期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.193401
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This experimental work focuses on the complex autoionization dynamics of Ar-2 clusters below the first ionization energy of the argon atom. Ar-2 is submitted to vacuum ultraviolet radiation, and the photoelectron spectra are collected in coincidence with the cluster ions. The ionization dynamics is revealed by the dependence on the photon energy. We applied a new experimental method which we developed to analyze the photoelectron signal. Thus, we were able (i) to get the complete vibrational progression of Ar-2(+) that was never observed up to now, especially identifying the 0-0 transition overcoming the usual Franck-Condon limitations during single photoionization, and (ii) to obtain the projections of the vibrational wave functions of the autoionizing states over the Ar-2(+) functions. This method provides a powerful tool to test the potential energy curves computed by high level theoretical calculations on Rydberg states.
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