Positive Identification of Two Alpha-Particle-Emitting Isotopes of Element 104

Phys. Rev. Lett. 22, 1317 – Published 16 June 1969
A. Ghiorso, M. Nurmia, J. Harris, K. Eskola, and P. Eskola


We have studied isotopes of element 104 formed by bombarding Cf249 with C12 and C13 ions. 104257 and 104259 were positively identified by milking their daughters, No253 and No255. 104257 is a 4.5-sec alpha-particle activity with a complex spectrum; 104259 is likewise an alpha emitter with a half-life of 3 sec. 104258 is tentatively identified as an 11-msec spontaneous-fission activity.

DOI: http://dx.doi.org/10.1103/PhysRevLett.22.1317

  • Received 5 May 1969
  • Published in the issue dated 16 June 1969

© 1969 The American Physical Society

Authors & Affiliations

A. Ghiorso, M. Nurmia, J. Harris, K. Eskola*, and P. Eskola

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

  • *On leave of absence from Department of Physics, University of Helsinki, Helsinki, Finland.
  • Guest Scientist supported by the National Research Council of Sciences, Helsinki, Finland.

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