Carbon K-shell photoionization of fixed-in-space C{sub 2}H{sub 4}
2010
Measurements of the photoelectron angular distributions in the body-fixed frame (MFPAD) have been carried out for 290- to 320-eV photons (just above the carbon K-shell ionization threshold) on C{sub 2}H{sub 4} using an approach based on cold-target recoil-ion momentum spectroscopy (COLTRIMS). The results are compared with a theoretical calculation and excellent agreement is found. A direct verification of the 'f-wave shape resonance' is accomplished by obtaining the complex amplitude of the l=3 partial wave, which shows a peak in its absolute value and a relative phase change of {pi} as the energy is scanned across the resonance.
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