Treating nuclear waste, in particular long-lived fission products (LLFPs), remains a worldwide problem for the future long-term sustainability of nuclear energy. A promising solution uses nuclear transmutation reactions to convert LLFPs into stable and short-lived nuclear matter for simpler, safer storage. Transmutation studies typically use neutron-induced fission, however, the LLFP Zr (half-life ~ 10 years) poses the challenge that stable Zr isotopes in the waste, namely Zr and Zr, may be transformed into Zr by neutron capture. Consequently, transmuting Zr by neutron capture is not practical. An alternative transmutation process uses deuteron-induced pre-equilibrium reactions on Zr, but there’s a lack of cross-section data at energies below 50 MeV/u. To address this knowledge gap, the Zr+d pre-equilibrium cross-sections were measured at ~ 30 MeV/u as part of the ImPACT program using the BigRIPS-OEDO beamline at the RIBF in RIKEN, Japan. A radioactive Zr beam was produced and separated by BigRIPS. Using OEDO the beam was decelerated and focused onto the cryogenically cooled deuterium gas target. Reaction products were momentum-analyzed by part of the SHARAQ spectrometer and then identified using the Bρ-dE-range method. This poster presents the experimental procedure and preliminary results.
Dr
Jongwon Hwang
(Center for Nuclear Study, University of Tokyo)
Masanori Dozono
(Kyoto University)
Nobu Imai
(CNS)
Shin'ichiro Michimasa
(Center for Nuclear Study, the Univ. of Tokyo)
Dr
Toshiyuki Sumikama
(RIKEN Nishina Center)
Dr
N. Chiga
(RIKEN Nishina Center)
Prof.
Shinsuke OTA
(RCNP, Osaka University)
Olga Beliuskina
(CNS)
Seiya Hayakawa
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