New lifetime measurements in 109 Pd and the onset of deformation at N = 60
Bucher, B., Mach, H., Aprahamian, A., Simpson, G. S., Rissanen, J., Ghiţă, D. G., Olaizola, B., Kurcewicz, W., Äystö, J., Bentley, I., Eronen, T., Fraile, L. M., Jokinen, A., Karvonen, P., Moore, I., Penttilä, H., Reponen, M., Ruchowska, E., Saastamoinen, A., . . . Weber, C. (2015). New lifetime measurements in 109 Pd and the onset of deformation at N = 60. Physical review C, 92(6), Article 064312. https://doi.org/10.1103/PhysRevC.92.064312
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Mach, H. |
Date
2015Copyright
© 2015 American Physical Society. Published in this repository with the kind permission of the publisher.
Several new subnanosecond lifetimes were measured in 109Pd using the fast-timing βγγ (t) method. Fission
fragments of the A = 109 mass chain were produced by bombarding natural uranium with 30 MeV protons at
the Jyvaskyl ¨ a Ion Guide Isotope Separator On-Line (IGISOL) facility. Lifetimes were obtained for excited states ¨
in 109Pd populated following β decay of 109Rh. The new lifetimes provide some insight into the evolution of
nuclear structure in this mass region. In particular, the distinct structure of the two low-lying 7/2+ states occurring
systematically across the Pd isotopic chain is supported by the new lifetime measurements. The available nuclear
data indicate a sudden increase in deformation at N = 60 which is related to the strong p-n interaction between
πg9/2 and νg7/2 valence nucleons expected in this region.
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American Physical SocietyISSN Search the Publication Forum
0556-2813Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/25391451
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