Phys. Rev. Lett. 56, 1455–1458 (1986)Electron-Ejection Asymmetries by Molecular Orientation Following K-Shell Excitation of COReceived 27 January 1986; published in the issue dated 7 April 1986 We report the first observation of electron-ejection asymmetries due to molecular orientation following K-shell photoexcitation in a free molecule. The angular distributions of electrons emitted by the decay of K-shell vacancies were measured in the vicinity of the π* discrete and the σ* shape resonance of CO. We see a sharp drop of the angular distribution asymmetry parameter to β=-1 at the π* resonance as predicted by theory, but no comparable effect across the σ* shape resonance. The results are discussed with respect to the intrinsic anisotropy of the K-shell vacancies. © 1986 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.56.1455
DOI:
10.1103/PhysRevLett.56.1455
PACS:
33.60.Fy, 33.80.Eh
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