Issue 11, 2016

Evidence for charge transfer from hydrogen molecular ions to copper atoms in a neon–hydrogen analytical glow discharge

Abstract

Extensive investigations have been carried out in recent years on the effects of the presence of small amounts of molecular gases in analytical glow discharges (GDs) using argon as the plasma gas. Complementary studies using neon have shown that, when hydrogen is added to a neon discharge with a copper sample, the intensities of lines from most of the upper energy levels in the Cu II 3d9(2D)4p sub-configuration decrease. However, the 224.700 nm spectral line and other lines from the same upper level (3Po2) increase in intensity and this effect cannot be produced by the excitation processes normally considered. We show that asymmetric charge transfer (ACT) excitation by hydrogen molecules (H2-ACT) is the most likely explanation, the first time this process has been reported for any element in analytical GDs. We also explain why a similar effect is not observed with added nitrogen, although the ionization energies of hydrogen and nitrogen molecules are very similar.

Graphical abstract: Evidence for charge transfer from hydrogen molecular ions to copper atoms in a neon–hydrogen analytical glow discharge

Article information

Article type
Paper
Submitted
24 رمضان 1437
Accepted
19 ذو القعدة 1437
First published
19 ذو القعدة 1437

J. Anal. At. Spectrom., 2016,31, 2175-2181

Evidence for charge transfer from hydrogen molecular ions to copper atoms in a neon–hydrogen analytical glow discharge

S. Mushtaq, E. B. M. Steers, V. Hoffmann, Z. Weiss and J. C. Pickering, J. Anal. At. Spectrom., 2016, 31, 2175 DOI: 10.1039/C6JA00231E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements