Title: Spectroscopy of narrow, high-lying, low-spin states in 20Ne
Authors: Swartz, J. A. ×
Brown, B. A.
Papka, P.
Smit, F. D.
Neveling, R.
Buthelezi, E. Z.
Foertsch, S. V.
Freer, M.
Kokalova, Tz.
Mira, J. P.
Nemulodi, F.
Orce, J. N.
Richter, W.
Steyn, G. F. #
Issue Date: 16-Mar-2015
Publisher: Published for the American Physical Society by the American Institute of Physics
Series Title: Physical Review C, Nuclear Physics vol:91 issue:3 pages:034317-1-034317-7
Article number: 034317
Abstract: The excited states of the 20Ne nucleus from the ground state to Ex = 25 MeV were investigated with the 22Ne(p,t)20Ne reaction at a beam energy of Ep = 60 MeV using the QDD magnetic spectrometer at iThemba LABS. Narrow, low-spin J π = 0+, 1−, and 2+ states have been observed for the first time at high-excitation energies in 20Ne, namely at Ex = 17.67, 18.84, 20.59, 21.16, 21.80, and 22.5 MeV. Shell-model and coupled reaction channel calculations were performed to determine the nature of the newly observed states. Candidates for T = 2 states are proposed at 3.86(5), 4.43(5) MeV and 5.07(5) MeV above the lowest 0+, T = 2 state at Ex = 16.73 MeV. Two of these T = 2 candidates appear to result from core excitations in the 0p shell. The state at Ex = 22.5 MeV, which could not be interpreted by the shell-model calculations, is a tentative candidate for the 5-α cluster state.
ISSN: 0556-2813
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
× corresponding author
# (joint) last author

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