EPJ Web of Conferences (Jan 2023)

Measurements of the Neutron Capture Cross Section of Am-243 with the ANNRI beamline, MLF/J-PARC

  • Kodama Yu,
  • Katabuchi Tatsuya,
  • Rovira Gerard,
  • Kimura Atsushi,
  • Nakamura Shoji,
  • Endo Shunsuke,
  • Nakano Hideto,
  • Sato Yaoki,
  • Hori Jun-ichi,
  • Shibahara Yuji,
  • Terada Kazushi

DOI
https://doi.org/10.1051/epjconf/202328401024
Journal volume & issue
Vol. 284
p. 01024

Abstract

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The neutron capture cross section of 243Am from thermal to 100 keV was measured using the Accurate Neutron-Nucleus Reaction Measurement Instrument (ANNRI) at the Japan Proton Accelerator Research Complex (J-PARC). The time-of-flight (TOF) method using a NaI(Tl) detector was employed in these measurements and the pulse-height weighting technique was used to derive the neutron capture yield. The preliminary cross section was determined by normalizing the results to JENDL-4.0 cross section data at the third resonance of 243Am. In the thermal energy, the preliminary result is in good agreement with the two latest experimental data measured by the TOF and the activation methods but higher than the evaluated values in JENDL-5.