Approximate Expression for the Tunneling Correction

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Abstract
By using an approximate method, the tunneling‐correction factor for the unsymmetrical Eckart potential function and its temperature dependence are formulated in forms which are capable of simple numerical calculations. The method is designed to evaluate the integral which includes a violently changing exponent. The result is compared with Johnston's results obtained by electronic computation; the agreement is good in chemically interesting cases.

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