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Prospects for measuring the 229Th isomer energy using a metallic magnetic microcalorimeter.
Kazakov, G A; Schauer, V; Schwestka, J; Stellmer, S P; Sterba, J H; Fleischmann, A; Gastaldo, L; Pabinger, A; Enss, C; Schumm, T.
Afiliación
  • Kazakov GA; Wolfgang Pauli Institute, Univ. Wien - UZA 4 Nordbergstrasse 15, A, 1090 Vienna, Austria ; Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, Stadionallee 2, 1020 Vienna, Austria.
  • Schauer V; Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, Stadionallee 2, 1020 Vienna, Austria.
  • Schwestka J; Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, Stadionallee 2, 1020 Vienna, Austria.
  • Stellmer SP; Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, Stadionallee 2, 1020 Vienna, Austria.
  • Sterba JH; Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, Stadionallee 2, 1020 Vienna, Austria.
  • Fleischmann A; Kirchhoff-Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany.
  • Gastaldo L; Kirchhoff-Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany.
  • Pabinger A; Kirchhoff-Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany.
  • Enss C; Kirchhoff-Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany.
  • Schumm T; Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, Stadionallee 2, 1020 Vienna, Austria.
Nucl Instrum Methods Phys Res A ; 735: 229-239, 2014 Jan 21.
Article en En | MEDLINE | ID: mdl-25844000
The Thorium-229 isotope features a nuclear isomer state with an extremely low energy. The currently most accepted energy value, 7.8±0.5 eV, was obtained from an indirect measurement using a NASA x-ray microcalorimeter with an instrumental resolution 26 eV. We study, how state-of-the-art magnetic metallic microcalorimeters with an energy resolution down to a few eV can be used to measure the isomer energy. In particular, resolving the 29.18 keV doublet in the γ-spectrum following the α-decay of Uranium-233, corresponding to the decay into the ground and isomer state, allows to measure the isomer transition energy without additional theoretical input parameters, and increase the energy accuracy. We study the possibility of resolving the 29.18 keV line as a doublet and the dependence of the attainable precision of the energy measurement on the signal and background count rates and the instrumental resolution.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nucl Instrum Methods Phys Res A Año: 2014 Tipo del documento: Article País de afiliación: Austria Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nucl Instrum Methods Phys Res A Año: 2014 Tipo del documento: Article País de afiliación: Austria Pais de publicación: Países Bajos