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Photoion-electron angular correlation spectroscopy: a new approach to molecular ionisation and molecular dynamics

Project information

Grant agreement ID: INTAS-1997-00471

  • Start date

    1 April 2000

  • End date

    31 March 2003

Funded under:

IC-INTAS

Coordinated by:

University of Nottingham

United Kingdom

Objective

It is planned to develop a new experimental coincidence technique to measure the angular correlation between the velocity vectors of electrons and fragment ions in molecular photoionization. As a result, the most detailed quantum mechanical information on photoionization and photodissotiation processes of molecules will be obtained for the first time. In other words, the complete quantum-mechanical photoionization experiment will be realized. Simultaneously the theoretical description of these processes will be developed, both by deriving the analytical equations for angular correlations and by performing numerical calculations for diatomic and polyatomic molecules.
The technical part of work includes construction of new position sensitive detectors with higher stability, development of computer programs for data analysis data arrays during the experiment and transformation of many dimensional experimental data arrays to initial vector correlation information, testing of the newly developed set-ups with laboratory ion sources and final experiments on synchrotron radiation sources.
Theoretical research includes development of a new technique for the description of angular correlations of molecular fragments by using bipolar spherical harmonics, calculations using MSXalpha method for polyatomic molecules, further developement of the new program for calculations of photoionization of diatomic molecules including many-electron correlations in the random phase approximation for heteronuclear molecules, creation of a new Hartree-Fock program for polyatomic molecules, and calculations of the angular distributions of photoelectrons and photoions for simple molecules being investigated experimentally, in particular, CO, O2, N2, PF3, and some others. As a result, the most detailed information on the structure of molecules and on the photoionization dynamics will be obtained, including the investigations of the nature of autoionization and shape resonances. The ability of the existing theories to describe these complicated processes will be also verified.
The results of our research will be published in international journals, presented at international and national conferences and seminars, on Internet pages, and in tne reports to be sent to INTAS.

Coordinator

University of Nottingham

Address

University Park
Ng7 2rd Nottingham

United Kingdom

Participants (5)

Centre National de la Recherche Scientifique

France

Fritz-Haber-Institut der Max-Plank-Gesellschaft

Germany

St.-Petersburg State University of Aerocosmic Instrumentation

Russia

St.Petersburg State University

Russia

Universite Paris Sud

France

Project information

Grant agreement ID: INTAS-1997-00471

  • Start date

    1 April 2000

  • End date

    31 March 2003

Funded under:

IC-INTAS

Coordinated by:

University of Nottingham

United Kingdom