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Your search keyword '"Pozharova, E. A."' showing total 170 results
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170 results on '"Pozharova, E. A."'

3. Determination of the accuracy of measuring the energy of charged particles by their path lengths in nuclear emulsion

Author

Barabash, A. S., Bradnova, V. Ya., Chernyavsky, M. M., Dubinina, V. V., Egorenkova, N. P., Konovalov, S. I., Polukhina, N. G., Pozharova, E. A., Shchedrina, T. V., Smirnitsky, V. A., Starkov, N. I., So, Tan Nang, and Umatov, V. I.

Subjects
Nuclear Experiment
Abstract

The path lengths of monochromatic muons emerging in the $\pi \to \mu\nu_{\mu} $ decay were measured by the coordinate method with the view to determine their energy by path length. The dispersion of muon energy measurements by this method was $ \sigma_{\mu} = (0.11 \pm 0.01)$ MeV, which corresponds to the accuracy of $ \sigma \approx 2.7%$ of the energy of a charged particle estimated by its path length in nuclear emulsion. The developed method will enable measurements of electron energies in $2\beta $ decay ($\sim 3$ MeV) to an accuracy of $ \sigma \approx 5%$., Comment: 8 pages, 6 figures

Published
2012
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4. Measurement of $\beta\beta$ Decay-Simulating Events in Nuclear Emulsion with Molybdenum Filling

Author

Ashitkov, V. D., Barabash, A. S., Bradnova, V. Ya., Ditlov, V. A., Dubinina, V. V., Egorenkova, N. P., Konovalov, S. I., Pozharova, E. A., Polukhina, N. G., Smirnitsky, V. A., Starkov, N. I., Chernyavsky, M. M., Shchedrina, T. V., and Umatov, V. I.

Subjects
Nuclear Experiment
Abstract

The measurement of positron--nucleus collisions was used to estimate the possibility of suppressing background events that simulate $\beta\beta$ decay in the emulsion region adjacent to molybdenum conglomerates. The range of the escape of two relativistic particles from the interaction was found to be $ = (0.60\pm 0.03) ~\mu$m, which approximately corresponds to the grain size of developed nuclear emulsion. No correlation of the values of d with the angle between two relativistic particles was observed. It was shown that it was possible to exclude $\beta\beta$ decay background from electrons emerging in the decay of elements of naturally occurring radioactive chains. The background from $\beta$ decays of $^{90}$Sr and $^{40}$K available in emulsion around Mo conglomerates was determined by the ratio of the volume $(\sim d^3)$ to the total volume of emulsion and was found to be $1.5\cdot 10^{-2}$. It was shown that the backgrounds from $^{40}$K, $^{90}$Sr and natural radioactivity could be significantly suppressed and would not limit the sensitivity of the experiment with 1 kg $^{100}$Mo., Comment: 6 pages, 4 figures

Published
2011

5. Nuclear emulsion with molybdenum filling for observation of $\beta\beta$ decay

Author

Ashitkov, V. D., Bagulya, A. V., Barabash, A. S., Bradnova, V. Ya., Chernyavsky, M. M., Konovalov, S. I., Okat'eva, N. M., Orlova, G. I., Polukhina, N. G., Pozharova, E. A., Smirnitsky, V. A., Starkov, N. I., Vladimirov, M. S., and Umatov, V. I.

Subjects
Nuclear Experiment
Abstract

The usage of nuclear emulsion with molybdenum filling for observation of $\beta\beta$ decay are shown to be possible. Estimates for 1 kg of $^{100}$Mo with zero background give the sensitivity for the $0\nu\beta\beta$ decay of $^{100}$Mo at the level of $\sim 1.5\cdot 10^{24}$ y for 1 year of measurement., Comment: 7 pages, 3 figures

Published
2010
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34. Interactions of 10.6 GeV/nucleon gold nuclei in nuclear emulsion

