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A pulse-height spectrum from a Mössbauer 57Co source registered with a superconducting tunnel detector

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Abstract

Pulse-height spectra from irradiation of superconducting tunnel detectors of an original design with quanta emitted by a Mössbauer 57Co source were recorded in the energy range 1–15 keV. The detectors have a layer structure of Ti/Nb/Al,AlOx/Al/Nb/NbN (with thicknesses of 30, 100, 8, 13, 150, and 30 nm, respectively), one active electrode, and one passive electrode (the signal of which is suppressed owing to the presence of a titanium sublayer). Thanks to the high activity of the source, a 14.4-keV γ line has been detected. The spectra obtained with 57Co and 55Fe sources are compared. The energy dependence of the detector response is determined using the positions of the fluorescence lines from construction materials and specially selected shields. The Mg, Al, SiK α, and Ag, InL α along with the MnK α, β , FeK α, β, 14.4-keV γ lines and niobium escape lines, were used for this purpose. The possible reasons for a strong nonlinearity of this dependence are pointed out.

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Authors and Affiliations

  1. Skobeltsyn Institute of Nuclear Physics, Moscow State University, Vorob’evy gory 1, str. 2, Moscow, 119992, Russia

    M. G. Kozin, I. L. Romashkina, S. A. Sergeev & L. V. Nefedov

  2. Institute of Radio Engineering and Electronics, Russian Academy of Sciences, ul. Mokhovaya 11, corp. 7, Moscow, 125009, Russia

    V. P. Koshelets & L. V. Filippenko

Authors
  1. M. G. Kozin
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  2. I. L. Romashkina
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  3. S. A. Sergeev
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  4. L. V. Nefedov
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  5. V. P. Koshelets
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  6. L. V. Filippenko
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Additional information

Original Russian Text © M.G. Kozin, I.L. Romashkina, S.A. Sergeev, L.V. Nefedov, V.P. Koshelets, L.V. Filippenko, 2006, published in Pribory i Tekhnika Eksperimenta, 2006, No. 6, pp. 135–139.

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Kozin, M.G., Romashkina, I.L., Sergeev, S.A. et al. A pulse-height spectrum from a Mössbauer 57Co source registered with a superconducting tunnel detector. Instrum Exp Tech 49, 868–871 (2006). https://doi.org/10.1134/S0020441206060182

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  • DOI: https://doi.org/10.1134/S0020441206060182

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