Alpha-decay properties of Fr205,206,207,208: Identification of Frm206

B. G. Ritchie, K. S. Toth, H. K. Carter, R. L. Mlekodaj, E. H. Spejewski

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Alpha-particle and γ-ray spectral measurements were made for Fr205-208. A new α emitter (T12=0.7±0.1 sec and Eα=6.930±0.005 MeV) was observed and identified with the decay of a previously unknown isomer in Fr206. From the α particle and γ ray intensities, α decay branching ratios were deduced for Fr205-208 utilizing available information concerning the nuclides' (electron capture + positron) decay properties. Reduced widths were calculated and compared with those of neighboring nuclei. RADIOACTIVITY Fr205,206,207,208, measured Eγ, Iγ, Eα, Iα; deduced α-branching ratios; identified Frm206. Mass separation.

Original languageEnglish (US)
Pages (from-to)2342-2344
Number of pages3
JournalPhysical Review C
Issue number5
StatePublished - Jan 1 1981
Externally publishedYes


ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Ritchie, B. G., Toth, K. S., Carter, H. K., Mlekodaj, R. L., & Spejewski, E. H. (1981). Alpha-decay properties of Fr205,206,207,208: Identification of Frm206. Physical Review C, 23(5), 2342-2344.