Abstract / Description of output
We present an experimental study of Na-19 states in the excitation energy range between 2 and 3 MeV. The presence of Na-19 single-particle levels at these energies was first predicted by a microscopic cluster model and then experimentally confirmed by measuring the elastic and inelastic scattering of a 66 MeV Ne-18 radioactive beam on a (CH2)(n) target. The H(Ne-18, p)Ne-18(g.s.) and H(Ne-18, p')Ne-18*(2(+), 1.887 MeV) cross sections have been obtained in the laboratory angular range theta(lab) = 6.1 degrees-18.4 degrees and analyzed by using the R-matrix method. Two new states in Na-19 have been observed at centre-of-mass energies E-c.m. = 2.78 +/- 0.01 MeV and 3.09 +/- 0.05 MeV. Both resonances exhibit large widths in the Ne-18(2(+)) + p channel, and low branching ratios into the elastic channel. The reduced proton widths confirm the single-particle nature of these states, with a Ne-18(2(+)) + p structure. (C) 2007 Elsevier B.V. All rights reserved.
Original language | English |
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Pages (from-to) | 864-869 |
Number of pages | 6 |
Journal | Physics Letters B |
Volume | 659 |
Issue number | 5 |
DOIs | |
Publication status | Published - 7 Feb 2008 |
Keywords / Materials (for Non-textual outputs)
- elastic scattering
- inelastic scattering
- single-particle states
- NUCLEI
- MODEL