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11 results on '"Zartova, Irina"'

1. Pionic atom factory project in the RIBF: Spectroscopy of pionic atom in 122Sn (d, 3He) Nuclear Reaction

Author

Itahashi, Kenta, Itoh, Satoshi, Fukunishi, Nobuhisa, Geissel, Hans, Hayano, Ryugo S., Hirenzaki, Satoru, Iwasaki, Masahiko, Kienle, Paul, Kimura, Rie, Lindberg, Karl, Nociforo, Chiara, Ohnishi, Hiroaki, Okada, Shinji, Ono, Naoya, Outa, Haruhiko, Sato, Masaharu, Suzuki, Ken, Suzuki, Takatoshi, Tatsuno, Hideyuki, Tegnér, Per–Erik, Wakasugi, Masanori, Weick, Helmut, Yamagata–Sekihara, Junko, Yamazaki, Toshimitsu, Yano, Yasushige, and Zartova, Irina

Published
2009
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2. Pionic atom factory project in the RIBF

Author

Itahashi, Kenta, primary, Itoh, Satoshi, additional, Fukunishi, Nobuhisa, additional, Geissel, Hans, additional, Hayano, Ryugo S., additional, Hirenzaki, Satoru, additional, Iwasaki, Masahiko, additional, Kienle, Paul, additional, Kimura, Rie, additional, Lindberg, Karl, additional, Nociforo, Chiara, additional, Ohnishi, Hiroaki, additional, Okada, Shinji, additional, Ono, Naoya, additional, Outa, Haruhiko, additional, Sato, Masaharu, additional, Suzuki, Ken, additional, Suzuki, Takatoshi, additional, Tatsuno, Hideyuki, additional, Tegnér, Per–Erik, additional, Wakasugi, Masanori, additional, Weick, Helmut, additional, Yamagata–Sekihara, Junko, additional, Yamazaki, Toshimitsu, additional, Yano, Yasushige, additional, and Zartova, Irina, additional

Published
2009
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3. Mesonic fusion - pion and eta meson production in light ion nuclear fusion reactions

Author

Zartova, Irina

Subjects
halo nuclei, WASA detector, Subatomär fysik, pionic fusion, Subatomic Physics, eta-meson, cross sections, Nuclear Experiment, light mesons
Abstract

The present thesis describes two experiments performed in the storage ring CELSIUS at The Svedberg Laboratory in Uppsala. In the first experiment the importance of three - nucleon clustering in the six - nucelon system was investigated. The total cross section for the production of the ground state and the 3.56 MeV second excited state of 6Li in the 3He(3He,6Li)π+ reaction has been measured at two beam energies, 261.1 and 262.5 MeV, corresponding to center - of - mass energies 1.2 and 1.9 MeV above the production threshold for the 3.56 MeV state. For the ground state the result was 347 ± 84 ± 42 and 92 ± 84 ± 11 nb respectively. The result for the 3.56 MeV state, 104 ± 23 ± 12 and 56 ± 35 ± 7 nb respectively, is compared to the result of a previous study where the 3.56 MeV state was populated in the d(4He,6Li)π0 reaction. In the second experiment a clean sample of 5×105 eta mesons was prepared by means of the d(p,3He)η reaction. Eta production was tagged by the precise determination of the kinetic energy of the associated 3He ions. In the subsequent decay of eta mesons, channels with lepton - anti - lepton pairs were studied in the WASA detector. In a separate study properties of the WASA deuterium pellet target were investigated and in particular the effects on the beam of the beam - target interactions. In both sets of experiments the fused nuclear system was detected by means of a zero - degree spectrometer with a semiconductor detector telescope. Choosing the detectors to match the rather different requirements, precise information regarding the identity and the momentum of the detected ions could be obtained in both cases.

