The effect of an external magnetic field on the L3 subshell fluorescence yields and level widths for Ta, W, Tl, Th and U at 59.54 keV photons
Department of Physics, Faculty of Arts and Sciences, Ataturk University, 25240 Erzurum, Turkey
Corresponding author: a email@example.com
Revised: 21 February 2007
Published online: 16 May 2007
The effect of an external magnetic field on the L3 subshell fluorescence yields (ω3) and level widths (ΓL3) for paramagnetic Ta, W, Tl, Th and U have been investigated using the 59.54 keV incident photon energy in the external magnetic field of intensities ±0.60 T. L3 X-ray fluorescence cross sections (σL3X) have been measured for the same elements. The measured ω3, ΓL3 and σL3X values for B = 0 are in good agreement with the theoretical values. It was observed that the values of σL3X and ω3 with the applied magnitude of the magnetic field in both directions show a decreasing trend for paramagnetic Ta, W, Tl, Th and U. Furthermore, in the presence of an external magnetic field, the values of ΓL3 show an increasing trend for the same elements. The results show that the atomic parameters such as spectral linewidth, radiation rates, photoionization cross section and fluorescence yield can change when the irradiation is conducted in a magnetic field.
PACS: 32.80.Hd – Auger effect and inner-shell excitation or ionization / 32.80.-t – Photon interactions with atoms / 32.70.-n – Intensities and shapes of atomic spectral lines
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2007