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Threshold behaviour...
Threshold behaviour in photodetachment into a final state with large negative polarizability
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- Rohlén, Johan (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Lindahl, Anton, 1982 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Hultgren, Hannes, 1983 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Thomas, Richard D. (författare)
- Stockholms universitet,Fysikum
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Pegg, D. J. (författare)
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- Hanstorp, Dag, 1960 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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(creator_code:org_t)
- 2014-05-30
- 2014
- Engelska.
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Ingår i: Epl. - : IOP Publishing. - 0295-5075 .- 1286-4854. ; 106:5
- Relaterad länk:
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https://gup.ub.gu.se...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
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- In a recent experiment, Lindahl et al. (Lindahl A. O. et al., Phys. Rev. Lett., 108 (2012) 033004) observed a new threshold behavior in the photodetachment of the potassium negative ion when the residual atom is left in the 5 (2)G state. Unfortunately the resonance close to threshold made it more difficult to apply the semi-classical model that was developed to describe the threshold behavior. In this paper we present a study of the threshold behavior of the 5 (2)G partial cross-section in the photodetachment of the sodium negative ion. The experiment was conducted using a collinear beams apparatus where the detection was performed using a resonance ionization scheme. We observe the same threshold behavior as in the previous experiment, but without any obfuscating resonance. The model derived in the previous paper is found to fit the observed cross-section up to 35 meV above threshold. The present experiment clearly demonstrates the threshold behaviour for the fundamental process of a free electron moving in the field of an atom with a large negative polarizability. Copyright (C) EPLA, 2014
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
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- Physics
- Multidisciplinary
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