Infrared photodissociation of benzene dimers in the 1000 cm−1 frequency region

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Abstract
The infrared photodissociation of benzene dimers has been investigated in the frequency region of the CO2 laser. A single absorption peak is observed with a maximum at 1038 cm−1, and a full width at half‐maximum of about 2 cm−1. The laser fluence dependence of the dissociation yield and two‐laser hole burning experiments both indicate that the linewidth is mostly homogeneous. The benzene monomer fragments from the photodissociation emerge with an isotropic angle distribution. A relatively large fraction of the available energy goes into product translation, and the remainder into rotation.