✦ LIBER ✦

The derivation of photofragment angular distributions in homonuclear diatomic molecules

✍ Scribed by L.D.A. Siebbeles; J.M. Schins; W.J. van der Zande; J.A. Beswich

Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 301 KB
Volume: 187
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(91)90449-j

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✦ Synopsis

In the literature the differential photofragmentation cross sections (from which the angular distribution of the fragments is obtained) is usually derived by the use of a continuum wavefunction, which asymptotically has an outgoing plane-wave component exp (iK-R) whose wavevector K gives the direction of detection. In this note we show that the photofragments' spatial anisotropy can be obtained without any use of these waves by studying the excited state wavepacket. This simpler treatment not only provides the correct final expressions, but also automatically takes into account the Pauli principle for the nuclei.

Photon excitation of a molecule to an energy above the dissociation limit usually results in spatially anisotropic distributions of the photofragments.

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