Accession Number : ADA311307

Title :   New Radioactive Isotopes for Iridium.

Corporate Author : CALIFORNIA UNIV LIVERMORE RADIATION LAB

Personal Author(s) : Chu, T. C.

PDF Url : ADA311307

Report Date : 03 MAR 1950

Pagination or Media Count : 21

Abstract : The previous work on this element, iridium, has resulted in the observation of a number of radioactive isotopes. However, on the neutron deficient side of the stable isotopes only one period has been reported. The isotope chart shows that the following mass numbers of Ir, 186, 187, 188, 189 and 190 can be produced by (a,n), (a,2n), and (a,3n) reactions on rhenium, which has two stable isotopes, Re(185) and Re(187) of relative abundance 38.2% and 61.8% respectively. Using the 60-inch cyclotron at the Crocker Laboratory, this attractive field was investigated. Enriched rhenium isotopes and spongy osmium were also used in confirmatory work concerning the reactions and the mass assignments of the products.

Descriptors :   *RADIOACTIVE ISOTOPES, *IRIDIUM, MASS, CHEMICAL REACTIONS, DEFICIENCIES, CHARTS, NUMBERS, ENRICHMENT, NEUTRONS, RHENIUM, OSMIUM, STABLE ISOTOPES.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Isotopes

Distribution Statement : APPROVED FOR PUBLIC RELEASE