Measurement of the electron affinity of potassium

Andersson, Klas; Sandström, Joakim; Kiyan, Igor Yu.; Hanstorp, Dag; Pegg, D. J.

doi:10.1103/physreva.62.022503

Cited by 40 publications

(22 citation statements)

References 10 publications

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“…which have threshold energies of 4.254 987(12), 4.296 210 (14), and 4.297 522(12) eV respectively [19,20]. The main uncertainty in the threshold energies results from the uncertainty in the electron affinity of potassium, which is 0.501 459(12) eV [20].…”

Section: Methodsmentioning

confidence: 99%

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Experimental studies of partial photodetachment cross sections in K−below the K(7 2P) threshold

et al. 2012

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A collinear beams apparatus has been used to determine photodetachment cross sections for K − in the photon energy range 4.250-4.360 eV. State-selective detection, utilizing a resonance ionization scheme, was applied to measure partial cross sections for those channels which leave the residual K atoms in the excited 7 2 S, 5 2 F , and 5 2 G states. The energy region studied encompassed the openings of the aforementioned channels, as well as the channel that leaves the K atom in the 7 2 P state. Two previously unobserved resonances were seen in all three partial cross sections between the K(5 2 G) and K(7 2 P ) thresholds. It is shown that a more reliable determination of resonance parameters can be made if the same resonances are observed in several channels. In the region below the K(5 2 F ) threshold, three previously observed resonances were investigated [Kiyan et al., Phys. Rev. Lett. 84, 5979 (2000)]. A greatly increased modulation of the signal was obtained by detecting in the K(7 2 S) channel instead of the K(5 2 S) channel used in the previous study. Furthermore, the shapes of the cross sections in the threshold regions are discussed. A detailed description of the apparatus and the experimental procedure employed is presented in the paper.

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Section: Methodsmentioning

confidence: 99%

“…The main uncertainty in the threshold energies results from the uncertainty in the electron affinity of potassium, which is 0.501 459(12) eV [20]. The energy range studied includes the openings of the three aforementioned channels as well as that of the K(7 2 P ) channel, which has a threshold energy of 4.353 636 (14) eV.…”

Section: Methodsmentioning

confidence: 99%

Experimental studies of partial photodetachment cross sections in K−below the K(7 2P) threshold

et al. 2012

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“…They can be built either in the spatial [45] or the temporal domain [27,44]. Integrated on an atom chip, they are very sensitive devices that may be used to measure inertial forces or even to perform computation [142]. Coherence properties in more complicated networks can be studied by observing interference and speckle patterns.…”

Section: Interferometersmentioning

confidence: 99%

Microscopic Atom Optics: From Wires to an Atom Chip

Folman¹,

Krüger²,

Schmiedmayer³

et al. 2002

Advances in Atomic, Molecular, and Optical Physics

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“…The second example involves the measurement by Andersson et al (2000) of the threshold energy at the opening of an excited state channel in the photodetachment of K À . The coaxial beam apparatus used by Hanstorp and his co-workers at Chalmers University of Technology is shown in Fig.…”

Section: Article In Pressmentioning

confidence: 99%