Very high rotational frequencies and band termination in 73Br

Details Very high rotational frequencies and band termination in 73Br Very high rotational frequencies and band termination in 73Br

2000-02-24

arxiv.org/abs/nucl-ex/0002013v1

Phys.Rev. C62 (2000) 014313

Physics

Nuclear Physics

Nuclear Experiment

6 pages, 6 figures, submitted to Phys. Rev. C as a Rapid Communication

Scientific paper

10.1103/PhysRevC.62.014313

Rotational bands in 73Br have been investigated up to spins of 65/2 using the EUROBALL III spectrometer. One of the negative-parity bands displays the highest rotational frequency 1.85 MeV reported to date in nuclei with mass number greater than 25. At high frequencies, the experimental dynamic moment of inertia for all bands decrease to very low values, indicating a loss of collectivity. The bands are described in the configuration-dependent cranked Nilsson-Strutinsky model. The calculations indicate that one of the negative-parity bands is observed up to its terminating single-particle state at spin 63/2. This result establishes the first band termination case in the A = 70 mass region.

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