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Improved characteristics of the 22.5 keV (M1 + E2) nuclear transition in 149Sm

  • A. Kh. InoyatovEmail author
  • D. V. Filosofov
  • V. M. Gorozhankin
  • A. Kovalık
  • I. Adam
  • L. L. Perevoshchikov
  • M. Ryšavý
Regular Article - Experimental Physics

Abstract

The gamma ray and conversion electron spectra of the 22.5keV M1 + E2 nuclear transition depopulating the first excited level 5/2 in 149Sm were investigated in detail. A substantially improved value of 22500.2 ± 0.8 eV for the transition energy was determined that opens a possibility to establish an electron energy standard for the keV region based on the conversion electron lines of this transition. The E2 admixture parameter |δ(E2/M1)| = 0.0784 ± 0.0009 and the nuclear structure parameter λ = − 2 ± 10 were derived. The |δ(E2/M1)| and λ parameters were also obtained for all available experimental data and their mutual combination.

Keywords

Conversion Electron Nuclear Transition Gamma Line Electron Line Conversion Line 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • A. Kh. Inoyatov
    • 1
    • 2
    Email author
  • D. V. Filosofov
    • 1
  • V. M. Gorozhankin
    • 1
  • A. Kovalık
    • 1
    • 3
  • I. Adam
    • 1
    • 3
  • L. L. Perevoshchikov
    • 1
  • M. Ryšavý
    • 3
  1. 1.Laboratory of Nuclear ProblemsJINRDubna, Moscow RegionRussian Federation
  2. 2.Institute of Applied PhysicsNational UniversityTashkentRepublic of Uzbekistan
  3. 3.Nuclear Physics Institute of the ASCRŘež near PragueCzech Republic

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