Mass-spectrometer study of the rare gases.

A stu dy of the appearance potentia ls and isotope abundance of tbe rare gases has been made \yith a Consolidated Engin eering Corp. mass spectrometer as a check on the operation of th e instrument. The res ults a re comparable to previously publi shed data. In add ition, some nell' experimental value of ionization poten tials have been obtained. Generally, good agreement of the isotope ab undance measurements with previously published values obtained on other types of in struments and with chemica]]y determined atom ic weights, indicates a minimum of discrim ination effec ts. The relati ve yalues of th e ion current s for the rare gases were obtai lled and p.lotted against th e atomic n um bel'. K 0 simple relation betwcen sensitidty and atom ic Humber is evident.