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Revista mexicana de física

Print version ISSN 0035-001X

Rev. mex. fis. vol.54 n.1 México Feb. 2008

 

Investigación

 

Hydrogen atom in a magnetic field: electromagnetic transitions of the lowest states

 

J.C. López Vieyra and H.O. Pilón

 

Instituto de Ciencias Nucleares, UNAM, Apartado Postal 70–543, 04510 México, e–mail: vieyra@nucleares.unam.mx, horop@nucleares.unam.mx

 

Recibido el 29 de septiembre de 2007
Aceptado el 5 de diciembre de 2007

 

Abstract

A detailed study of the lowest states 1s0, 2p–1, 2p0 of the hydrogen atom placed in a magnetic field B (0 — 4.414 × 1013 G) and their electromagnetic transitions (1s0 2p–1 and 1s0 2p0) is carried out in the infinite–proton–mass (Born–Oppenheimer) approximation. The variational method is used with a physically motivated recipe to design simple trial functions applicable to the whole domain of magnetic fields. We show that the proposed functions yield very accurate results for the ionization (binding) energies. Dipole and oscillator strengths are in good agreement with results by Ruder et al. [10], although we observe deviations of up to ~ 30% for the oscillator strength of the linearly polarized electromagnetic transition 1s0 2p0 at strong magnetic fields B 1000 a.u.

Keywords: hydrogen atom; magnetic fields; transitions.

 

Resumen

Se lleva a cabo un estudio detallado de los estados mas bajos 1s0, 2p–1, 2p0del átomo de hidrógeno en un campo magnético B (0 — 4.414 × 1013 G) y sus transiciones electromagnéticas (1s0 2p–1 and 1s0 2p0) en la aproximación de masa del protón infinita (Born–Oppeneimer). Se usa el método variacional con una receta físicamente motivada para diseñar funciones de prueba simples aplicables a el rango completo de campos magnéticos. Mostramos que las funciones propuestas arrojan resultados muy precisos para las energías de ionización (energías de amarre). Las fuerzas de dipolo y de oscilador están en buen acuerdo con los resultados de Ruder et al. [10] aunque observamos desviaciones de hasta ~ 30% para la fuerza de oscilador de la transición electromagnética linealmente polarizada 1s0 2p0 para campos magnéticos B 1000 a.u.

Descriptores: átomo de hidrógeno; campos magnéticos; transiciones.

 

PACS: 31.15.Pf; 31.10.+z; 32.60.+i; 97.10.Ld

 

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