Author

Cherry, M. L., Dąbrowska, A., Deines-Jones, P., Dubinina, A. J., Holynski, R., Jones, W. V., Jurak, A., Kolganova, E. D., Olszewski, A., Pozharova, E. A., Sengupta, K., Skorodko, T. Yu., Smirnitski, V. A., Szarska, M., Waddington, C. J., Wefel, J. P., Wilczyńska, B., Wolter, W., and KLMM Collaboration

Published
1994
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36. Neutrino production of charmed particles in a hybrid experiment E-564

Author

Batusov, Yu., Bunyatov, S., Kuznetsov, O., Lyukov, V., Tretyak, V., Egorov, O., Goritchev, P., Kolganova, E., Makhlyueva, I., Pozharova, E., Shamanov, V., Smirnitsky, V., Ammosov, V., Baranov, V., Gapienko, V., Klukhin, V., Koreshev, V., Pitukhin, P., Sirotenko, V., Jurak, A., Olszewski, A., Wilczynska, B., Wilczynski, H., Wolter, W., Wosiek, B., Tchernev, H., Ivanova, M., Smart, W., Voyvodic, L., Rubin, H., Ammar, R., Coppage, D., Davis, R., Grees, J., Kwak, N., Riemer, R., Stump, R., Burnett, T., Krzywdzinski, S., Lord, J., Rosenbladt, R., Wilkes, R., Bakich, A., Peak, L., and FERMILAB E-564 Collaboration

Published
1990
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39. Automated Track Recognition and Event Reconstruction in Nuclear Emulsion

Author

Deines-Jones, P, Cherry, M. L, Dabrowska, A, Holynski, R, Jones, W. V, Kolganova, E. D, Kudzia, D, Nilsen, B. S, Olszewski, A, Pozharova, E. A, Sengupta, K, Szarska, M, Trzupek, A, Waddington, C, J, Wefel, J. P, Wilczynska, B, Wilczynski, H, Wolter, W, Wosiek, B, and Wozniak, K

Subjects
Atomic And Molecular Physics
Abstract

The major advantages of nuclear emulsion for detecting charged particles are its submicron position resolution and sensitivity to minimum ionizing particles. These must be balanced, however, against the difficult manual microscope measurement by skilled observers required for the analysis. We have developed an automated system to acquire and analyze the microscope images from emulsion chambers. Each emulsion plate is analyzed independently, allowing coincidence techniques to be used in order to reject back- ground and estimate error rates. The system has been used to analyze a sample of high-multiplicity Pb-Pb interactions (charged particle multiplicities approx. 1100) produced by the 158 GeV/c per nucleon Pb-208 beam at CERN. Automatically reconstructed track lists agree with our best manual measurements to 3%. We describe the image analysis and track reconstruction techniques, and discuss the measurement and reconstruction uncertainties.

Published
1998

40. Backward emitted protons in interactions of neutrinos with nuclei in photoemulsion

Author

Dayon, M., Rappoport, V., Smirnitsky, V., Ammar, R., Ammosov, V., Bakich, A., Baranov, V., Batusov, Yu., Bunyatov, S., Burnett, T., Coppage, D., Davis, R., Egorov, O., Gapienko, V., Goritchev, P., Gress, J., Ivanova, M., Jurak, A., Klukhin, V., Kolganova, E., Koreshev, V., Krzywdzinski, S., Kuznetsov, O., Kwak, N., Lord, J., Lyukov, V., Olszewski, A., Peak, L., Pitukhin, P., Pozharova, E., Riemer, R., Rosenbladt, R., Rubin, H., Shamanov, V., Sirotenko, V., Smart, W., Stump, R., Tchernev, H., Voyvodic, L., Wilczynska, B., Wilczynski, H., Wilkes, R., Wolter, W., and Wosiek, B.

