Rotational Cooling Dynamics Of Hot Trapped Oh<sup>−</sup> Ions Probed By Vmi Photoelectron Spectroscopy
Shahi, Abhishek
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FJ04_5341.pdf
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https://hdl.handle.net/2142/111168
Description
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
Issue Date
2021-06-25
Keyword(s)
Photodissociation and photochemistry
Date of Ingest
2021-09-24T21:09:09Z
2022-01-21T16:10:45Z
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}
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5341.pdf
FJ04_5341.pdf
