Measurement of the Photonuclear (γ,n) Reaction Cross Section for ¹²⁹I Using Bremsstrahlung Photons

Study on Effective Average (γ, n) Cross Section for89Y,90Zr,93Nb, and133Cs and (γ, 3n) Cross Section for99Tc

“…Our group already has successfully measured the effective average 129 I (, n) 128 I cross section using this nondestructive detection technique. 1) The nuclide of 99 Tc is a great concern because of its significant existence in long-lived fission waste and its potential health risk. It is generally soluble in water under geologic conditions and may migrate relatively quickly in common ground water, eventually entering the food chain.…”

Proposal for selective isotope transmutation of long-lived fission products using quasi-monochromatic γ-ray beams

“…However, we cannot find any measured (γ , n) reaction cross sections for the LLFPs except 129 I. The integrated (average) reaction cross section on 129 I was measured by using bremsstrahlung γ -rays generated by a high-peak power laser [28] and by an electron accelerator [29]. The cross section as a function of γ -ray energy was measured only by an LCS γ -ray beam at NewSUBARU [13].…”

Photo-transmutation based on resonance γ-ray source*

“…Transmutations of 129 I based on a laser-induced bremsstrahlung (LIB) source have been already performed experimentally in Germany, [2][3][4] UK, [5] and Japan. [6] Theoretical investigations have been done on LLFPs such as 126 Sn, [7,8] 107 Pd, [9] 93 Zr, [10] 90 Sr, [11] 135 Cs, [12][13][14] and 137 Cs. [15] An LCS γ-ray source can produce γ-rays in a wide energy range, which can be utilized to transmute LLFPs.…”