Proposed recommended list of transactinium isotope decay data. Part 1. Half-lives (December 1980 edition)

The objective of the IAEA Coordinated Research Programme (CRP) on the Measurement and Evaluation of Transactinium Isotope Nuclear Decay Data, is to arrive at a consistent set of transactinium isotope decay data and their uncertainties (including half-lives, branching fractions and gamma-ray and alpha emission spectra) which would satisfy the requirements identified by the community of data users. Since the beginning of their activities in 1978 members of this CRP have reviewed the status of heavy isotope decay data, and have contributed to the compilation of the ''Proposed Recommended List'' presented in this report. In its present form, the enclosed list should be regarded as containing tentatively proposed values. The group recognizes that considerable expertise in the area of half-life measurement and evaluation exists within research groups not directly involved in the preparation of this list. Consequently, this group wishes to elicit as wide a range of comments and criticism as possible on this list of proposed values