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Depletion of the ex...
Depletion of the excited state population in negative ions using laser photodetachment in a gas-filled RF quadrupole ion guide
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- Lindahl, Anton, 1982 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Hanstorp, Dag, 1960 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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Forstner, O. (author)
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Gibson, N. D. (author)
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Gottwald, T (author)
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Wendt, K. (author)
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Havener, C. C. (author)
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Liu, Y. (author)
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(creator_code:org_t)
- 2010-05-19
- 2010
- English.
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In: Journal of Physics B: Atomic, Molecular and Optical Physics. - : IOP Publishing. - 0953-4075 .- 1361-6455. ; 43:11
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Abstract
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- The depopulation of excited states in beams of negatively charged carbon and silicon ions was demonstrated using collisional detachment and laser photodetachment in a radio-frequency quadrupole ion guide filled with helium. The high-lying, loosely bound D-2 excited state in C- was completely depleted through collisional detachment alone, which was quantitatively determined within 6%. For Si-the combined signal from the population in the P-2 and D-2 excited states was only partly depleted through collisions in the cooler. The loosely bound P-2 state was likely to be completely depopulated, and the more tightly bound D-2 state was partly depopulated through collisions. 98(2)% of the remaining D-2 population was removed by photodetachment in the cooler using less than 2 W laser power. The total reduction of the excited population in Si-, including collisional detachment and photodetachment, was estimated to be 99(1)%. Employing this novel technique to produce a pure ground state negative ion beam offers possibilities of enhancing selectivity, as well as accuracy, in high-precision experiments on atomic as well as molecular negative ions.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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Lindahl, Anton, ...
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Hanstorp, Dag, 1 ...
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Forstner, O.
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Gibson, N. D.
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Gottwald, T
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Wendt, K.
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show more...
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Havener, C. C.
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Liu, Y.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
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Journal of Physi ...
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University of Gothenburg