Peak identification of L X-ray spectra of elemental Np and U

Makoto Maeda, Keisuke Maehata, Naoko Iyomoto, Kenji Ishibashi, Koji Takasaki, Keisuke Nakamura, Katsunori Aoki, Kazuhisa Mitsuda, Keiichi Tanaka, Yoshihiro Yamanaka

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The L X-ray photons emitted by transuranic (TRU) elements are expected to be useful for developing nondestructive TRU monitors. Energy spectra of L X-rays emitted by 241Am, 238Pu and 239Pu sources were measured by a transition edge sensor (TES) microcalorimeter, which allowed precise peak identification with high energy resolution. In the measurements using the TES microcalorimeter, the full width at half-maximum energy resolution was 62.6 eV at 17.222 keV for 239Pu source, 62.5 eV at 17.222 keV for 238Pu source and 60.9 eV at 17.751 keV for 241Am source. This study demonstrates the separation of 241Am and plutonium isotopes by L X-ray spectroscopy using a TES microcalorimeter.

Original languageEnglish
Pages (from-to)509-513
Number of pages5
Journaljournal of nuclear science and technology
Issue number4
Publication statusPublished - Apr 3 2015

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering


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