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Review of Scientific Instruments : High-resolution Rydberg tagging time-of-flight measurements of atomic photofragments by single-photon vacuum ultraviolet laser excitation

By Brant Jones, Jingang Zhou, Lei Yang, and C. Y. Ng

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Book Id: WPLBN0002169677
Format Type: PDF eBook :
File Size: Serial Publication
Reproduction Date: 12 December 2008

Title: Review of Scientific Instruments : High-resolution Rydberg tagging time-of-flight measurements of atomic photofragments by single-photon vacuum ultraviolet laser excitation  
Author: Brant Jones, Jingang Zhou, Lei Yang, and C. Y. Ng
Volume: Issue : December 2008
Language: English
Subject: Science, Physics, Natural Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Review of Scientific Instruments Collection
Historic
Publication Date:
Publisher: American Institute of Physics

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Jingang Zhou, Lei Yang, And C. Y. N, B. J. (n.d.). Review of Scientific Instruments : High-resolution Rydberg tagging time-of-flight measurements of atomic photofragments by single-photon vacuum ultraviolet laser excitation. Retrieved from http://hawaiilibrary.net/


Description
Description: By coupling a comprehensive tunable vacuum ultraviolet (VUV) laser system to a velocity-mapped ion imaging apparatus, we show that high-resolution high-n Rydberg tagging time-of-flight (TOF) measurements of nascent atomic photofragments formed by laser photodissociation can be made using single-photon VUV laser photoexcitation. To illustrate this single-photon Rydberg tagging TOF method, we present here the results of the VUV laser high-n Rydberg tagging TOF measurements of O(3P2) and S(3P2) formed in the photodissociation of SO2 and CS2 at 193.3 and 202.3 nm, respectively. These results are compared to those obtained by employing the VUV laser photoionization time-sliced velocity-mapped ion imaging technique. The fact that the kinetic energy resolutions achieved in the VUV laser high-n Rydberg tagging TOF measurements of O and S atoms are found to be higher than those observed in the VUV laser photoionization, time-sliced velocity-mapped ion imaging studies show that the single-photon VUV laser high-n Rydberg tagging TOF method is useful and complementary to state-of-the-art time-sliced velocity-mapped ion imaging measurements of heavier atomic photofragments, such as O and S atoms. Furthermore, the general agreement observed between the VUV laser high-n Rydberg tagging TOF and velocity-mapped ion imaging experiments supports the conclusion that the lifetimes of the tagged Rydberg states of O and S atoms are sufficiently long to allow the reliable determination of state-resolved UV photodissociation cross sections of SO2 and CS2 by using the VUV laser high-n Rydberg tagging TOF method.

 

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