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Control of nuclear motion in the B 2b2 ionic state of water via an Auger resonant Raman process

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A De Fanis1, K Nobusada2, I Hjelte3, N Saito4, M Kitajima5, M Okamoto5, H Tanaka5, H Yoshida6, A Hiraya6, I Koyano7, M N Piancastelli8 and K Ueda1,9

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LETTER TO THE EDITOR

Resonant Auger spectra of H2O are recorded with unprecedented resolution, for excitation energies tuned across the O 1s→2b2 resonance. Electron emission spectra for decay to the 1b2-1 final state show a partially resolved vibrational envelope whose overall appearance is photon energy dependent. Comparison with ab initio calculations indicates that the two-dimensional nuclear motion of the Auger final state can be controlled by sampling different portions of the potential curve and changing the nuclear motion in the core-excited state.


PACS

33.80.Eh Autoionization, photoionization, and photodetachment

33.20.Tp Vibrational analysis

34.35.+a Interactions of atoms and molecules with surfaces

33.70.Jg Line and band widths, shapes, and shifts

33.20.Fb Raman and Rayleigh spectra (including optical scattering)

Subjects

Atomic and molecular physics

Dates

Issue 1 (14 January 2002)

Received 4 October 2001

Published 19 December 2001



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