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Concina B, Baguenard B, Calvo F, et al. Kinetic energy spectra in thermionic emission from small tungsten cluster anions: evidence for nonclassical electron capture. J Chem Phys. 2010;132(10):104307doi: 10.1063/1.3349711.
Concina, B., Baguenard, B., Calvo, F., & Bordas, C. (2010). Kinetic energy spectra in thermionic emission from small tungsten cluster anions: evidence for nonclassical electron capture. The Journal of chemical physics, 132(10), 104307. https://doi.org/10.1063/1.3349711
Concina, Bruno, et al. "Kinetic energy spectra in thermionic emission from small tungsten cluster anions: evidence for nonclassical electron capture." The Journal of chemical physics vol. 132,10 (2010): 104307. doi: https://doi.org/10.1063/1.3349711
Concina B, Baguenard B, Calvo F, Bordas C. Kinetic energy spectra in thermionic emission from small tungsten cluster anions: evidence for nonclassical electron capture. J Chem Phys. 2010 Mar 14;132(10):104307. doi: 10.1063/1.3349711. PMID: 20232960.
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J Chem Phys. 2010 Mar 14;132(10):104307. doi: 10.1063/1.3349711.

Kinetic energy spectra in thermionic emission from small tungsten cluster anions: evidence for nonclassical electron capture.

The Journal of chemical physics

Bruno Concina, Bruno Baguenard, Florent Calvo, Christian Bordas

Affiliations

  1. LASIM, UMR 5579, Université Lyon 1, CNRS, F-69622 Villeurbanne, France. [email protected]

PMID: 20232960 DOI: 10.1063/1.3349711

Abstract

The delayed electron emission from small mass-selected anionic tungsten clusters W(n)(-) has been studied for sizes in the range 9 < or = n < or = 21. Kinetic energy spectra have been measured for delays of about 100 ns after laser excitation by a velocity-map imaging spectrometer. They are analyzed in the framework of microreversible statistical theories. The low-energy behavior shows some significant deviations with respect to the classical Langevin capture model, which we interpret as possibly due to the influence of quantum dynamical effects such as tunneling through the centrifugal barrier, rather than shape effects. The cluster temperature has been extracted from both the experimental kinetic energy spectrum and the absolute decay rate. Discrepancies between the two approaches suggest that the sticking probability can be as low as a few percent for the smallest clusters.

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