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S. M. Sadetsky

Publications and source records attributed to S. M. Sadetsky.

2 recordsLinked to original sources
arXiv2002

Search for the Radiative Capture d+d->^4He+γReaction from the ddμMuonic Molecule State

A search for the muon catalyzed fusion reaction dd --> ^4He +γin the ddμmuonic molecule was performed using the experimental μCF installation TRITON and NaI(Tl) detectors for γ-quanta. The high pressure target filled with deuterium at temperatures from 85 K to 800 K was exposed to the negative muon beam of the JINR phasotron to detect γ-quanta with energy 23.8 MeV. The first experimental estimation for the yield of the radiative deuteron capture from the ddμstate J=1 was obtained at the level n_γ\leq 2\times 10^{-5} per one fusion.

nucl-ex↗
arXiv2002

Precise Measurement of Muon Capture on the Proton

The aim of the MuCap experiment is a 1% measurement of the singlet capture rate Lambda_S for the basic electro-weak reaction mu + p -> n + nu_mu. This observable is sensitive to the weak form-factors of the nucleon, in particular to the induced pseudoscalar coupling constant g_P. It will provide a rigorous test of theoretical predictions based on the Standard Model and effective theories of QCD. The present method is based on high precision lifetime measurements of mu^- in hydrogen gas and the comparison with the free mu^+ lifetime. The mu^- experiment will be performed in ultra-clean, deuterium-depleted H_2 gas at 10 bar. Low density compared to liquid H_2 is chosen to avoid uncertainties due to ppmu formation. A time projection chamber acts as a pure hydrogen active target. It defines the muon stop position in 3-D and detects rare background reactions. Decay electrons are tracked in cylindrical wire-chambers and a scintillator array covering 75% of 4 pi.

nucl-ex↗