Electron capture and β+ decay of Tm147

K. S. Toth, D. C. Sousa, P. A. Wilmarth, J. M. Nitschke, K. S. Vierinen

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With the use of an on-line mass separator, electron capture (EC) and β+ decay of the direct proton emitter Tm147 was identified in a series of Ni58+92Mo irradiations. Characteristic Er Kα x rays and an 80.9-keV γ ray were observed to decay with the half-life of Tm147. The 80.9-keV γ ray is proposed to be the transition connecting the first-excited (d3/2) and ground (s1/2) neutron-hole states in Er147. The Tm147 (EC+β+)-decay strength was deduced from K x-ray and annihilation radiation intensities. A comparison of this strength with the intensity of the 1.045-MeV proton peak leads to a Tm147 direct-proton-decay branch of 15(5)%.

Original languageEnglish (US)
Pages (from-to)1804-1806
Number of pages3
JournalPhysical Review C
Issue number4
StatePublished - Jan 1 1993

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Toth, K. S., Sousa, D. C., Wilmarth, P. A., Nitschke, J. M., & Vierinen, K. S. (1993). Electron capture and β+ decay of Tm147. Physical Review C, 47(4), 1804-1806. https://doi.org/10.1103/PhysRevC.47.1804