X-Ray Detection by Superconducting Tunnel Junctions via ... - CiteSeerX
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X-Ray Detection by Superconducting Tunnel Junctions via ... - CiteSeerX
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X-Ray Detection by Superconducting Tunnel Junctions via Phonon Propagation in the Substrate.
A. Poelaert, C. Erd, A. Peacock, N. Rando, P. Verhoeve Astrophysics Division, Space Science Department, European Space Agency, ESTEC, Noordwijk, The Netherlands A.G. Kozorezov, J.K. Wigmore School of Physics and Chemistry, Lancaster University, Lancaster, United Kingdom November 1, 1995 Submitted for publication to Journal of Applied Physics.
Abstract The X-ray performance of Nb-Al-AlOx -Al-Nb superconducting tunnel junctions deposited on sapphire via X-ray absorption and phonon propagation in the substrate is studied for photons of energy 750 to 6000 eV. Two separate channels of phonon propagation can be identi ed, that of ballistic propagation of high frequency phonons, and that in which lower frequency phonons reach the STJ after di usive or multiple scattering at surfaces.
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1 Introduction Superconducting Tunnel Junctions (STJ) have provided X-ray detectors with good energy resolution (
