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    • Keywords


      Photoionization; inner-shell vacancies; Fluorescent L shell X-rays; angular distribution

    • Abstract


      The angular dependence of emission intensity of L shell X-rays induced by 59.57 keV photons in Pb and U is investigated by measuring the normalized intensities of the resolved L X-ray peaks at different angles varying from 40° to 120°. It is observed that while Ll and Lα X-ray peaks (originating fromJ = 3/2 state) show some anisotropic angular distribution, the emission of Lβ and Lγ X-ray peaks is isotropic. The present results contradict the calculations of Co-oper and Zare (1969) that after photoionization of inner shell, the vacancy state has equal population of magnetic substates and the subsequent X-ray emission is isotropic but confirm the predictions of Fluggeet al (1972) that the atomic inner shell vacancies produced after photoionization are aligned and the x-ray emission from the filling of vacancies in state withJ ⩾ 3/2 is anisotropic.

    • Author Affiliations


      K S Kahlon1 K Shatendra1 2 K L Allawadhi1 B S Sood1

      1. Nuclear Science Laboratories, Department of Physics, Punjabi University, Patiala - 147 002, India
      2. Solid State Physics Laboratory, Lucknow Road, Delhi - 110 007, India
    • Dates

  • Pramana – Journal of Physics | News

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