Determination of the energy measurement accuracy for charged particles by their range in nuclear photoemulsion

Ranges of monochromatic muons in nuclear photoemulsion, produced in the ?? ?? ??? _?? decay, are measured by the coordinate method to determine their energy by the range. The variance of the muon energymeasured by this method ?? _?? = (0.11±0.01) MeV, which corresponds to the accuracy of the determination of the charged particle energy by the range in nuclear emulsion ??3.1%. The developed technique will allow electron energy measurements in the 2??-decay (??3 MeV)with an accuracy of (5?C6)%.     

Intergroup azimuthal correlations of secondary particles in the interaction between <Superscript>56</Superscript>Fe nuclei of momentum 2.5 GeV/<Emphasis Type="Italic">c</Emphasis> per nucleon and photoemulsion nuclei

Angular correlations between secondary particles emitted in the interaction between ⁵⁶Fe nuclei of momentum 2.5 GeV/c per nucleon and photoemulsion nuclei were measured. These secondaries are partitioned into four groups: s, g, b, and f. For particles from each pair of the above groups, the average values of the collinearity factor and of the asymmetry parameter, as well as the parameter η of the function α(1+η cos ε) approximating the distribution of azimuthal-angle differences ε, were calculated.     

Observation of the production of cumulative particles in nucleus-nucleus and neutrino-nucleus interactions

Experimental data on the emission of cumulative particles arising in the interaction of 2.5-GeV/c⁵⁶Fe nuclei (FeEm) and 10–200 GeV neutrinos (νEm) with photoemulsion nuclei are analyzed. The number of cumulative particles correlates with the emission of secondary charged particles in the (FeEm) and (νEm) interactions.     

Measurement of the sizes of a source of α particles from the collisions of relativistic 22Ne and 24Mg nuclei with photoemulsion nuclei

The correlation of two α particles has been measured. In the case of a one-dimensional parameterization of the correlation function, the size of the source of the α particles is R(α) = 2.84 ± 0.28_stat ± 0.23_sist fm. This result is compared to similar measurements for protons and deuterons.     

Observation of Electrons with Energies up to 180 keV Accompanying <Emphasis Type="Italic">μ</Emphasis><Superscript>+</Superscript> Decay

It is shown that during the stopping and decaying of positively charged muon (μ⁺) in a nuclear emulsion, there arises with a probability of about 10^?2 electron with energies between 10 and 180 keV. The energy spectrum and angular distribution of these electrons are measured. A hypothesis on the possible mechanism behind the appearance of electrons corresponding to μ⁺ decay is put forth.     

Observation of Migdal’s Effect in Nuclear Emulsions upon Muon Decay in Mesic Atoms

Physics of Atomic Nuclei - 2520 stops and interactions of $$\mu^{-}$$ mesons were observed in a nuclear emulsion. The energy spectra and angular distribution of Auger electrons accompanying...     

Charged Particles of Energy in Excess of Evaporation Energy from K−-Meson Absorption by Nuclei

It is shown that, upon the stopping of a negatively charged kaon and its absorption by a nucleus, there arise particles whose appearance does not comply with thermodynamic evaporation theory. An identification of these particles by various methods makes it possible to evaluate the nearly identical yields of ³H and ³He nuclei. This result may serve as an indication that direct reactions induced by interaction with ⁴He are observed in K⁻-meson absorption in nuclei.

     

Absorption of slow K− mesons in nuclear emulsion

The absorption of slow K^? mesons in nuclear emulsion through the mesonic and nonmesonic channels has been measured. It has been shown that K^? mesons are absorbed in the surface (diffuse) layer of a nucleus. The results are in qualitative agreement with theoretical calculations involving the mesonic and nonmesonic potentials of the absorption of kaons by light and heavy nuclei of nuclear emulsion.