Low-spin excitations in the 109Tc nucleus
Kurpeta, J., Urban, W., Płochocki, A., Rissanen, J., Pinston, J.A., Elomaa, V.-V., Eronen, T., Hakala, J., Jokinen, A., Kankainen, A., Moore, I., Penttilä, H., Saastamoinen, A., Weber, C., & Äystö, J. (2012). Low-spin excitations in the 109Tc nucleus. Physical Review C, 86(4), Article 044306. https://doi.org/10.1103/PhysRevC.86.044306
Julkaistu sarjassa
Physical Review CTekijät
Päivämäärä
2012Tekijänoikeudet
© 2012 American Physical Society. Published in this repository with the kind permission of the publisher.
Monoisotopic samples of 109Mo nuclei, produced in the deuteron-induced fission of 238U and separated using
the IGISOL mass separator coupled to a Penning trap, were used to perform β- and γ -coincidence spectroscopy
of 109Tc. Spin and parity 5/2+ for the ground state of 109Mo, proposed earlier, are supported in the present work.
Three new low-energy levels observed in 109Tc are interpreted as bandheads of the π3/2−[301], π5/2−[303], and
π1/2+[431] configurations, respectively. A further three levels observed around 0.4 MeV are interpreted as K =
1/2 triaxial excitations. A similar interpretation is proposed for an analogous set of three levels observed in 107Tc
in another β− decay work. The systematics of these excitations breaks down in 111Tc, most likely due to a transition
from prolate to oblate deformation. An excitation at 745.0 keV in 109Tc and 850.7 keV in 107Tc is interpreted as
the π7/2+[413] configuration. Quasiparticle-rotor model calculations support the proposed interpretations.
...
Julkaisija
American Physical SocietyISSN Hae Julkaisufoorumista
0556-2813Asiasanat
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https://converis.jyu.fi/converis/portal/detail/Publication/22303021
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