Journal ArticleDOI
Laser–ion coaxial beams spectrometer
B. A. Huber,Thomas M. Miller,Philip C. Cosby,H. D. Zeman,R. L. Leon,J. T. Moseley,James R. Peterson +6 more
TLDR
In this article, a transverse quadrupole electric field arrangement is used to deflect the ion beam into and out of the laser beam axis, and a high-resolution 180° electrostatic analyzer is used for photofragment energy analysis.Abstract:
An apparatus has been constructed to provide laser excitation of ion beams in both coaxial and crossed configurations. The coaxial geometry provides very high sensitivity and nearly Doppler‐free wavelength resolution for spectroscopic measurements, and allows the use of the Doppler shift to ’’tune’’ the wavelength. A novel transverse quadrupole electric field arrangement is used to deflect the ion beam into and out of the laser beam axis. The ion beam is highly collimated and a high‐resolution 180° electrostatic analyzer is used for photofragment energy analysis. The apparatus has demonstrated a resolution of better than 10 meV for normal photofragment spectroscopy and 0.001 meV for coaxial beams photofragment spectroscopy using a single‐mode laser. While providing these high resolutions the apparatus has an overall sensitivity several orders of magnitude greater than conventional ones.read more
Citations
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Journal ArticleDOI
Atomic negative ions: structure, dynamics and collisions
TL;DR: A review of the knowledge of the structure, dynamics and collisions of atomic negative ions, as accumulated at the end of 2003, is given in this article, which describes how the research exploring these ions developed during the last decade.
Journal ArticleDOI
A review of the applications to solids of the laser ion source in mass spectrometry
R.J. Conzemius,J.M. Capellen +1 more
TL;DR: In this paper, the authors present a review of the laser applications in emission spectrometry and their applications in biological, geological, and industrial applications, as well as the applications of laser-solid interactions.
Journal ArticleDOI
Metal cluster ion photofragmentation
TL;DR: In this paper, a photodissociation method was used for mass-selected transition metal cluster ions cooled in a supersonic expansion to reveal the thresholds and time scales of various fragmentation pathways.
Book ChapterDOI
Experimental studies on cluster ions
Tilmann D. Märk,A.W. Castleman +1 more
TL;DR: Cluster ions are a nonrigid assembly of components having properties between those of large gas phase molecules and the bulk condensed state as discussed by the authors, and they are used for fuel injection into fusion reactors and cluster ions are also present in other high-temperature systems such as those designed as sources of energy employing magnets and hydrodynamics.
Journal ArticleDOI
Photofragment spectroscopy and potential curves of Ar + 2
TL;DR: In this paper, the photofragment energy distributions for the process Kr2+[1(1/2)u]+hν→Kr++Kr using a 3 keV ion beam and CW lasers, both coaxial and crossed with the ion beam, at 11 wavelengths between 4680 and 7993 A.
References
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Journal ArticleDOI
Doppler line shape of atomic fluorescence excited by molecular photodissociation
TL;DR: In this article, a semiclassical treatment of the photodissociation of a diatomic molecule is developed, and it is shown that the angular distribution of products will often be peaked parallel or perpendicular to the direction of the incident light beam.
Journal ArticleDOI
High-resolution laser spectroscopy in fast beams
TL;DR: In this article, a method of obtaining narrow absorption lines is proposed, based on a simple property of accelerated beams, which would yield a resolution of a few megahertz at optical frequencies.
Journal ArticleDOI
Observation of the Infrared Spectrum of the Hydrogen Molecular Ion H D
TL;DR: In this article, the vibration-rotational spectrum of the hydrogen molecular ion H${\mathrm{D}}+}$ has been observed by means of a new ion-beam laser-resonance method employing Doppler effect tuning and collisional detection.
Journal ArticleDOI