A versatile electron-ion coincidence spectrometer for photoelectron momentum imaging and threshold spectroscopy on mass selected ions using synchrotron radiation

doi:https://doi.org/10.1063/1.3079331

Title: A versatile electron-ion coincidence spectrometer for photoelectron momentum imaging and threshold spectroscopy on mass selected ions using synchrotron radiation

Full Record
Other Related Research

Abstract

We present a photoelectron-photoion coincidence (PEPICO) spectrometer named DELICIOUS II which combines a velocity map imaging apparatus with a Wiley-McLaren time of flight analyzer for the study of gas phase samples in interaction with the synchrotron radiation (SR). This versatile system is capable of providing photoelectron images on mass-selected compounds with kinetic energy resolutions of {delta}E/E=5% and a 17 eV bandwidth, as well as threshold photoelectron spectra with a measured resolution of 0.8 meV, as demonstrated on the 3p{sup -1} ionization of argon. This instrument is also employed for threshold PEPICO experiments, allowing the selection of the parent ion's internal state with sub-meV resolution for light masses (<40 amu) and with typically 2 meV resolution for a mass of 100 amu and with a mass resolving power above 200. The continuous operation of the extraction fields and the independence from the electron's time of flight are well adapted to the quasicontinuous multibunch mode of the SR. This, together with the high transmission of both the electron and ion detection, allows a high coincidence counting rate and facilitates the subtraction of false coincidences. We illustrate the spectrometer's coincidence principle of operation with examples from the valence photoionization of an Ar+Xe mixturemore » and of CF{sub 4}.« less

Authors:

Garcia, Gustavo A; Soldi-Lose, Heloiese; Nahon, Laurent ^[1]

Synchrotron SOLEIL, L'Orme des Merisiers, St Aubin, B.P. 48, 91192 Gif sur Yvette (France)

Publication Date:: 2009-02-15

OSTI Identifier:: 21266748

Resource Type:: Journal Article

Journal Name:: Review of Scientific Instruments

Additional Journal Information:: Journal Volume: 80; Journal Issue: 2; Other Information: DOI: 10.1063/1.3079331; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748

Country of Publication:: United States

Language:: English

Subject:: 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CARBON TETRAFLUORIDE; COINCIDENCE METHODS; ELECTRONS; ION DETECTION; IONS; KINETIC ENERGY; PHOTOELECTRON SPECTROSCOPY; PHOTOIONIZATION; RESOLUTION; SYNCHROTRON RADIATION; TIME-OF-FLIGHT MASS SPECTROMETERS; TIME-OF-FLIGHT METHOD

Citation Formats


                    Garcia, Gustavo A, Soldi-Lose, Heloiese, and Nahon, Laurent. A versatile electron-ion coincidence spectrometer for photoelectron momentum imaging and threshold spectroscopy on mass selected ions using synchrotron radiation.  United States: N. p., 2009. 
        Web.  doi:10.1063/1.3079331.

Copy to clipboard


                    Garcia, Gustavo A, Soldi-Lose, Heloiese, & Nahon, Laurent. A versatile electron-ion coincidence spectrometer for photoelectron momentum imaging and threshold spectroscopy on mass selected ions using synchrotron radiation.  United States.  https://doi.org/10.1063/1.3079331

Copy to clipboard


                    Garcia, Gustavo A, Soldi-Lose, Heloiese, and Nahon, Laurent. Sun .  
        "A versatile electron-ion coincidence spectrometer for photoelectron momentum imaging and threshold spectroscopy on mass selected ions using synchrotron radiation".  United States.  https://doi.org/10.1063/1.3079331.

Copy to clipboard


                    
@article{osti_21266748,

  title        = {A versatile electron-ion coincidence spectrometer for photoelectron momentum imaging and threshold spectroscopy on mass selected ions using synchrotron radiation},

  author       = {Garcia, Gustavo A and Soldi-Lose, Heloiese and Nahon, Laurent},

  abstractNote = {We present a photoelectron-photoion coincidence (PEPICO) spectrometer named DELICIOUS II which combines a velocity map imaging apparatus with a Wiley-McLaren time of flight analyzer for the study of gas phase samples in interaction with the synchrotron radiation (SR). This versatile system is capable of providing photoelectron images on mass-selected compounds with kinetic energy resolutions of {delta}E/E=5% and a 17 eV bandwidth, as well as threshold photoelectron spectra with a measured resolution of 0.8 meV, as demonstrated on the 3p{sup -1} ionization of argon. This instrument is also employed for threshold PEPICO experiments, allowing the selection of the parent ion's internal state with sub-meV resolution for light masses (<40 amu) and with typically 2 meV resolution for a mass of 100 amu and with a mass resolving power above 200. The continuous operation of the extraction fields and the independence from the electron's time of flight are well adapted to the quasicontinuous multibunch mode of the SR. This, together with the high transmission of both the electron and ion detection, allows a high coincidence counting rate and facilitates the subtraction of false coincidences. We illustrate the spectrometer's coincidence principle of operation with examples from the valence photoionization of an Ar+Xe mixture and of CF{sub 4}.},

  doi          = {10.1063/1.3079331},

  url          = {https://www.osti.gov/biblio/21266748},
  journal      = {Review of Scientific Instruments},

  issn         = {0034-6748},

  number       = 2,

  volume       = 80,

  place        = {United States},

  year         = {2009},

  month        = {2}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1063/1.3079331

