Accession Number : AD0429438

Title :   ION DISSOCIATION IN THE DRIFT TUBE OF A TIME-OFFLIGHT MASS SPECTROMETER: IV. SPURIOUS FRAGMENT PEAKS ORIGINATING FROM NORMAL IONS HEAVIER THAN THE DISSOCIATING PARENT ION,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Hunt,W. W. ,Jr. ; Kennedy,M. J.

Report Date : DEC 1963

Pagination or Media Count : 5

Abstract : The drift tube of a time-of flight mass spectrometer can be used as the reaction chamber for kinetic studies of ion dissociation reactions. When the instrument is used in this way, interpretation of the results can be seriously affected by spurious fragment peaks that do not represent products of the ion dissociation reaction being studied. When the fixed delta method of identifying dissociation products is used, spurious fragment peaks originating from normal ions whose unretarded and shifted flight times lie between the unretarded and shifted flight times of the parent ion are particularly troublesome. The ions responsible for such peaks can, however, be identified by means of the flight-time shift equations, which can also be used to predict the retarder voltage Vrf which a particular ion will appear as a spurious fragment peak. (Author)

Descriptors :   (*IONS, DISSOCIATION), (*MASS SPECTROSCOPY, SPECTRUM ANALYZERS), INSTRUMENTATION, ELECTROMETERS, FUNCTIONS(MATHEMATICS), DETECTORS, PARTICLE BEAMS, TIME

Distribution Statement : APPROVED FOR PUBLIC RELEASE