Abstract:
Electromagnetic properties of the low-lying states in a 70Ge nucleus were studied through the multiple Coulomb excitation of a 70Ge beam with a natPb target. Relative γ-ray intensities were measured as a function of emission angle relative to the scattered projectile. Sixteen E2 matrix elements, including diagonal ones, for 6 low-lying states have been determined using the least-squares search code GOSIA. The expectation values 〈Q 2〉 of 01 + and 02 + states in 70Ge are compared with those in 72, 74, 76Ge. Simple mixing calculations indicate that the 02 + states in 70Ge and 72Se can be treated as deformed intruder states. It is shown that the deformed intruder becomes the ground state in 74Kr. These interpretations of the 02 + states in this region are compared with the potential-energy surface calculations by the Nilsson-Strutinsky model, which allow to interpret the experimental results in a qualitative way from the theoretical point of view.
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Received: 2 September 2002 / Accepted: 5 November 2002 / Published online: 25 February 2003
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ID="a"e-mail: sugawara@pf.it-chiba.ac.jp
Communicated by D. Schwalm
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Sugawara, M., Toh, Y., Czosnyka, T. et al. Multiple Coulomb excitation of a 70Ge beam and the interpretation of the 02 + state as a deformed intruder. Eur Phys J A 16, 409–414 (2003). https://doi.org/10.1140/epja/i2002-10110-1
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DOI: https://doi.org/10.1140/epja/i2002-10110-1