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

High-resolution pulsed field ionization photoelectron-photoion coincidence spectroscopy using synchrotron radiation

Journal Article Jarvis, G K ; Weitzel, K ; Malow, M ; ... - Review of Scientific Instruments

We have developed a sensitive and generally applicable scheme for performing pulsed field ionization (PFI) photoelectron (PFI-PE)-photoion coincidence (PFI-PEPICO) spectroscopy using two-bunch and multibunch synchrotron radiation at the Advanced Light Source. We show that this technique provides an ion internal state (or energy) selection limited only by the PFI-PE measurement. Employing a shaped pulse for PFI and ion extraction, a resolution of 0.6 meV [full width at half maximum (FWHM)] is observed in the PFI-PEPICO bands for Ar{sup +}({sup 2}P{sub 3/2,1/2}). As demonstrated in the PFI-PEPICO study of the process, O{sub 2}+h{nu}{r_arrow}O{sub 2}{sup +}(b&hthinsp;{sup 4}{Sigma}{sub g}{sup {minus}},&hthinsp;v{sup +}=4,&hthinsp;N{sup +})+e{sup {minus}}{r_arrow}O{supmore »« less
https://doi.org/10.1063/1.1150009
The design of double electrostatic-lens optics for resonance enhanced multiphoton ionization and photoelectron imaging experiments

Journal Article Qu, Zehua ; Li, Chunsheng ; Qin, Zhengbo ; ... - Review of Scientific Instruments

Compared to single ion/electron-optics for velocity-map imaging, a double-focusing lens assembly designed not only allows for mapping velocity imaging of photoelectrons but also allows for investigating the vibrational structure of the intermediate states of neutral species in resonance enhanced multiphoton ionization (REMPI) spectra. In this presentation, in order to record REMPI and photoelectron spectra separately, we have constructed a compact photoelectron velocity-map imaging (VMI) apparatus combined with an opposite linear Wiley-Mclaren time-of-flight mass spectrometer (TOFMS). A mass resolution (m/Δm) of ∼1300 for TOFMS and electron energy resolution (ΔE/E) of 2.4% for VMI have been achieved upon three-photon ionization of Xemore »« less
https://doi.org/10.1063/1.4922521
A threshold photoelectron-photoion coincidence spectrometer with double velocity imaging using synchrotron radiation

Journal Article Xiaofeng, Tang ; Xiaoguo, Zhou ; Mingli, Niu ; ... - Review of Scientific Instruments

A novel threshold photoelectron-photoion coincidence (TPEPICO) imaging spectrometer at the U14-A beamline of the Hefei National Synchrotron Radiation Laboratory is presented. A set of open electron and ion lenses are utilized to map velocity imaging of photoelectrons and photoions simultaneously, in which a repelling electric field using an extra lens is applied to magnify images of photoelectrons instead of traditional accelerating electric field in order to suppress the contribution of energetic electrons in the threshold photoelectron spectroscopy (TPES) and the mass-selected TPEPICO spectroscopy. The typical energy resolution of TPES is measured to be 9 meV (full width at half maximum),more »« less
https://doi.org/10.1063/1.3250872
Imaging photoelectron photoion coincidence spectroscopy with velocity focusing electron optics

Journal Article Bodi, Andras ; Johnson, Melanie ; Gerber, Thomas ; ... - Review of Scientific Instruments

An imaging photoelectron photoion coincidence spectrometer at the vacuum ultraviolet (VUV) beamline of the Swiss Light Source is presented and a few initial measurements are reported. Monochromatic synchrotron VUV radiation ionizes the cooled or thermal gas-phase sample. Photoelectrons are velocity focused, with better than 1 meV resolution for threshold electrons, and also act as start signal for the ion time-of-flight analysis. The ions are accelerated in a relatively low, 40-80 V cm{sup -1} field, which enables the direct measurement of rate constants in the 10{sup 3}-10{sup 7} s{sup -1} range. All electron and ion events are recorded in a triggerlessmore »« less
https://doi.org/10.1063/1.3082016
Pulsed field-ionization photoelectron-photoion coincidence study of the process N{sub 2}+h{nu}{yields}N{sup +}+N+e{sup -}: Bond dissociation energies of N{sub 2} and N{sub 2}{sup +}

Journal Article Xiaonan, Tang ; Yu, Hou ; Ng, C Y ; ... - Journal of Chemical Physics

We have examined the dissociative photoionization reaction N{sub 2}+h{nu}{yields}N{sup +}+N+e{sup -} near its threshold using the pulsed field-ionization photoelectron-photoion coincidence (PFI-PEPICO) time-of-flight (TOF) method. By examining the kinetic-energy release based on the simulation of the N{sup +} PFI-PEPICO TOF peak profile as a function of vacuum ultraviolet photon energy and by analyzing the breakdown curves of N{sup +} and N{sub 2}{sup +}, we have determined the 0-K threshold or appearance energy (AE) of this reaction to be 24.2884{+-}0.0010 eV. Using this 0-K AE, together with known ionization energies of N and N{sub 2}, results in more precise values for themore »« less
https://doi.org/10.1063/1.1995699

Similar Records