Interpretation of the spectrum of Pb(II). Theoretical transition probabilities and lifetimes

Colón Hernández, Cristóbal and Alonso Medina, Aurelia (2001). Interpretation of the spectrum of Pb(II). Theoretical transition probabilities and lifetimes. "Canadian Journal of Physics", v. 79 (n. 7); pp. 999-1009. ISSN 0008-4204. https://doi.org/10.1139/cjp-79-7-999.

Description

Title: Interpretation of the spectrum of Pb(II). Theoretical transition probabilities and lifetimes
Author/s:
  • Colón Hernández, Cristóbal
  • Alonso Medina, Aurelia
Item Type: Article
Título de Revista/Publicación: Canadian Journal of Physics
Date: August 2001
ISSN: 0008-4204
Volume: 79
Subjects:
Faculty: E.U.I.T. Industrial (UPM)
Department: Física Aplicada [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

(ENG)Radiative transition probabilities for 190 lines arising from the ns ²S₁/₂, np ²P₁/₂,₃/₂, nd ²D₃/₂,₅/₂, nf ²F₅/₂,₇/₂, and 6p² (⁴P₁/₂,₃/₂,₅/₂, ²D₃/₂,₅/₂, ²P₁/₂,₃/₂, and ²S₁/₂) levels of Pb(II) have been calculated. Lifetimes of the above mentioned levels have been determined from the present transition probabilities. These values were obtained in intermediate coupling (IC) and using ab initio relativistic Hartree–Fock calculations. For the IC calculations, we use the standard method of least-square fitting of experimental energy levels by means of computer codes from Cowan. The results of calculations for radiative transition probabilities and excited states lifetimes are presented and compared with the experimental results present in the literature and with other theoretical values. There is generally good agreement between our values and the experimental data available. Analysis of the interaction shows that the level ⁴P₅/₂ of the 6s6p² configuration presents a large contribution to the ²D₅/₂ level of the 6s²6d configuration. This result explains the good agreement between our result and the experimental values obtained to the observed as the 6s6p² ⁴P₅/₂ – 6s²5f²F₇/₂ dipole-forbidden transition. (FRE) Nous avons calculé les probabilités de transition radiative provenant des niveaux de Pb(II) ns ²S₁/₂, np ²P₁/₂,₃/₂, nd ²D₃/₂,₅/₂, nf ²F₅/₂,₇/₂, and 6p² (⁴P₁/₂,₃/₂,₅/₂, ²D₃/₂,₅/₂, ²P₁/₂,₃/₂, and ²S₁/₂). Les demi-vies sont évaluées à partir de ces probabilités. Les valeurs numériques ont été obtenues de deux façons, utilisant l’approche du couplage intermédiaire (I.C.) et un calcul Hartree–Fock relativiste complet. En I.C., nous utilisons l’approche habituelle d’ajustement moindre carré des niveaux à des valeurs expérimentales en utilisant le programme de Cowan. Les résultats des calculs sont comparés aux valeurs expérimentales trouvée dans la littérature scientifique ainsi qu’à d’autres valeurs théoriques. L’accord est généralement très bon entre nos résultats et les valeurs expérimentales. Une analyse des interactions montre que le niveau ⁴P₅/₂ de la configuration 6s6p² a une contribution importante du niveau ²D₅/₂ de la configuration 6s²6d. Ce résultat explique le bon accord entre nos résultats et les valeurs expérimentales pour la transition dipolaire interdite 6s6p² ⁴P₅/₂ – 6s²5f²F₇/₂.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainMAT97-0697-C02-02UnspecifiedFernández Martínez, FranciscoNuevos pigmentos inorgánicos basados en tierras raras de interés tecnológico y ecológico

More information

Item ID: 56546
DC Identifier: http://oa.upm.es/56546/
OAI Identifier: oai:oa.upm.es:56546
DOI: 10.1139/cjp-79-7-999
Official URL: https://www.nrcresearchpress.com/doi/10.1139/p01-060#.XYo5LlUzaUk
Deposited by: Memoria Investigacion
Deposited on: 26 Sep 2019 08:22
Last Modified: 30 Sep 2019 09:01
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