A Study of the Raman Effect in Certain Su bstances with a New Apparatus.

This paper deals with the Raman Effect in Certain Substances with a New Apparatus@IAC

Discovery of Tantalum, Rhenium, Osmium, and Iridium Isotopes

Currently, thirty-eight tantalum, thirty-eight rhenium, thirty-nine osmium, and thirty-eight iridium, isotopes have been observed and the discovery of these isotopes is discussed here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.Comment: To be published in At. Data Nucl. Data Table

Iridium isotopes and their nuclear spins

The hyperfine structure patterns of some of the significant are lines of iridium have been photographed using as source a hollow cathode tube already described in a paper by the authors on the isotopic constitution of platinum. An examination of the hyperfine structure data of the iridium lines leads to the result that it consists of two isotopes with nuclear spins 1/2h/2 π and 3/2 h/2 π. A consideration of known facts regarding the occurrence of isotopes of different mass numbers in the various elements has led to the inference that the mass numbers of the two iridium isotopes are 191 and 193 with a relative abundance of nearly 1:2, the isotope with the higher mass number having the higher nuclear spin. © 1935 Indian Academy of Sciences