Yu. V. Smirenin

Experimental investigation of the muon catalyzed dd-fusion

Abstract Using an ionization chamber as a sensitive target of deuterium at 91.6 atm pressure the following parameters of the muon catalyzed dd-fusion have been measured at room temperature: the molecule formation rate Λddμ0=(2.76±0.08) × 102s−; the muon sticking coefficient ω dd , 3 He =0.126±0.004 ; the ratio of the yields R= Y( d+d → 3 He+n ) Y( d+d → 3 H+p ) =1.3±0.04 ; and the muon transfer rate Λ d 0 , 4 He =(3.2±0.3)×10 8 s −1 . The presented rates Λddμ0 and Λd0,4He are normalization to the liquid hydrogen density.

A precision measurement of nuclear muon capture on 3He

In this article we report the results of an experiment performed in 1993 at PSI. The goal was to determine the absolute rate of nuclear muon capture by3He. In the experiment we used a new technique recently developed at Gatchina. As a preliminary result from this experiment we obtainedλc=(1496±3(stat)-3(syst)) s−1.

Experimental survey of the sticking problem in muon catalyzed dt fusion

The “sticking” process dtμ → αμ + n, which constitutes the most severe limit to the number of fusions which a muon can catalyze, is reviewed. Many attempts were made to determine by calculations and measurements the probability for initial stickingωs0 (immediately after dtμ fusion) and for final stickingωs (after the αμ came to rest). Previous results based on neutron disappearance rates and on the observation of αμ-X-rays were controversial and also in some disagreement with theory. New data are reported from PSI on direct observation of final sticking, using a setup with the St. Petersburg ionization chamber. These data mark a significant improvement in reliability and may clarify questions concerning previous discrepancies. The new results isωs∼(0.56±0.04)%, lower than the theory predictionωs=(0.65±0.03)%, at medium density.

Muon catalyzed fusion in deuterium gas

AbstractWe present the results of an experiment performed at PSI to investigate muon catalyzed fusion in pure deuterium gas of 5% density (LHD) at temperatures ranging from 28 K to 350 K. Using a new high pressure ionization chamber the reactions dd → n + 3He and dd → p+t were observed with 100% detection efficiency. The rates of dμd formation were measured with the absolute precision of 1% and the μd spin-flip rates with 0.5%. The temperature dependence of molecular formation and spin-flip rates display pronounced resonance structures. A preliminary fit based on the Vesman mechanism of resonant muonic molecule formation was carried out yielding a dd fusion rate of 3.5·108 s-1 and a hfs splitting energy

Novel method for MCF study in a dense D/T mixture, first experimental results

\delta \varepsilon _{d\mu d}

New precision measurements of dµd fusion

of 24.3 meV, both in good agreement with the theory.

Investigation of the parameters of muon-catalyzed fusion in double D/T mixture at high temperature and density

AbstractMuon 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