Study of new isotopes in the osmium region.

• Main Author: Epp, Edward. R.
• Other Authors: Foster, J. (Supervisor)
• Format: Others
• Language: en
• Published: McGill University 1955
• Subjects: Physics.
• Online Access: http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=109879

A long-lens type beta ray spectrometer was modified by the addition of a central electron-focusing coil to the system. An increase in the transmission of the spectrometer of over a factor of five was realized with small loss in resolution. Recently observed 10 and 15 hour osmium activities produced by proton bombardment of rhenium were studied with a gamma ray spectrometer, a 28 channel kicksorter, a 180° beta ray spectrograph, and a slow coincidence assembly, as well as with the improved spectrometer. Measurement of their relative field cross sections assigned the two activities to Os183, establishing the existence of an isomeric state.