On the Abnormal Rotation of OH Radicals

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概要

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• The abnormal rotational intensity distribution of the OH band spectrum ^2Σ+-^2II emitted through discharge in water vapour has been interpreted to be due to simultaneous dissociation of H_2O and excitation of OH. A quantum-mechanical calculation of electronic cnergies of H_2O molecules by semiempirical AO approximation shows that in two electronically excited states of H_2O, both of them being cbaracterised by symmetry type of ^1A_1 and ^3B^2, respectively, a hydrogen atom of H_2O takes a path of particular direction in the dissociation process to excite OH^* radical (2Σ^+) into a rotational state. Such an elementary process for dissociation can be understood by an interaction between ditferent symmetry types resulting from deformation of the configuration of H_2O molecule from an isosceles into a scalene triaugle at the decomposition. Greater energy released in the ^3B_2 than in the ^1A_1 is responsible for the abnormal rotation (J〜20) of OH^* from the ^3B_2 , and the ^1A_1 gives OH^* of J〜5. Another treatr ment by MO method is reviewed.

• 1952-04-25

著者

• Niira Kazuo

  Tokyo Institute Of Technology

関連論文

• On the Abnormal Rotation of OH Radicals

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