Recoil-decay tagging study of 205Fr
Jakobsson, U., Uusitalo, J., Juutinen, S., Leino, M., Enqvist, T., Greenlees, P., . . . Sorri, J. (2012). Recoil-decay tagging study of 205Fr. Physical Review C, 85 (1), 014309. doi:10.1103/PhysRevC.85.014309
Published inPhysical Review C
© 2012 American Physical Society. Published in this repository with the kind permission of the publisher.
The nucleus 205Fr has been studied through γ -ray and electron spectroscopy using the recoil-decay tagging technique. The resulting level scheme presents a spherical structure built on the 9/2− ground state and a rotational structure on top of a short-lived isomer. The isomer, with a spin and parity of 13/2+ and a half-life of 80(20) ns, de-excites by an M2 transition directly to the 9/2− ground state. Another, longer-lived, isomer, with a half-life of 1.15(4) ms, has also been found and assigned a spin and parity of 1/2+. Transitions populating and de-exciting this isomer have been observed as well.