241Am, 237Np and 129I radioactive targets were irradiated by proton beams with energy 0.66 GeV. The cross- sections of formation of 80, 53 and 86 residual nuclei from 241Am, 237Np and 129I are determined. The experimental results are compared with the theoretical cross-sections calculated by the cascade-evaporation model (CEM).
The burning of radioactive waste is investigated. Targets from 241 Am and 237 Np were irradiated with 0.66-GeV proton beams. The cross sections for the formation of 60 and 80 residual nuclei from 237 Np and 241 Am are determined. The experimental results are compared with the theoretical cross sections calculated by the cascade-evaporation model.
Experimental study on muon catalyzed dt fusion in a triple mixture of hydrogen isotopes (H/D/T) was carried out at the JINR phasotron. The measurements have been performed at various temperatures and densities with liquid and gaseous H/D/T mixtures. Results are presented for the main characteristics of the dt μ cycle. A reduction of the number of dt fusions is observed when hydrogen is added to the D/T mixture, This is mainly due to muon loss to the pt and pd cycles, which have a high sticking probability. We also observe an increase of the cycle rate when the temperature of the H/D/T mixture rises. This confirms the theoretical prediction.
The concentration dependence study of the formation rate of the muon molecules dtμ in equilibrium double D/T and triple H/D/T liquid mixtures of hydrogen isotopes requires an installation consisting of a target of volume 30 cm3 with helium cooling and a thermostabilization system. The temperature of the target, close to 22 K is fixed with an accuracy of 0.1 K.
Muon catalyzed dt fusion in dense D/T and H/D/T gas mixtures of hydrogen isotopes is studied by the MCF collaboration at JINR. The measurements were carried out with a high pressure target at the JINR phasotron in the temperature range 300-800 K at mixture densities \( \simeq 0.4{\text{ and }} \simeq {\text{0}}{\text{.8 LHD}}\). Tentative experimental results obtained by several analysis methods are presented.
Preliminary data are first presented for the measurements of effective parameters of MCF processes in dense D/T mixtures obtained by a novel method. Results are compared with the ones obtained by the “standard” method.
The ddµ molecule formation rates have been measured from the two hyperfine states of the dµ atom in the temperature range T=5–30 K. Results are consistent with the measurement of the TRIUMF group T=3 K and contradict theoretical predictions. This work was performed on the JINR phasotron (Dubna).
An installation is made to investigate the temperature and spin dependence of the ddu “meso”-molecular formation rate in deuterium in solid, liquid and gaseous phases. It is composed of a target cooled with helium of a volume equal to 280 cm3 and target thermostabilization and gas-handling systems. The temperature of the target in the range 5-40 K can be fixed with an accuracy of 0.2 K.
The original experimental method for further µCF study in double, D/T, and triple, H/D/T, mixtures of high density is considered. This method is the base of the international project sponsored by the ISTC.
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