COLLEXCIT

"Collective excitation in the ionization of atoms, in semiconductors and biological tissues"

Coordinatore	Magyar Tudomanyos Akademia Atommagkutato Intezete    more  Organization address address: BEM TER 18/C city: DEBRECEN postcode: H4026 contact info Titolo: Dr. Nome: Zsuzsanna Cognome: Szántó Email: send email Telefono: 0036-52-509200/11223 Fax: 0036-52-416181
Nazionalità Coordinatore	Hungary [HU]
Totale costo	100˙000 €
EC contributo	100˙000 €
Programma	FP7-PEOPLE Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	FP7-PEOPLE-2007-4-3-IRG
Funding Scheme	MC-IRG
Anno di inizio	2008
Periodo (anno-mese-giorno)	2008-06-01   -   2012-05-31

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	Magyar Tudomanyos Akademia Atommagkutato Intezete  Organization address address: BEM TER 18/C city: DEBRECEN postcode: H4026 contact info Titolo: Dr. Nome: Zsuzsanna Cognome: Szántó Email: send email Telefono: 0036-52-509200/11223 Fax: 0036-52-416181	HU (DEBRECEN)	coordinator	0.00

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 Obiettivo del progetto (Objective)

'Experimental determination of ionization and decay parameters of x-ray transitions, used in analytical applications, and basic physics research. Measurements are designed to establish the size of the many-body interactions in the excitation and decay processes. In this sub-field mainly single particle approaches have been used. The experimental data contradict basic conservation laws and arithmetic. Therefore, new methodological approaches are necessary. Improved detection techniques and quality assurance capable signal processors have emerged which allow new approaches to measuring these parameters. Energetic charged particles in x-ray and gamma ray solid state detectors lose their energy mainly by plasmon creation. Plasmons are collective excitations. Using a high energy electron spectrometer we will determine the plasmon creation probability in the energy range of 200 eV to 10 keV by a high energy photoelectron spectrometer. We will develop a deconvolution method, to analyze the photoelectron spectra. We intend to study semiconductor x-ray and gamma ray detectors’ response function as a function of the band gap and plasmon energy. We plan to develop a new signal processing approach based on the obtained information. We will study various surface modification of detectors, to reduce the surface plasmon creation probability. Collective excitations are also important in biological tissues. Many radioactive materials are used in medical imaging. Delocalized plasmons excited in biological tissue by energetic particles could be transferred to nearby molecules like DNA causing radiation damage. As a pilot study, we want to study what type of plasmon excitation is possible, measure the plasmon energy and the plasmon creation efficiency.'