Abstract.
The neutron-deficient nucleus 68As was populated at high spin in two experiments using the reaction 40Ca(32S, 3pn) at beam energies of 105 and 95 MeV. A self-supporting and a gold-backed, highly enriched 40Ca target were used. Gamma rays were detected with the EUROBALL array, combined with the charged-particle detector array EUCLIDES and the Neutron Wall. The 68As level scheme was considerably extended, especially at negative parity and many previous spin-parity assignments were confirmed or rejected. The total-Routhian-surface (TRS) calculations find shape coexistence and γ softness for the negative- and positive-parity states, respectively.
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D. Schwalm
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Stefanova, E.A., Lieb, K.P., Stefanescu, I. et al. Observation of negative-parity high-spin states of 68As. Eur. Phys. J. A 24, 1–4 (2005). https://doi.org/10.1140/epja/i2004-10126-5
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DOI: https://doi.org/10.1140/epja/i2004-10126-5