Characteristics of Nb/Al superconducting tunnel junctions fabricated using ozone gas
Ukibe Masahiro†, Fujii Go, Ohkubo Masataka
       
X-ray spectrum of an STJ in the array for measuring fluorescent x-rays from the x-ray tube. The C-K α , O-K α , and Fe-L α x-rays in the spectrum were emitted from a carbon compound target, oxide in the carbon compound target, and iron in the Al plate, respectively. The x-ray signals from approximately 700–900 ch correspond to bremsstrahlung x-ray photons generated in the Al plate of the target.