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A: Atomphysik

A II: HV II

A II.1: Hauptvortrag

Montag, 24. März 2003, 14:30–15:00, F342

Localization and delocalization of core holes in photo excited molecules — •Svante Svensson — Dept. of Physics, Box 530, S-751 21 Uppsala, SCHWEDEN

A short review of the last thirty-five years of the fascinating story of localization of core holes in molecules will be given, with a short reference to applications in various fields of materials science. The main part of the talk will be focussed on the development during the last few years, when third generation Synchrotron Radiation facilities have opened up the possibility to study localization properties of core holes in great detail by electron and ion spectroscopy. A few topics will be covered:
–   Effects of delocalization on core ionized states of molecules
–   The symmetry No-dqpurificationNo-dq in the O1s XES spectrum of oxygene
–   The Auger Doppler effect - electron and ion spectroscopy results.
–   The Collapse of vibrational structure
–   No-dqInterference quenchingNo-dq in resonant Auger spectra of molecules
–   No-dqAtomic HolesNo-dq in resonant Auger spectra from ultra-fast dissociating molecules
–   Recent results from rare gas clusters