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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:2
UID:UW-Physics-Event-4855
DTSTART:20180720T200000Z
DTEND:20180720T210000Z
DTSTAMP:20260418T224154Z
LAST-MODIFIED:20180716T163744Z
LOCATION:Chamberlin 5310
SUMMARY:Rotational-state-selective field ionization of H_2 Rydberg sta
 tes\, Atomic Physics Seminar\, William Setzer\, Thomas Morgan's group\
 , Wesleyan University
DESCRIPTION:Understanding the ionization properties of diatomic molecu
 les is of fundamental importance to chemical physics and many spectros
 copic applications. Here\, I present rotational-state-selective field 
 ionization spectra of highly excited triplet nd H2 Rydberg states. A f
 ast 6 keV beam of metastable c3∏u- 2pπ molecules is excited to v = 
 0\, R(1)nd1 (n = 17-27) Rydberg states by a frequency-doubled tunable 
 dye laser and ionized by a static electric field as large as ~35 kV/cm
 . For each Rydberg state\, we observe\, as expected\, an ion yield tha
 t corresponds to diabatic field ionization into the N+ = 1 continuum. 
 At higher fields\, we observed an additional ion yield. A model\, whic
 h considers a diabatic traverse of the Stark map\, expects the N+ = 1 
 ion yield and allows for characterization of the second ion yield as i
 onization into the N+ = 3 continuum and the result of a rotational-sta
 te population transfer. Candidates for the population-transfer mechani
 sm are discussed.
URL:https://www.physics.wisc.edu/events/?id=4855
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