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Static characteristics of the ionization event in the He(23S)-HD collision system

✍ Scribed by Jan Vojtík

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
593 KB
Volume
57
Category
Article
ISSN
0020-7608

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✦ Synopsis

Vibrational population factors for the nascent Penning ions HD+(v'N ... He) and energy of the corresponding Penning electrons are calculated for the ionization event He(2'S)-HD( V " = 0) -+ [He ... HD+(v')] + etaking place at a range of the He*-HD separations and orientations accessible by the system during thermal energy collisions. The vibrational population factors are obtained from the local widths of the He(2'S)-HD(v'' = 0, N) state with respect to autoionization to HDf( ... He) in its v'th vibrational level. The initial overall picture of the autoionization event is consistent with the He(23S)-H,(v" = 0) one. On the other hand, the vibrational population factors are different from the approximate average populations used in initial model theoretical considerations about the Penning processes in the system. Variation of the calculated quantities with changes in the He*-HD separations and orientations is found to be smooth enough to guarantee that the present data might form a sound basis for construction of analytical representations of the corresponding 2D surfaces and for future study of the dynamics of the collision system 0 1996 John Wiley & Sons, Inc. full use of the fact that before the ionization event A* + BC( v r r ) + [A ... BC+( v')] + etaking place in repulsive systems the BC coordinate is very weakly coupled to the remaining ones. A separate quantum mechanical treatment of the perturbed BC( V " )[ BC +( v')] vibrational motion is adopted and included into the calculation of static characteristics of the system which thus depend on the A*-BC distance R , the A*-BC angle y , and

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