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 00:00:00 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, Vol. 82, Issue 5; Other Information: DOI: 10.1103/PhysRevC.82.054315; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR CORRELATION
DAUGHTER PRODUCTS
EXCITED STATES
FLUORINE 15
HEAVY IONS
MAGNESIUM 20
MEV RANGE 100-1000
NEON 16
NEON 17
NEON 18
NEUTRONS
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
OXYGEN 14
PROTON-EMISSION DECAY
RESONANCE
SODIUM 19
ALKALINE EARTH ISOTOPES
BARYONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED PARTICLES
CORRELATIONS
DECAY
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FERMIONS
FLUORINE ISOTOPES
HADRONS
IONS
ISOTOPES
LIGHT NUCLEI
MAGNESIUM ISOTOPES
MEV RANGE
MILLISECONDS LIVING RADIOISOTOPES
MINUTES LIVING RADIOISOTOPES
NEON ISOTOPES
NUCLEAR DECAY
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
OXYGEN ISOTOPES
PROTON DECAY RADIOISOTOPES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SODIUM ISOTOPES