April 1, 2007 Journal article Open Access

Beck, B. R.; Becker, J. A.; Beiersdorfer, P.; Brown, G. V.; Moody, K. J.; Wilhelmy, J. B.; Porter, F. S.; Kilbourne, C. A.; Kelley, R. L.

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{
  "description": "The energy splitting of the 229Th ground-state doublet is measured to be 7.6+/-0.5 eV, significantly greater than earlier measurements. Gamma rays produced following the alpha decay of 233U (105 muCi) were counted in the NASA/electron beam ion trap x-ray microcalorimeter spectrometer with an experimental energy resolution of 26 eV (FWHM). A difference technique was applied to the gamma-ray decay of the 71.82 keV level that populates both members of the doublet. A positive correction amounting to 0.6 eV was made for the unobserved interband decay of the 29.19 keV state (29.19-->0 keV).", 
  "license": "https://creativecommons.org/publicdomain/zero/1.0/legalcode", 
  "creator": [
    {
      "@type": "Person", 
      "name": "Beck, B. R."
    }, 
    {
      "@type": "Person", 
      "name": "Becker, J. A."
    }, 
    {
      "@type": "Person", 
      "name": "Beiersdorfer, P."
    }, 
    {
      "@type": "Person", 
      "name": "Brown, G. V."
    }, 
    {
      "@type": "Person", 
      "name": "Moody, K. J."
    }, 
    {
      "@type": "Person", 
      "name": "Wilhelmy, J. B."
    }, 
    {
      "@type": "Person", 
      "name": "Porter, F. S."
    }, 
    {
      "@type": "Person", 
      "name": "Kilbourne, C. A."
    }, 
    {
      "@type": "Person", 
      "name": "Kelley, R. L."
    }
  ], 
  "headline": "Energy Splitting of the Ground-State Doublet in the Nucleus Th 229", 
  "image": "https://zenodo.org/static/img/logos/zenodo-gradient-round.svg", 
  "datePublished": "2007-04-01", 
  "url": "https://zenodo.org/record/1233955", 
  "@context": "https://schema.org/", 
  "identifier": "https://doi.org/10.1103/physrevlett.98.142501", 
  "@id": "https://doi.org/10.1103/physrevlett.98.142501", 
  "@type": "ScholarlyArticle", 
  "name": "Energy Splitting of the Ground-State Doublet in the Nucleus Th 229"
}