Obiettivo The project addresses a fundamental issue of the physics of collisional processes involving charged particles, and proposes both a novel approach to interpret the dynamics on a stochastic basis, and experiments aimed at verifying the validity of the approach for a wide range of conditions. In particular, the project aims at providing a detailed understanding of electron transfer phenomena in temporary quasi-molecular systems formed in collisional events. Traditional quantum mechanical description of such systems often fails due to the complexity of calculations. The difficulties will be overcome by complementing the traditional methods by a newly developed approach, the stochastic ionisation model. This alternative approach treats the process as escape of weakly bound electron during the collision in the form of a stochastic migration along overlapping multiple ionisation channels.The basis of this novel approach has already been set thanks to the previous collaborative efforts by two of the participating teams. The project proposes to extend the approach to more complicated systems and more realistic conditions. A distinctive feature of the project is a close collaboration between theory and experiment. To this aim, up-to-date experiments will be specifically designed and carried out to verify and assess the validity of the stochastic ionisation approach. In particular, due to the increased collision times, low temperature Rydberg atom systems are ideally suited to observe dramatic modifications of the collisional ionisation behaviour. Experiments using laser-cooling and trapping technologies will be undertaken to demonstrate such effects.The project promises original and timely contributions to the detailed understanding of the collisional behaviour in the emerging, and still largely unexplored, field of low, and ultra-low temperature systems. The expected outcomes will be relevant role for predicting and controlling electron transfer in complex experimental situations. Furthermore, applications of the results can be envisioned in a large array of disciplines, ranging from astrophysical plasmas to isotope separation and applications in environmental monitoring, biophysics and chemical reaction control.The seven teams, belonging to three different INTAS countries (IT, DE, DK) and four different institutes located in Russia, share a high-level expertise and knowledge in the scientific area of the project. Collaborative links between different teams already exist, and they will be further developed within the project, through a management oriented towards a continuous and efficient collaboration and exchange of information. Up-to-date set-ups are available, which require little, or none, additional investments to be suitable for the complex tasks. Funding by INTAS will make possible an optimal and co-ordinated exploitation of the resources available in seven different laboratories towards the achievement of the scientific aims.The project is broken into three main tasks and a total of seven sub-tasks, each one oriented towards specific experimental implementations, involving collisions of Rydberg alkali atoms with atoms and molecules in thermal and supersonic beam conditions, electron detachment in low energy collisions of hydrogen negative ions, and experiments at ultra-low temperature in magneto-optical traps for neutral alkalis and group II elements. Eleven milestones are defined, for total project duration of 36 months. Original results are expected as outcomes of the project, which will be disseminated through publications in international journals and participation in international conferences. Furthermore, a web page devoted to the project will be maintained in order to ensure a timely and broad dissemination of the main results achieved. Programma(i) IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993- Argomento(i) 1B - Condensed Matter, Optics and Plasma Physics OPEN - OPEN Call Invito a presentare proposte Data not available Meccanismo di finanziamento Data not available Coordinatore Dipartimento di Fisica Contributo UE Nessun dato Indirizzo Via Filippo Buonarroti 2 56127 Pisa Italia Mostra sulla mappa Costo totale Nessun dato Partecipanti (6) Classifica in ordine alfabetico Classifica per Contributo UE Espandi tutto Riduci tutto Russian Academy of Sciences Russia Contributo UE Nessun dato Indirizzo Politekhnicheskaya 26 194021 St. Petersburg Mostra sulla mappa Costo totale Nessun dato Russian Center Russia Contributo UE Nessun dato Indirizzo Kurchatov sq.1 123182 Moscow Mostra sulla mappa Costo totale Nessun dato Saint Petersburg State University Russia Contributo UE Nessun dato Indirizzo Peterhoff, Ulianovskaya ul. 1 198904 St. Petersburg Mostra sulla mappa Costo totale Nessun dato Siberian Branch of Russian Academy of Sciences Russia Contributo UE Nessun dato Indirizzo pr. Lavrentjeva 13 630090 Novosibirsk Mostra sulla mappa Costo totale Nessun dato University of Copenhagen Danimarca Contributo UE Nessun dato Indirizzo Universitetsparken 5 2100 Copenhagen Oe Mostra sulla mappa Costo totale Nessun dato Universität Kaiserslautern Germania Contributo UE Nessun dato Indirizzo Erwin-Schroedinger Str. 67653 Kaiserslautern Mostra sulla mappa Costo totale Nessun dato
