTI ID:21499173

Mukha, I ^[1]; Suemmerer, K; Chatillon, A; Geissel, H; Hofmann, J; Kurz, N; Nociforo, C; Ott, W; Roeckl, E; Weick, H ^[2]; Acosta, L; Garcia-Ramos, J E; Martel, I ^[3]; Alvarez, M A. G.; Espino, J M; Gomez-Camacho, J ^[4]; Casarejos, E ^[5]; Cortina-Gil, D ^[5]; Egorova, I A ^[6]; Fomichev, A ^[7]

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1. GSI Helmholtzzentrum fuer Schwerionenforschung, D-64291 Darmstadt (Germany) and CSIC - IFIC Universidad de Valencia, E-46071 Valencia (Spain)
2. GSI Helmholtzzentrum fuer Schwerionenforschung, D-64291 Darmstadt (Germany)
3. Department of Applied Physics, Universidad de Huelva, E-21071 Huelva (Spain)
4. Universidad de Sevilla, E-41012 Seville (Spain)
5. Universidade de Santiago de Compostela, E-15782 Santiago de Compostela (Spain)
6. Bogolubov Laboratory of Theoretical Physics, JINR, RU-141980 Dubna (Russian Federation)
7. Joint Institute for Nuclear Research, RU-141980 Dubna (Russian Federation)

A powerful method of investigating proton-unbound nuclear states by tracking their decay products in flight is discussed in detail. To verify the method, four known levels in {sup 15}F, {sup 16}Ne, and {sup 19}Na were investigated by measuring the angular correlations between protons and the respective heavy-ion fragments stemming from the precursor decays in flight. The parent nuclei of interest were produced in nuclear reactions of one-neutron removal from {sup 17}Ne and {sup 20}Mg projectiles at energies of 410-450 A MeV. The trajectories of the respective decay products, {sup 14}O + p + p and {sup 18}Ne + p + p, were measured by applying a tracking technique with microstrip detectors. These data were used to reconstruct the angular correlations of the fragments, which provided information on energies and widths of the parent states. In addition for reproducing properties of known states, evidence for hitherto unknown excited states in {sup 15}F and {sup 16}Ne was found. This tracking technique has an advantage in studies of exotic nuclei beyond the proton drip line measuring the resonance energies and widths with a high precision although by using low-intensity beams and very thick targets.

• OSTI ID: 21499173
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 82; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ANGULAR CORRELATION
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BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED PARTICLES
CORRELATIONS
DAUGHTER PRODUCTS
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MILLISECONDS LIVING RADIOISOTOPES
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SODIUM 19
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