Measurement of (γ, n) reaction cross section for long-lived β-emitting radionuclide129I by using bremsstrahlung photons

Abul Kalam M.Lutfor Rahman, Shigeyuki Kuwabara, Kunio Kato, Hidehiko Arima, Nobuhiro Shigyo, Kenji Ishibashi, Jun Ichi Hori, Ken Nakajima, Tetsuo Goto, Mikio Uematsu

Research output: Contribution to journalArticle

Abstract

Many long-lived non-gamma emitting radioactive nuclei such as 129I, 14C and 93Zr are produced as wastes from nuclear fuel cycle facilities. They are called "difficult-to-measure" radio nuclei. Among them 129I is a long-lived β-emitting isotope with a half-life of 1.57 × 107 years. Iodine compounds are mobile in the vadose zone and groundwater and increase a significant long-term risk. Transmutation of 129I is a challenging issue in nuclear waste management and disposal. If 129I is transmuted into 128I (half life; 25 minutes), it can easily be measured by a Ge detector. However, the 129I(γ, n) reaction cross section has not been measured so far. In this study we have measured the inclusive 129I(γ, n)128I cross section by using bremsstrahlung photons. The bremsstrahlung photons were produced from a 30-MeV electron linac. Measured average activation cross section agrees with 12% deviation from the evaluated one in the IAEA photonuclear data library. Gamma and neutron fluxes for the (γ, n) and the (n, γ) reaction were also calculated by the EGS and the MCNP codes.

Original languageEnglish
Pages (from-to)329-332
Number of pages4
Journaljournal of nuclear science and technology
Volume45
DOIs
Publication statusPublished - Jan 1 2008

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bremsstrahlung
Iodine compounds
Photons
half life
Neutron flux
cross sections
Nuclear fuels
photons
Waste management
iodine compounds
Radioactive wastes
Waste disposal
waste management
Isotopes
waste disposal
Groundwater
transmutation
nuclei
nuclear fuels
Chemical activation

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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Measurement of (γ, n) reaction cross section for long-lived β-emitting radionuclide129I by using bremsstrahlung photons. / Rahman, Abul Kalam M.Lutfor; Kuwabara, Shigeyuki; Kato, Kunio; Arima, Hidehiko; Shigyo, Nobuhiro; Ishibashi, Kenji; Hori, Jun Ichi; Nakajima, Ken; Goto, Tetsuo; Uematsu, Mikio.

In: journal of nuclear science and technology, Vol. 45, 01.01.2008, p. 329-332.

Research output: Contribution to journalArticle

Rahman, Abul Kalam M.Lutfor ; Kuwabara, Shigeyuki ; Kato, Kunio ; Arima, Hidehiko ; Shigyo, Nobuhiro ; Ishibashi, Kenji ; Hori, Jun Ichi ; Nakajima, Ken ; Goto, Tetsuo ; Uematsu, Mikio. / Measurement of (γ, n) reaction cross section for long-lived β-emitting radionuclide129I by using bremsstrahlung photons. In: journal of nuclear science and technology. 2008 ; Vol. 45. pp. 329-332.
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AU - Arima, Hidehiko

AU - Shigyo, Nobuhiro

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