Angular Correlation Between B K-VV Auger Electrons of BF_3 Molecules and Coincident Fragment Ions: Manifestation of the Difference Between the Angular Correlation and Molecular Frame Auger Electron Angular Distribution

摘要

We have measured the angular correlation between the B K-VV Auger electrons of BF_3 molecules and the coincident fragment-ion pairs of BF_2~+-F~+. Then, we have found that the measured angular correlation patterns depending on the mutual angle between the light polarization direction and molecular orientation are affected by the anisotropic axis distribution of the molecular ensemble of BF_3~+ reflecting the anisotropic nature of photon-molecule interaction. In this context, we have pointed out generally that for coincidence experiments, so-called molecular frame Auger electron angular distributions are realized only if the axis distribution of the molecular ion ensemble is isotropic.