Spectroscopy of the proton drip-line nucleus 203Fr
Jakobsson, U., Juutinen, S., Uusitalo, J., Leino, M., Auranen, K., Enqvist, T., . . . Sorri, J. (2013). Spectroscopy of the proton drip-line nucleus 203Fr. Physical Review C, 87 (5), 054320. doi:10.1103/PhysRevC.87.054320
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© 2013 American Physical Society. Published in this repository with the kind permission of the publisher.
The nucleus 203Fr has been studied through γ -ray and electron spectroscopy, using the recoil-decay tagging
technique. A 13/2+ state, with a half-life of 0.37(5) μs, has been observed in 203Fr. Both the α-decay branch and
the internal de-excitation of the 1/2+ isomer in 203Fr have been studied. Furthermore, the corresponding 1/2+
state, with a half-life of 0.31(8) s, has been found in 199At. In addition, transitions feeding the 9/2− ground state
of 203Fr have been identified. The observed level pattern suggests that the ground state is still spherical.