Onset of collectivity in neutron deficient 196,198Po
| Autor: | Bernstein, L. A., Cizewski, J. A., Jin, H. -Q., Younes, W., Henry, R. G., Farris, L. P., Charos, A., Carpenter, M. P., Janssens, R. V. F., Khoo, T. L., Lauritsen, T., Bearden, I. G., Ye, D., Becker, J. A., Henry, E. A., Brinkman, M. J., Hughes, J. R., Kuhnert, A., Wang, T. F., Stoyer, M. A., Diamond, R. M., Stephens, F. S., Deleplanque, M. A., Macchiavelli, A. O., Lee, I. Y., Cederwall, B., Oliveira, J. R. B., Burde, J., Fallon, P., Duyar, C., Draper, J. E., Rubel, E., Vo, D. T. |
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| Rok vydání: | 1995 |
| Předmět: | |
| Zdroj: | Physical review. C, Nuclear physics, vol 52, iss 2 |
| ISSN: | 0556-2813 |
| Popis: | We have studied via in-beam $\gamma$-ray spectroscopy $^{196}$Po and $^{198}$Po, which are the first neutron-deficient Po isotopes to exhibit a collective low-lying structure. The ratios of yrast state energies and the E2 branching ratios of transitions from non-yrast to yrast states are indicative of a low-lying vibrational structure. The onset of collective motion in these isotopes can be attributed to the opening of the neutron i$_{13/2}$ orbital at N$\approx$112 and the resulting large overlap between the two valence protons in the h$_{9/2}$ orbital and the valence neutrons in the i$_{13/2}$ orbital. Comment: (accepted by Phys. Rev. C, in press) 18 pages, revtex 3.0, Five figs. available upon request |
| Databáze: | OpenAIRE |
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