Abstract
Thin film structures incorporating metallic superconducting layers and tunnel junctions can be configured as low-energy X-ray spectrometers. We present results obtained when low-energy X-rays are absorbed in niobium films coupled to aluminum layers that serve as quasiparticle traps in an Nb/Al/Al2O3/Al/Nb tunnel junction X-ray detector. The linearity of the pulse height as a function of energy is discussed along with the energy dependence of the observed resolution and its relation to the broadening mechanisms. A resolution of 14 eV at 1 keV has been measured with our detector cooled to 03 K.
Original language | English (US) |
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Pages (from-to) | 3034-3037 |
Number of pages | 4 |
Journal | IEEE Transactions on Applied Superconductivity |
Volume | 5 |
Issue number | 2 |
DOIs | |
State | Published - Jan 1 1995 |
Externally published | Yes |
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Physics and Astronomy (miscellaneous)