1. Decay of neutron-rich Mn nuclides and deformation of heavy Fe isotopes
- Author
-
Hannawald, M., Kautzsch, T., Woehr, A., Walters, W. B., Kratz, K. -L., Fedoseyev, V. N., Mishin, V. L., Boehmer, W., Pfeiffer, B., Sebastian, V., Jading, Y., Koester, U., Lettry, J., Ravn, H. L., and Collaboration, the ISOLDE
- Subjects
Nuclear Experiment - Abstract
The use of chemically selective laser ionization combined with beta-delayed neutron counting at CERN/ISOLDE has permitted identification and half-life measurements for 623-ms Mn-61 up through 14-ms Mn-69. The measured half-lives are found to be significantly longer near N=40 than the values calculated with a QRPA shell model using ground-state deformations from the FRDM and ETFSI models. Gamma-ray singles and coincidence spectroscopy has been performed for Mn-64 and Mn-66 decays to levels of Fe-64 and Fe-66, revealing a significant drop in the energy of the first 2+ state in these nuclides that suggests an unanticipated increase in collectivity near N=40., Comment: Latex-file with 4 figures, 5 pages, Phys. Rev. Lett., in print
- Published
- 1998
- Full Text
- View/download PDF