Document Type

Article

Publication Date

5-2001

Publication Title

Physical review letters

Publisher

American Physical Society

Volume

86

Issue

20

First page number:

4504

Last page number:

4507

Abstract

Anion-yield spectroscopy using x rays is shown to be a selective probe of molecular core-level processes, providing unique experimental verification of shape resonances. For CO, partial anion and cation yields are presented for photon energies near the C K edge. The O- yield exhibits features above threshold related only to doubly excited states, in contrast to cation yields which also exhibit pronounced structure due to the well-known σ* shape resonance. Because the shape resonance is completely suppressed for O-, anion spectroscopy thus constitutes a highly selective probe, yielding information unobtainable with absorption or electron spectroscopy.

Keywords

Carbon monoxide; Nuclear excitation; Photoionization; X-ray spectroscopy

Disciplines

Atomic, Molecular and Optical Physics | Physical Chemistry

Language

English

Permissions

Copyright American Physical Society. Used with permission.

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