Document Type

Article

Publication Date

2-2000

Publication Title

Physical review A

Publisher

American Physical Society

Volume

61

Issue

2

First page number:

022709-1

Last page number:

022709-5

Abstract

Vibrational-resolved ion and ion-pair yield spectra of N2 and CO taken at their 1s⃗π* resonance excitations reveal decay-channel-dependent core hole lifetimes. The linewidths of the yield spectra tend to be shortened when the number of electrons ejected in the deexcitation process increases, finally becoming narrower than the total ion yield or absorption natural lifetime width of the core-excited states of N2 and CO, respectively. In contrast to this, the linewidths of the yield spectra for the singly charged molecular ions, N2+ and CO+, are shown to be broader than their corresponding natural linewidths. This linewidth shortening and broadening observed in the ion yield spectra are explained by the effect of different internuclear distances on the lifetime of an excited molecular state.

Keywords

Auger effect; Excited state chemistry; Nuclear excitation; Time-of-flight mass spectrometry

Disciplines

Atomic, Molecular and Optical Physics | Physical Chemistry

Language

English

Permissions

Copyright American Physical Society. Used with permission.

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