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Details of Grant 

EPSRC Reference: GR/M77246/01
Title: COLLISIONAL PROCESSES IN THE GAS-PHASE AT EXTREMELY LOW TEMPERATURES
Principal Investigator: Sims, Professor IR
Other Investigators:
Smith, Professor I
Researcher Co-Investigators:
Project Partners:
Department: School of Chemistry
Organisation: University of Birmingham
Scheme: Standard Research (Pre-FEC)
Starts: 01 October 1999 Ends: 31 March 2004 Value (£): 322,057
EPSRC Research Topic Classifications:
Gas & Solution Phase Reactions
EPSRC Industrial Sector Classifications:
Chemicals Environment
No relevance to Underpinning Sectors
Related Grants:
Panel History:  
Summary on Grant Application Form
Collisional processes occurring at extremely low temperatures are of fundamental importance, and of relevance to physico-chemical models of dense interstellar clouds and planetary atmospheres. Experiments using laser-induced fluorescence (LIF) detection are restricted in their application, and do not, in general, yield information about absolute concentrations. Instead, we propose to detect species in the ultra-cold CRESU flow by infrared tuneable diode laser adsorption spectroscopy (IR-TDLAS). This should enable us to open up three new areas hitherto closed to study using LIF. The determination of product branching ratios at low temperatures, will not only be of fundamental interest, as no such measurements have been made below 200 K, but will also provide vital information for models of low temperatures gas-phase environments. The study of the kinetics of formation of weakly bound species, such as dimers bound by van der Waals forces, or hydrogen bonds, will be our second target. Such processes represent the first stages of condensation, and yet are very poorly understood. Finally, we intend to use IR-TDLAS detection to study rotational energy transfer in species of astrophysical importance such as CO and ammonia, where rotational energy transfer is especially important in view of their use as astrophysical molecular thermometers.
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Organisation Website: http://www.bham.ac.uk