Coupling an electrospray source and a solids probe/chemical ionization source to a selected ion flow tube apparatus
Abstract
A new ion source region has been constructed and attached to a variable temperature selected ion flow tube. The source features the capabilities of electron impact, chemical ionization, a solids probe, and electrospray ionization. The performance of the instrument is demonstrated through a series of reactions from ions created in each of the new source regions. The chemical ionization source is able to create H3O+, but not as efficiently as similar sources with larger apertures. The ability of this source to support a solids probe, however, greatly expands our capabilities. A variety of rhenium cations and dications are created from the solids probe in sufficient abundance to study in the flow tube. The reaction of Re+ with O2 proceeds with a rate constant that agrees with the literature measurements, while the reaction of Re22+ is found to charge transfer with O2 at about 60% of the collision rate; we have also performed calculations that support the charge transfer pathway. The electrospray source is used to create Ba+, which is reacted with N2O to create BaO+, and we find a rate constant that agrees with the literature.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 01, 2015
- Source ID
- 10.1063/1.4927716
Entities
People
- Albert A Viggiano
- Christopher R. Taormina
- Joshua J Melko
- Nicholas S Shuman
- Randall E. Pedder
- Shaun G Ard
Organizations
- Air Force Office of Scientific Research
- Air Force Research Laboratory