Investigation of epitaxial niobium based superconducting tunnel junction detectors

S. Lemke, F. Hebrank, F. Fominaya, R. Gross, R. P. Huebener, N. Rando, A. van Dordrecht, P. Huebner, P. Videler, A. Peacock

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Superconducting Nb/AlAlOx/Nb tunnel junctions (STJs) with epitaxial niobium base electrode are investigated as weak x-ray detectors. The recorded x-ray spectra show a two peak structure that is attributed to the absorption of 6 keV x-rays in the two junction electrodes. Low Temperature Scanning Electron Microscopy (LTSEM) proves, that the high charge output peak of the x-ray spectra is associated with x-rays absorbed in the epitaxial niobium film. The significantly reduced charge output for events in the polycrystalline niobium electrode is found to be bias voltage dependent.

Original languageEnglish
Pages (from-to)1663-1664
Number of pages2
JournalPhysica B: Condensed Matter
Volume194-196
Issue numberPART 2
DOIs
StatePublished - 2 Feb 1994
Externally publishedYes

Fingerprint

Dive into the research topics of 'Investigation of epitaxial niobium based superconducting tunnel junction detectors'. Together they form a unique fingerprint.

Cite this