Ionisierungsenergien von Atomen und Atomionen

Finkelnburg, Wolfgang; Humbach, W.

doi:10.1007/bf00621525

Cited by 98 publications

(32 citation statements)

References 4 publications

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“…To the best of our knowledge no experimental measurement of this quantity has been published before. Two values sometimes cited as "experimental" are actually the results of extrapolations based on spectral data from other elements: 11.5(1.0) eV [25] and 11.9(1) eV [26], and are in agreement with our observations.…”

Section: +supporting

confidence: 91%

Energy levels of Th+between 7.3 and 8.3 eV

et al. 2013

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Using resonant two-step laser excitation of trapped 232 Th + ions, we observe 43 previously unknown energy levels within the energy range from 7.3 to 8.3 eV. The high density of states promises a strongly enhanced electronic bridge excitation of the 229m Th nuclear state that is expected in this energy range. From the observation of resonantly enhanced three-photon ionization of Th + , the second ionization potential of thorium can be inferred to lie within the range between 11.9 and 12.3 eV. Pulsed laser radiation in a wide wavelength range from 237 to 289 nm is found to provide efficient photodissociation of molecular ions that are formed in reactions of Th + with impurities in the buffer gas, leading to a significantly increased storage time for Th + in the ion trap.

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Section: +supporting

confidence: 91%

Energy levels of Th+between 7.3 and 8.3 eV

et al. 2013

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“…For scattered spectra of the elements S v through Zn xix, the table of Lotz, [116], has been quoted. For larger atomic numbers, the entries in brackets are from the table of Finkelnburg and Humbach, [65]. No attempt has been made, however, to quote all such calculated values.…”

Section: Contentsmentioning

confidence: 99%

Ionization potentials and ionization limits derived from the analyses of optical spectra

Moore¹

1970

275

236

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“…Of all the naturally occurring elements, At is the only one whose IP has not been experimentally deduced. However, the IP(At) had been calculated through the use of various theoretical treatments101112131415.…”

mentioning

confidence: 99%

“…Early extrapolations from the IP data for neighbouring elements gave values of IP(At) from 9.2 to 10.4 eV10111213, however, recent, more precise theoretical treatments1415 cluster around 9.3 eV (Table 1). Regarding the prediction of IPs of heavier elements and in particular the superheavy elements, the inclusion of relativistic and correlation effects are of major importance.…”

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confidence: 99%

Measurement of the first ionization potential of astatine by laser ionization spectroscopy

et al. 2013

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The radioactive element astatine exists only in trace amounts in nature. Its properties can therefore only be explored by study of the minute quantities of artificially produced isotopes or by performing theoretical calculations. One of the most important properties influencing the chemical behaviour is the energy required to remove one electron from the valence shell, referred to as the ionization potential. Here we use laser spectroscopy to probe the optical spectrum of astatine near the ionization threshold. The observed series of Rydberg states enabled the first determination of the ionization potential of the astatine atom, 9.31751(8) eV. New ab initio calculations are performed to support the experimental result. The measured value serves as a benchmark for quantum chemistry calculations of the properties of astatine as well as for the theoretical prediction of the ionization potential of superheavy element 117, the heaviest homologue of astatine.

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Ionisierungsenergien von Atomen und Atomionen

Cited by 98 publications

References 4 publications

Energy levels of Th+between 7.3 and 8.3 eV

Energy levels of Th+between 7.3 and 8.3 eV

Ionization potentials and ionization limits derived from the analyses of optical spectra

Measurement of the first ionization potential of astatine by laser ionization spectroscopy

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