Published
2010

4. The pd -> He-3 eta pi(0) reaction at T-p=1450 MeV CELSIUS/WASA Collaboration

Author

Schonning, K., Bargholtz, Christoph, Bashkanov, M., Berlowski, M., Bogoslawsky, D., Calen, H., Clement, H., Demiroers, L., Ekstrom, C., Fransson, K., Gerén, Linda, Gustafsson, L., Hoistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Keleta, S., Khakimova, O., Kren, F., Kullander, S., Kupsc, A., Kuzmin, A., Lindberg, Karl, Marciniewski, P., Morosov, B., Oelert, W., Pauly, C., Petren, H., Petukhov, Y., Povtorejko, A., Scobel, W., Shafigullin, R., Shwartz, B., Skorodko, T., Sopov, V., Stepaniak, J., Tegnér, Per-Erik, Engblom, Pia Thörngren, Tikhomirov, V., Turowiecki, A., Wagner, G. J., Wilkin, C., Wolke, M., Zabierowski, J., Zartova, Irina, Zlomanczuk, J., Schonning, K., Bargholtz, Christoph, Bashkanov, M., Berlowski, M., Bogoslawsky, D., Calen, H., Clement, H., Demiroers, L., Ekstrom, C., Fransson, K., Gerén, Linda, Gustafsson, L., Hoistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Keleta, S., Khakimova, O., Kren, F., Kullander, S., Kupsc, A., Kuzmin, A., Lindberg, Karl, Marciniewski, P., Morosov, B., Oelert, W., Pauly, C., Petren, H., Petukhov, Y., Povtorejko, A., Scobel, W., Shafigullin, R., Shwartz, B., Skorodko, T., Sopov, V., Stepaniak, J., Tegnér, Per-Erik, Engblom, Pia Thörngren, Tikhomirov, V., Turowiecki, A., Wagner, G. J., Wilkin, C., Wolke, M., Zabierowski, J., Zartova, Irina, and Zlomanczuk, J.

Abstract

The cross section for the pd -> He-3 eta pi(0) reaction has been measured at a beam energy of 1450 MeV using the WASA detector at the CELSIUS storage ring. The He-3 was detected in coincidence with four photons from the decays of the two mesons. The data indicate that the production mechanism involves the formation of the Delta(1232) isobar. Although the beam energy does not allow the full peak of this resonance to be seen, the invariant mass distributions Of all three pairs of final particles are well reproduced by a phase space Monte Carlo simulation weighted with the p-wave factor of the square of the pi(0) momentum in the He-3 pi(0) system., authorCount :47

Published
2010
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5. Production of eta and 3 pi mesons in the pd -> (HeX)-He-3 reaction at 1360 and 1450 MeV

Author

Schonning, K., Bargholtz, Christoph, Bashkanov, M., Berlowski, M., Bogoslawsky, D., Calen, H., Clement, H., Demiroers, L., Ekstrom, C., Fransson, K., Gerén, Linda, Gustafsson, L., Hoistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Keleta, S., Khakimova, O., Kren, F., Kullander, S., Kupsc, A., Kuzmin, A., Lindberg, Karl, Marciniewski, P., Morosov, B., Oelert, W., Pauly, C., Petren, H., Petukhov, Y., Povtorejko, A., Scobel, W., Shafigullin, R., Shwartz, B., Skorodko, T., Sopov, V., Stepaniak, J., Tegnér, Per-Erik, Engblom, Pia Thörngren, Tikhomirov, V., Turowiecki, A., Wagner, G. J., Wolke, M., Zabierowski, J., Zartova, Irina, Zlomanczuk, J., Schonning, K., Bargholtz, Christoph, Bashkanov, M., Berlowski, M., Bogoslawsky, D., Calen, H., Clement, H., Demiroers, L., Ekstrom, C., Fransson, K., Gerén, Linda, Gustafsson, L., Hoistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Keleta, S., Khakimova, O., Kren, F., Kullander, S., Kupsc, A., Kuzmin, A., Lindberg, Karl, Marciniewski, P., Morosov, B., Oelert, W., Pauly, C., Petren, H., Petukhov, Y., Povtorejko, A., Scobel, W., Shafigullin, R., Shwartz, B., Skorodko, T., Sopov, V., Stepaniak, J., Tegnér, Per-Erik, Engblom, Pia Thörngren, Tikhomirov, V., Turowiecki, A., Wagner, G. J., Wolke, M., Zabierowski, J., Zartova, Irina, and Zlomanczuk, J.

