174
C. H. Pyeon
Fig. 6.20 Measured γ-ray
spectrum of 237 Np capture
reaction rates at subcritical
state (Ref. [5])
960
980
1000
1020
1040
200
300
400
500
600
Energy [keV]
Counts [Arbitrary units]
984.45 keV
1028.53 keV
237 Np
1025.87 keV
Table 6.8 Main characteristics of 237 Np and 197 Au capture reactions (Ref. [5])
Reaction
Half-life
γ-ray energy (keV)
Emission rate (%)
237 Np (n, γ) 238 Np
2.177 d
984.45
27.8
1025.87
9.6
1028.53
20.3
197 Au (n, γ) 198 Au
2.69517 d
411.80
95.5
Table 6.9 Comparison of the results of capture reaction rate ratio at subcritical and critical states
(Ref. [5])
Reaction rate ratio
Subcritical state
Critical state (Ref. [1])
237 Np/ 197 Au
1.88 ± 0.28
1.88 ± 0.08
in the KUCA-A hard spectrum cores. In future studies, nuclear transmutation of
MA by ADS is foreseen for implementation at KUCA, with the combined use of
a hard spectrum core and 100 MeV protons, on the basis of measured and calculated methodologies obtained in the current at critical core conditions irradiation
experiments on MA.
100 MeV proton beams were injected onto the Pb–Bi target, and subcritical irradiation experiments of MA (
237 Np and
241 Am) by ADS were carried out with the
use of high-energy neutrons generated by the interaction of 100 MeV protons and
the Pb–Bi target. In the subcritical irradiation experiments, fission reaction rates of
237 Np and
241 Am were acquired by the electric signals of fission fragments obtained
from the BTB fission chamber, and capture reaction rates of
237 Np were obtained by
the measurement of the γ-ray spectrum after the irradiation. Here, for the first time,
nuclear transmutation of
237 Np and
241 Am was soundly implemented by ADS that
comprises a subcritical core and a 100 MeV proton accelerator with Pb–Bi target,
and demonstrated at KUCA through the experimental results of the reaction rate ratio
C. H. Pyeon
Fig. 6.20 Measured γ-ray
spectrum of 237 Np capture
reaction rates at subcritical
state (Ref. [5])
960
980
1000
1020
1040
200
300
400
500
600
Energy [keV]
Counts [Arbitrary units]
984.45 keV
1028.53 keV
237 Np
1025.87 keV
Table 6.8 Main characteristics of 237 Np and 197 Au capture reactions (Ref. [5])
Reaction
Half-life
γ-ray energy (keV)
Emission rate (%)
237 Np (n, γ) 238 Np
2.177 d
984.45
27.8
1025.87
9.6
1028.53
20.3
197 Au (n, γ) 198 Au
2.69517 d
411.80
95.5
Table 6.9 Comparison of the results of capture reaction rate ratio at subcritical and critical states
(Ref. [5])
Reaction rate ratio
Subcritical state
Critical state (Ref. [1])
237 Np/ 197 Au
1.88 ± 0.28
1.88 ± 0.08
in the KUCA-A hard spectrum cores. In future studies, nuclear transmutation of
MA by ADS is foreseen for implementation at KUCA, with the combined use of
a hard spectrum core and 100 MeV protons, on the basis of measured and calculated methodologies obtained in the current at critical core conditions irradiation
experiments on MA.
100 MeV proton beams were injected onto the Pb–Bi target, and subcritical irradiation experiments of MA (
237 Np and
241 Am) by ADS were carried out with the
use of high-energy neutrons generated by the interaction of 100 MeV protons and
the Pb–Bi target. In the subcritical irradiation experiments, fission reaction rates of
237 Np and
241 Am were acquired by the electric signals of fission fragments obtained
from the BTB fission chamber, and capture reaction rates of
237 Np were obtained by
the measurement of the γ-ray spectrum after the irradiation. Here, for the first time,
nuclear transmutation of
237 Np and
241 Am was soundly implemented by ADS that
comprises a subcritical core and a 100 MeV proton accelerator with Pb–Bi target,
and demonstrated at KUCA through the experimental results of the reaction rate ratio