Serveur d'exploration sur le thulium

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Observation and interpretation of the Tm3+ free ion spectrum

Identifieur interne : 001615 ( Main/Exploration ); précédent : 001614; suivant : 001616

Observation and interpretation of the Tm3+ free ion spectrum

Auteurs : A. Meftah [France] ; J.-F. Wyart [France] ; N. Champion [France] ; W.-U. L. Tchang-Brillet [France]

Source :

RBID : Pascal:07-0460039

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English descriptors

Abstract

The emission spectrum of thulium produced by a vacuum spark source was observed in the wavelength range from 700 to 2320 Å on the 10.7 m normal-incidence vacuum ultraviolet spectrograph at the Paris-Meudon observatory. In the unknown spectrum of Tm IV, more than 760 lines have been identified for the first time as transitions between 157 levels of 4f115d, 33 levels of 4f116p, 9 levels of 4f116s and 10 levels of the 4f12 ground configuration. A parametric interpretation of the levels has been carried out using the Cowan codes. Configuration interaction effects are discussed, in particular with the core-excited configurations 5p54f13 and 5p54f125d. Radial Slater parameters derived from 4f12 levels are larger than those pertaining to trivalent Tm ions in compounds. A selection of 105 prominent lines is given.


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Le document en format XML

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<div type="abstract" xml:lang="en">The emission spectrum of thulium produced by a vacuum spark source was observed in the wavelength range from 700 to 2320 Å on the 10.7 m normal-incidence vacuum ultraviolet spectrograph at the Paris-Meudon observatory. In the unknown spectrum of Tm IV, more than 760 lines have been identified for the first time as transitions between 157 levels of 4f
<sup>11</sup>
5d, 33 levels of 4f
<sup>11</sup>
6p, 9 levels of 4f
<sup>11</sup>
6s and 10 levels of the 4f
<sup>12</sup>
ground configuration. A parametric interpretation of the levels has been carried out using the Cowan codes. Configuration interaction effects are discussed, in particular with the core-excited configurations 5p
<sup>5</sup>
4f
<sup>13</sup>
and 5p
<sup>5</sup>
4f
<sup>12</sup>
5d. Radial Slater parameters derived from 4f
<sup>12</sup>
levels are larger than those pertaining to trivalent Tm ions in compounds. A selection of 105 prominent lines is given.</div>
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