Near-coincident K-line and K-edge energies as ionization diagnostics for some high atomic number plasmas

作者：Pereira N R^*; Weber B V; Phipps D G; Schumer J W; Seely J F; Carroll J J; Vanhoy J R; Slabkowska K; Polasik M

来源：Physics of Plasmas, 2012, 19(10): 102705.

DOI：10.1063/1.4759497

For some high atomic number atoms, the energy of the K-edge is tens of eVs higher than the K-line energy of another atom, so that a few eV increase in the line's energy results in a decreasing transmission of the x-ray through a filter of the matching material. The transmission of cold iridium's similar or equal to 63: 287 keV K alpha(2) line through a lutetium filter is 7% lower when emitted by ionized iridium, consistent with an energy increase of Delta epsilon similar or equal to 10 +/- 1 eV associated with the ionization. Likewise, the transmission of the K beta(1) line of ytterbium through a near-coincident K-edge filter changes depending on plasma parameters that should affect the ionization. Systematic exploration of filter-line pairs like these could become a unique tool for diagnostics of suitable high energy density plasmas.

• 出版日期2012-10