dc.creator Ball, C. D. en_US dc.creator De Lucia, Frank C. en_US dc.date.accessioned 2006-06-15T19:03:43Z dc.date.available 2006-06-15T19:03:43Z dc.date.issued 1998 en_US dc.identifier 1998-RE-11 en_US dc.identifier.uri http://hdl.handle.net/1811/18912 dc.description Author Institution: Department of Physics, The Ohio State University en_US dc.description.abstract Rotationally inelastic cross sections of $H_{2}S-He$ collisions at low temperature (1-20 K) have been measured using time resolved millimeter wave absorption techniques with a collisional cooling cell. Data from this experiment are compared with low temperature pressure broadening data to illuminate the relative roles of elastic and inelastic collisions in low temperature broadening. At ambient temperatures, microwave pressure broadening can be attributed to inelastic processess, while at low temperatures we have found that elastic collisions are dominant. This is due in part to the lack of available kinetic energy to excite a collision-induced rotational transition as well as the resonant formation of quasi-bound complexes at low collision energy. Data from this type of experiment can be used by astrophysicists to model the behavior of molecules in the non-equilibrium environments of interstellar clouds. en_US dc.format.extent 101524 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title TIME RESOLVED STUDIES OF LOW TEMPERATURE INELASTIC COLLISIONS: $H_{2}S-He$ en_US dc.type article en_US
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