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APS » Journals » Phys. Rev. Lett. » Volume 22 » Issue 24
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Phys. Rev. Lett. 22, 1317–1320 (1969)

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

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A. Ghiorso, M. Nurmia, J. Harris, K. Eskola*, and P. Eskola†
Lawrence Radiation Laboratory, University of California, Berkeley, California 94720

Received 5 May 1969; published in the issue dated 16 June 1969

We have studied isotopes of element 104 formed by bombarding 249Cf with 12C and 13C ions. 257104 and 259104 were positively identified by milking their daughters, 253No and 255No. 257104 is a 4.5-sec alpha-particle activity with a complex spectrum; 259104 is likewise an alpha emitter with a half-life of 3 sec. 258104 is tentatively identified as an 11-msec spontaneous-fission activity.

© 1969 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.22.1317
DOI:
10.1103/PhysRevLett.22.1317
PACS:

*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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