ANGULAR DISTRIBUTION OF IONIC FRAGMENTS IN THE DISSOCIATION OF SO_2_^2+^

Ataru Kobayashi, Yasuyuki Konishi, and Tochio Masuoka

Osaka City University, Osaka, Japan

Photoion-photon coincidence (PIPICO) technique has been used to measure the
angular distribution of O^+^ + SO^+^ and O^+^ + S^+^ fragments in the
dissociative double photoionization of SO_2_ in the 37-120eV region with
linearly polarized synchrotron radiation. The obtained asymmetry parameter
β shows a small deviation from zero in the whole energy range, indicating t
hat isotropic fragmentation takes place in either cases of O^+^ + SO^+^ or
O^+^ + S^+^.