Observation of the gamma resonance of a long-lived <Superscript>109<Emphasis Type="Italic">m</Emphasis></Superscript>Ag isomer using a gravitational gamma-ray spectrometer

Experiments confirming the previous data on the small real width of the γ resonance of ^109m Ag have been performed with a gravitational gamma-ray spectrometer. The achieved resolution is eight orders of magnitude higher than that of Mössbauer spectrometers using gamma rays from a ⁵⁷Fe nuclide. The theoretically predicted broadening of the Mössbauer gamma line of ^109m Ag by five orders of magnitude (due to the dipole-dipole interaction between the magnetic moments of neighboring nuclei) has not been observed.     

A study of the nuclear-medium influence on neutral-strange-particle production in deep-inelastic neutrino scattering

The influence of nuclear effects on the production of neutral strange particles (V ⁰) is investigated using the data obtained with SKAT propane-freon bubble chamber irradiated in the neutrino beam (with E _v =3−30 GeV) at the Serpukhov accelerator. The mean multiplicity of V ⁰ particles in nuclear interactions, , is found to exceed significantly that in “quasideuteron” interactions, . The ratio of is larger than that for π⁻ mesons, . It is shown that the multiplicity gain of V ⁰ particles can be explained by intranuclear interactions of produced pions. The text was submitted by the authors in English.     

Experiments on the gravity effect on the109Ag gamma resonance

The temperature dependence of the ¹⁰⁹Ag γ-ray self-absorption was investigated for the horizontal and vertical directions of emission. The source was a single-crystal silver plate containing atoms of parent radionuclide ¹⁰⁹Cd. Gamma-radiation of this γ-source and that of the monitoring γ-source, ⁵⁷Co, were registered by a pair of Ge(Li)-detectors. As a result of cooling the source from 77 K to ~12 K a relative decrease was observed of the intensity of the horizontally emitted γ-rays equal to 0.00064±0.00044. For the vertical direction the corresponding intensity change turned out to be -0.00047±0.00051. Although these data, as one would see, give some evidence for the possible effect of the gravitation on the resonant γ-ray absorption, future measurements must show if these results aren’t a consequence of any apparatus effect. The ways for developments in this study are discussed and some hindrances are considered. This revised version was published online in August 2006 with corrections to the Cover Date.     

Light-Induced Dynamic Backscattering of Laser Pulses in a Randomly Inhomogeneous Media

Backscattering of high-power laser pulses in a randomly inhomogeneous media containing microparticles suspended in a liquid is treated theoretically. Relationships for the temporal correlation function of multiply scattered radiation, which account for acceleration of particles in the field of optical radiation, sure derived for the first time. A new method for determination of particle velocities based on correlation properties of scattered light is proposed.     

Development of an optical communication channel prototype with a HTSC bolometric detector

An optical communication channel prototype with a detector based on a high-temperature superconducting bolometer has been developed for controlling complex physical facilities: accelerators, reactors, high-power generators, etc.     

Study ofD *+ and search forD **0 production by neutrinos in BEBC

Data from BEBC experiments are combined to provide large statistics for neutrino interactions. ChargedD ^* mesons are produced in (1.22±0.25)% of neutrino and (1.01±0.31)% of antineutrino charged current interactions. The mean fraction of the hadronic laboratory energy taken by theD ^*+ in these events is 0.59±0.03±0.08. Less than 18% of all chargedD ^* mesons from (anti)neutrino interactions are found to be daughters ofD ^**0 (at the 90% confidence level).     

Cross-section measurements of single pion production in charged current neutrino and antineutrino interactions

All six exclusive single pion production processes from neutrino and antineutrino charged current interactions are studied in the energy range between 3 and 30 GeV. Using a quark model for single pion production from Rein and Sehgal we fitted the aximal mass parameter from total cross sections and compare the results with values from other experiments and the world-averages.     

Development of a hydrophilic interaction high-performance liquid chromatography method for the determination of glycine in formulations of therapeutic immunoglobulins

Analytical and Bioanalytical Chemistry - In the study presented, a simple analytical method for the direct determination of glycine in immunoglobulins by hydrophilic interaction liquid...     

Conformational study of chiral cisoid enamino ketones

A study of a number of chiral cisoid cyclic enamino ketones by the circular dichroism method showed that they contain an inner disymmetric chromophore. The presence of homoconjugation of the phenyl and enamino ketone chromophores as a result of the drawing together of their orbitals in space was also established.Communication XXXVI from the series Stereochemical Studies; see [1] for communication XXXVTranslated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 511–515, April, 1976.