Spectroscopic measurement of L X-rays emitted by transuranium elements by using TES microcalorimeter

M. Maeda, K. Maehata, N. Iyomoto, K. Ishibashi, K. Takasaki, K. Nakamura, K. Aoki, K. Mitsuda, K. Tanaka

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Energy spectra of L X-rays emitted by 237Np and uranium isotopes progenies of 241Am and plutonium isotopes were measured by a transition edge sensor (TES) microcalorimeter for demonstration of peak separation with high energy resolution. L X-ray photons emitted by transuranium (TRU) elements can to be utilized for a nondestructive TRU monitor. Major L X-ray peaks are clearly distinguished in the energy spectrum of L X-rays obtained by the simultaneous measurement for radiation sources of 241Am and plutonium isotopes. The value of full width at half maximum energy resolution is 60.21 eV for a peak corresponding to Np L β1 X -rays of 17.751 keV in 241Am source measurement. Comparable energy resolutions were obtained in other experiments. This measurement demonstrated separation of 241Am and plutonium isotopes by L X-ray spectroscopy using TES microcalorimeter.

Original languageEnglish
Pages (from-to)1046-1052
Number of pages7
JournalJournal of Low Temperature Physics
Issue number5-6
Publication statusPublished - Sept 2014

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • General Materials Science
  • Condensed Matter Physics


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