Superconducting aluminium tunnel junctions with indium absorbers for low-energy X-ray spectroscopy
Review articleOpen access

AbstractWe report here on studies of the preparation of and on measurement with an absorber-type tunnel junction detector (Al/Al2O3/Al/In) suitable for low-energy X-ray spectroscopy. With a 55Fe source of 6 keV the energy resolution was determined to be 3.3% at a temperature of 276 mK. The experiments indicate that mainly phonons with E ≥ 2ΔAl, generated in the indium absorbers, contribute to the observed detector signals.

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