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Title:Rotational Cooling Dynamics Of Hot Trapped Oh Ions Probed By Vmi Photoelectron Spectroscopy
Author(s):Shahi, Abhishek
Contributor(s):Zajfman, Daniel; Heber, Oded; Gupta, Dhanoj; Mishra, Saurabh
Subject(s):Photodissociation and photochemistry
Abstract:A VMI photoelectron spectroscopy inside an electrostatic ion beam trap (EIBT) is used to probe the time dependent dynamics of rotational states population. The photodetachement of OH$^{-}$ ion results neutral OH in its $\Pi$$_{3/2}$ and $\Pi$$_{1/2}$ states and corresponding VMI photoelectron spectra of unresolved P-branch transitions are shown in figure for different times in the EIBT. As storage time increases, the peak radius of P-transitions decreases indicate that population of high rotational levels shift to the low rotational levels. Intersting findinds on internal dynamics of OH$^{-}$ as a function of storage time, change in individual rotational states population as a function of storage time, rate coefficients of such cooling process will be discussed in details during presentation. \begin{wrapfigure}{l}{18cm} \centering \includegraphics[scale=0.3]{OH-_cooling.eps} \caption{Figure: VMI spectra of OH$^{-}$ probed by a CW laser (682nm) as a function of trapping time} \end{wrapfigure}
Issue Date:2021-06-25
Publisher:International Symposium on Molecular Spectroscopy
Genre:Conference Paper / Presentation
Date Available in IDEALS:2021-09-24

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