Published
1992
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41. High-Multiplicity Lead-Lead Interactions at 158 GeV/c per nucleon

Author

Deines-Jones, P, Cherry, M. L, Dabrowska, A, Holynski, R, Jones, W. V, Kolganova, E. D, Kudzia, D, Nilsen, B. S, Olszewski, A, Pozharova, E. A, Sengupta, K, Szarska, M, Trzupek, A, Waddington, C. J, Wefel, J. P, Wilczynska, B, Wolter, W, Wosiek, B, and Wozniak, K

Subjects
Atomic And Molecular Physics
Abstract

The Krakow-Louisiana-Minnesota-Moscow Collaboration (KLMM) has exposed a set of emulsion chambers with lead targets to a 158 GeV/c per nucleon beam of Pb-208 nuclei, and we report the initial analysis of 40 high-multiplicity Pb-Pb collisions. To test the validity of the superposition model of nucleus-nucleus interactions in this new regime, we compare the shapes of the pseudorapidity distributions with FRITIOF Monte Carlo model calculations, and find close agreement for even the most central events. We characterize head-on collisions as having a mean multiplicity of 1550 +/- 120 and a peak pseudorapidity density of 390 +/- 30. These estimates are significantly lower than our FRITIOF calculations.

Published
1996
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46. Charged Particles of Energy in Excess of Evaporation Energy from K−-Meson Absorption by Nuclei.

Author

Dubinina, V. V., Egorenkova, N. P., Pozharova, E. A., and Smirnitsky, V. A.

Subjects
MESONS, ABSORPTION, PARTICLES, CHARGED particle accelerators, IDENTIFICATION
Abstract

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. [ABSTRACT FROM AUTHOR]

Published
2019
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47. Observation of Electrons with Energies up to 180 keV Accompanying μ+ Decay.

Author

Byakov, V. M., Ditlov, V. A., Dubinina, V. V., Egorenkova, N. P., Pozharova, E. A., and Smirnitsky, V. A.

Subjects
ELECTRONS, MUONS, MUON decay, NUCLEAR emulsions, ELECTRON energy states
Abstract

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. [ABSTRACT FROM AUTHOR]

Published
2018
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48. Determination of the energy measurement accuracy for charged particles by their range in nuclear photoemulsion

Author

Barabash, A. S., primary, Bradnova, V. Ya., additional, Dubinina, V. V., additional, Egorenkova, N. P., additional, Konovalov, S. I., additional, Pozharova, E. A., additional, Polukhina, N. G., additional, Smirnitskii, V. A., additional, Starkov, N. I., additional, So, Tan Nang, additional, Chernyavskii, M. M., additional, Shchedrina, T. V., additional, and Yumatov, V. I., additional

Published
2012
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49. Particle production and fluctuations in 158 GeV/n Pb collisions with nuclear targets

Author

Wosiek, B, Cherry, M L, Dabrowska, A, Deines-Jones, P, Holynski, R, Jones, W V, Kolganova, E D, Kudzia, D, Nilsson, B S, Olszewski, A, Pozharova, E A, Sen-Gupta, K, Szarska, M, Trzupek, A, Waddington, C Jake, Wefel, J P, Wilczynska, B, Wilczynski, H, Wolter, W, and Wozniak, K

Subjects
Particle Physics - Experiment
Published
1995

50. Observation of the production of Li fragments in alpha-particle interaction with photoemulsion nuclei.

Author

Dubinina, V., Egorenkova, N., Pozharova, E., and Smirnitsky, V.

Subjects
ALPHA rays, PARTICLE interactions, PARTICLE physics, ELECTROMAGNETIC interactions, PARTICLE emissions
Abstract

About 37 × 10 events of alpha-particle interaction with photoemulsion nuclei were scanned. Among them, 339 events involving the production of a Li fragment and the decay Li → Be → 2α were found. Over the region extending up to 60 MeV, the energy spectrum of 8Li is consistent with the mechanism of fragment evaporation from an excited nucleus. At Li energies in excess of 70 MeV, the existence of a Li fragment in target nuclei before their interaction with a projectile is possibly observed with a probability of about 10. [ABSTRACT FROM AUTHOR]

Published
2015
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