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Published February 1, 1957 | public
Journal Article Open

Isomer in iridium-193


An 80.19-kev transition with a half-life of 11.9 days and M4 multipolarity has been observed in a neutron-irradiated sample of iridium. The corresponding isomeric state has been assigned to Ir193, which is produced by two successive neutron captures in Ir191. A pile-neutron capture cross section of 1500 barns is found for Ir192.

Additional Information

©1957 The American Physical Society. Received 31 October 1956. We wish to thank Professor J. W. M. DuMond for his interest in this work and Professor S. A. Moszkowski and Dr. E. N. Hatch for helpful discussions.


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