High resolution threshold and pulsed field ionization photoelectron spectroscopy using multi-bunch synchrotron radiation

Abstract

High-resolution state-selected ion-molecule reaction studies using pulsed field ionization photoelectronsecondary ion coincidence method Rev. Sci. Instrum. 74, 4096 (2003); 10.1063/1.1599071High-resolution pulsed field ionization photoelectron-photoion coincidence spectroscopy using synchrotron radiation Rev.A study of the SO molecule with photoelectron spectroscopy using synchrotron radiationWe have demonstrated a resolution of 0.8 meV ͓full width at half-maximum ͑FWHM͔͒ for threshold photoelectron measurements using a steradiancy-type zero kinetic energy photoelectron ͑ZEKE-PE͒ analyzer and the high resolution monochromatized vacuum ultraviolet ͑VUV͒ undulator synchrotron radiation of the chemical dynamics beamline at the advanced light source ͑ALS͒. Using this high resolution ZEKE-PE energy analyzer to filter prompt electrons and by employing a proper voltage pulsing scheme adapted to the timing structure of the ALS, we have achieved a resolution of 0.5 meV ͑FWHM͒ for pulsed field ionization photoelectron ͑PFI-PE͒ measurements with little contamination from prompt photoelectrons produced from direct photoionization and autoionizing processes. The experiment scheme presented here is generally applicable to PFI-PE studies using multi-bunch VUV synchrotron radiation at other synchrotron radiation facilities.

A vacuum ultraviolet pulsed field ionization-photoelectron study of cyanogen cation in the energy range of 13.2–15.9 eV

“…The dark-gap PFI-PE scheme using the high-resolution monochromatized VUV undulator synchrotron radiation at the ALS has been described in detail. [24][25][26][27][28][29] Briefly, the ALS storage ring in the multibunch mode has a dark gap of 102 ns in every period of 656 ns. The PFI electric field pulse ͑2.2 V / cm, 40 ns width͒ was applied 10 ns after the beginning of the dark gap in every ALS ring period.…”

Photodissociation yield spectroscopy of vinyl bromide cation generated by mass-analyzed threshold ionization: Vibrational spectroscopy and decay dynamics in the B̃ state

“…23,24 vuv from synchrotron radiation source has also been utilized for one-photon ZEKE/MATI. 17,25 Availability of vuv with continuously variable wavelength is its advantage even though monochromaticity of the light is not as good as for the laser-based sources.…”

High-resolution energy-selected study of the reaction NH3+→NH2++H: Accurate thermochemistry for the NH2/NH2+ and NH3/NH3+ systems

“…1,10,12,[22][23][24][25] In the present experiment, Ar was used in the gas filter to suppress higher undulator harmonics with photon energies (hν) greater than 15.76 eV.…”