J.D. Allen

A new electron spectrometer design:II

Abstract A novel charged particle energy analyzer of simple geometry is described. Expressions for the potential distribution and electric field components defined by the geometry are given. A raytrace program using these components is discussed and results of its application are presented in graphical and tabular form. Also presented are experimental results for two versions of the analyzer in the form of representative spectra of well known species (Ar + , H 2 + , O 2 + ). Finally, a comparison of the new instrument with the well known cylindrical mirror analyzer is outlined which suggests the superiority of the new instrument under the specific conditions given.

The photoelectron spectra of some gaseous thallium(I) oxyanion salts

Abstract The HeI photoelectron spectra of the gaseous forms of TlBO 2 , TlNO 3 , Tl 2 SO 4 , and TlReO 4 have been obtained using a cylindrical mirror electron spectrometer equipped with an internally-located, resistance-heated sample oven. The spectral peaks due to Tl 6 s electrons and those due to the oxyanions have been assigned molecular-orbital origins by use of MO calculations, comparisons with X-ray photoelectron and X-ray emission data, electron diffraction experiments, and mass spectrometric information.

The photoelectron spectra of gaseous alkali perrhenates

Abstract The HeI photoelectron spectra of the gaseous alkali perrhenates have been obtained using a high-temperature cylindrical mirror electron spectrometer equipped with an internally located, resistance-heated sample oven. The ionization energies have been assigned molecular-orbital origins using MO calculations and comparisons with X-ray photoelectron data, UV-visible electronic spectra, and electron diffraction experiments.

Photoelectron spectroscopic characterization of vapors over heated alkali metaborate solids

Abstract The He(I) photoelectron spectra of the gaseous metaborates of K, Rb, and Cs have been obtained using a modified high-temperature cylindrical-mirror electron spectrometer equipped with a resistance-heated sample oven. Attempts to acquire data for LiBO 2 and NaBO 2 were unsuccessful because of the high temperature required for volatilization (on the order of 1300–1400 K). The identities of the vapor-phase molecules were based on mass spectrometric and electron diffraction data. Spectral lines were assigned molecular-orbital origins through the use of MO calculations and by analogy with other compounds of similar type.

The photoelectron spectroscopic characterization of vapors above heated alkali tetrafluoroaluminates, alkali tetrachloroaluminates, and ammonium tetrachloroaluminate

Abstract The high-temperature He(I) photoelectron spectra of gas-phase alkali tetrafluoroaluminates, alkali tetrachloroaluminates, and ammonium tetrachloroaluminate have been obtained. The identities of the vapor-phase entities were assigned from data derived by electron diffraction, mass spectrometry, and matrix-isolation and vapor infrared spectroscopies. The ionization energies observed in the spectra have been assigned molecular-orbital origins through the use of theoretical calculations and comparisons with analogous compounds.

The He(I) photoelectron spectra of gaseous alkali metaphosphates

Abstract The He(I) photoelectron spectra of the gaseous metaphosphates of Na, K, Rb, and Cs have been obtained using a modified high-temperature cylindrical-mirror electron spectrometer equipped with a resistance-heated sample oven. Attempts to acquire data for LiPO 3 have been unsuccessful because of the extremely high temperature required, of the order of 1400 K. The identities of the vapor-phase molecules were based on mass spectrometric data and the spectral lines were assigned molecular orbital origins through the use of MO calculations and analogies to other ionic compounds of similar types, particularly the alkali nitrates.