MetroMMC: Electron-Capture Spectrometry with Cryogenic Calorimeters for Science and Technology

Research output: Contribution to journalArticleResearchpeer review

Authors

  • P. C.O. Ranitzsch
  • D. Arnold
  • J. Beyer
  • Lina Bockhorn
  • J. J. Bonaparte
  • C. Enss
  • K. Kossert
  • S. Kempf
  • M. Loidl
  • R. Mariam
  • O. J. Nähle
  • M. Paulsen
  • M. Rodrigues
  • M. Wegner

Research Organisations

External Research Organisations

  • Physikalisch-Technische Bundesanstalt PTB
  • Heidelberg University
  • Comision Nacional de Energia Atomica
  • Laboratoire National Henri Becquerel
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Details

Original languageEnglish
Pages (from-to)441-450
Number of pages10
JournalJournal of low temperature physics
Volume199
Issue number1-2
Early online date9 Dec 2019
Publication statusPublished - Apr 2020

Abstract

Accurate decay data of radionuclides are necessary for many fields of science and technology, ranging from medicine and particle physics to metrology. However, data that are in use today are mostly based on measurements or theoretical calculation methods that are rather old. Recent measurements with cryogenic detectors and other methods show significant discrepancies to both older experimental data and theory in some cases. Moreover, the old results often suffer from large or underestimated uncertainties. This is in particular the case for electron-capture (EC) decays, where only a few selected radionuclides have ever been measured. To systematically address these shortcomings, the European metrology project MetroMMC aims at investigating six radionuclides decaying by EC. The nuclides are chosen to cover a wide range of atomic numbers Z, which results in a wide range of decay energies and includes different decay modes, such as pure EC or EC accompanied by γ- and/or β+-transitions. These will be measured using metallic magnetic calorimeters (MMCs), cryogenic energy-dispersive detectors with high-energy resolution, low-energy threshold and high, adjustable stopping power that are well suited for measurements of the total decay energy and X-ray spectrometry. Within the MetroMMC project, these detectors are used to obtain X-ray emission intensities of external sources as well as fractional EC probabilities of sources embedded in a 4 π absorber. Experimentally determined nuclear and atomic data will be compared to state-of-the-art theoretical calculations which will be further developed within the project. This contribution introduces the MetroMMC project and in particular its experimental approach. The challenges in EC spectrometry are to adapt the detectors and the source preparation to the different decay channels and the wide energy range involved, while keeping the good resolution and especially the low-energy threshold to measure the EC from outer shells.

Keywords

    Electron-capture decay, Metallic magnetic calorimeter, Radionuclide metrology

ASJC Scopus subject areas

Cite this

MetroMMC: Electron-Capture Spectrometry with Cryogenic Calorimeters for Science and Technology. / Ranitzsch, P. C.O.; Arnold, D.; Beyer, J. et al.
In: Journal of low temperature physics, Vol. 199, No. 1-2, 04.2020, p. 441-450.

Research output: Contribution to journalArticleResearchpeer review

Ranitzsch, PCO, Arnold, D, Beyer, J, Bockhorn, L, Bonaparte, JJ, Enss, C, Kossert, K, Kempf, S, Loidl, M, Mariam, R, Nähle, OJ, Paulsen, M, Rodrigues, M & Wegner, M 2020, 'MetroMMC: Electron-Capture Spectrometry with Cryogenic Calorimeters for Science and Technology', Journal of low temperature physics, vol. 199, no. 1-2, pp. 441-450. https://doi.org/10.1007/s10909-019-02278-4
Ranitzsch, P. C. O., Arnold, D., Beyer, J., Bockhorn, L., Bonaparte, J. J., Enss, C., Kossert, K., Kempf, S., Loidl, M., Mariam, R., Nähle, O. J., Paulsen, M., Rodrigues, M., & Wegner, M. (2020). MetroMMC: Electron-Capture Spectrometry with Cryogenic Calorimeters for Science and Technology. Journal of low temperature physics, 199(1-2), 441-450. https://doi.org/10.1007/s10909-019-02278-4
Ranitzsch PCO, Arnold D, Beyer J, Bockhorn L, Bonaparte JJ, Enss C et al. MetroMMC: Electron-Capture Spectrometry with Cryogenic Calorimeters for Science and Technology. Journal of low temperature physics. 2020 Apr;199(1-2):441-450. Epub 2019 Dec 9. doi: 10.1007/s10909-019-02278-4
Ranitzsch, P. C.O. ; Arnold, D. ; Beyer, J. et al. / MetroMMC : Electron-Capture Spectrometry with Cryogenic Calorimeters for Science and Technology. In: Journal of low temperature physics. 2020 ; Vol. 199, No. 1-2. pp. 441-450.
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