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New Element Hahnium, Atomic Number 105

Albert Ghiorso, Matti Nurmia, Kari Eskola, James Harris, and Pirkko Eskola
Phys. Rev. Lett. 24, 1498 – Published 29 June 1970
An article within the collection: Transuranium Elements and the Physical Review
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Abstract

An isotope of element 105 with mass number 260 has been formed by bombarding Cf249 with N15 ions. The Z and A of the nuclide have been unambiguously identified by recoilmilking the 30-second Lr256 daughter. 105260 has a (1.6±0.3)-sec half-life and decays by alpha-particle emission with groups at 9.06 (55%), 9.10 (25%), and 9.14 MeV (20%). Branching decay by spontaneous fission is less than 20%. Some comments are made on the earlier results of the Dubna group concerning a few alpha-particle events at 9.4 and 9.7 MeV which they claim to be due to element 105.

  • Received 17 April 1970

DOI:https://doi.org/10.1103/PhysRevLett.24.1498

©1970 American Physical Society

Collections

This article appears in the following collection:

Transuranium Elements and the Physical Review

This collection marks the 150th anniversary of Dmitri Mendeleev’s discovery of the Periodic Table of Elements.

Authors & Affiliations

Albert Ghiorso, Matti Nurmia, Kari Eskola*, James Harris, and Pirkko Eskola

  • Lawrence Radiation Laboratory, University of California, Berkeley, California 94720

  • *On leave of absence from Department of Physics, University of Helsinki, Helsinki, Finland.

References

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Issue

Vol. 24, Iss. 26 — 29 June 1970

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