Decay properties of Yb153 and Tm153; Excitation energies of the s1/2 and h11/2 proton states in Tm153

M. O. Kortelahti, K. S. Toth, K. S. Vierinen, J. M. Nitschke, P. A. Wilmarth, R. B. Firestone, R. M. Chasteler, A. A. Shihab-Eldin

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16 Scopus citations

Abstract

The decay properties of Yb153 and Tm153, produced in Zn64 bombardments of Mo92, were investigated following on-line mass separation. A decay scheme, incorporating 34 transitions and 25 levels in Tm153, was constructed for Yb153. It establishes the s1/2 proton level in Tm153 to be isomeric at an excitation energy of 43.2 keV. The ±-decay branch of the h11/2 Tm153 ground state was determined to be 91±3%. In addition, a partial decay scheme was put together for the 9% + branch. About 66% of this + decay proceeds to the h9/2 neutron state located at 299.3 keV in Er153. Only one transition, 266.5 keV, could be assigned to the + decay of the Tm153 s1/2 isomer; it is suggested that the ray deexcites the p3/2 neutron level to the f7/2 Er153 ground state. Based on the intensity of this 266.5-keV ray, the isomers ± branch was estimated to be 1/493%.

Original languageEnglish (US)
Pages (from-to)636-644
Number of pages9
JournalPhysical Review C
Volume39
Issue number2
DOIs
StatePublished - Jan 1 1989

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Kortelahti, M. O., Toth, K. S., Vierinen, K. S., Nitschke, J. M., Wilmarth, P. A., Firestone, R. B., Chasteler, R. M., & Shihab-Eldin, A. A. (1989). Decay properties of Yb153 and Tm153; Excitation energies of the s1/2 and h11/2 proton states in Tm153. Physical Review C, 39(2), 636-644. https://doi.org/10.1103/PhysRevC.39.636