Abstract

The cross-sections of the pd -> He-3 eta, pd -> He-3 pi(0)pi(0)pi(0) and pd -> He-3 pi(+)pi(-)pi(0) reactions have been measured at the beam kinetic energies T-p = 1360 MeV and T-p = 1450 MeV using the CELSIUS/WASA detector setup. At both energies, the differential cross-section d sigma/d Omega of the eta meson in the pd -> He-3 eta reaction shows a strong forward-backward asymmetry in the CMS. The ratio between the pd -> He-3 pi(+)pi(-)pi(0) and pd -> He-3 pi(0)pi(0)pi(0) cross-sections has been analysed in terms of isospin amplitudes. The reconstructed invariant-mass distributions of the pi pi, He-3 pi and (3)He2 pi systems provide hints on the role of nucleon resonances in the 3 pi production process., authorCount :46

Published
2010
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6. eta-meson production in proton-proton collisions at excess energies of 40 and 72 MeV

Author

Petren, H., Bargholtz, Christoph, Bashkanov, M., Bogoslavsky, D., Calen, H., Clement, H., Demiroers, L., Ekstrom, C., Fransson, K., Faldt, G., Gerén, Linda, Hoistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Keleta, S., Khakimova, O., Koch, I., Kren, F., Kullander, S., Kupsc, A., Lindberg, Karl, Marciniewski, P., Morosov, B., Pauly, C., Petukhov, Y., Povtorejko, A., Schonning, K., Scobel, W., Skorodko, T., Stepaniak, J., Tegnér, Per-Erik, Engblom, Pia Thörngren, Tikhomirov, V., Wilkin, C., Wolke, M., Zabierowski, J., Zartova, Irina, Zlomanczuk, J., Petren, H., Bargholtz, Christoph, Bashkanov, M., Bogoslavsky, D., Calen, H., Clement, H., Demiroers, L., Ekstrom, C., Fransson, K., Faldt, G., Gerén, Linda, Hoistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Keleta, S., Khakimova, O., Koch, I., Kren, F., Kullander, S., Kupsc, A., Lindberg, Karl, Marciniewski, P., Morosov, B., Pauly, C., Petukhov, Y., Povtorejko, A., Schonning, K., Scobel, W., Skorodko, T., Stepaniak, J., Tegnér, Per-Erik, Engblom, Pia Thörngren, Tikhomirov, V., Wilkin, C., Wolke, M., Zabierowski, J., Zartova, Irina, and Zlomanczuk, J.

Abstract

The production of eta mesons in proton-proton collisions has been studied using the WASA detector at the CELSIUS storage ring at excess energies of Q = 40 MeV and Q = 72 MeV. The eta was detected through its 2 gamma decay in a near-4 pi electromagnetic calorimeter, whereas the protons were measured by a combination of straw chambers and plastic scintillator planes in the forward hemisphere. About 6.9 x 10(4) and 9.3 x 10(4) events were found at Q = 40 MeV and Q = 72 MeV, respectively, with background contributions of less than 5%. A simple parametrization of the production cross section in terms of low partial waves was used to evaluate the acceptance corrections. Strong evidence was found for the influence of higher partial waves. The Dalitz plots show the presence of p waves in both the pp and the eta {pp} systems and the angular distributions of the eta in the center-of-mass frame suggest the influence of d-wave eta mesons., authorCount :40

Published
2010
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7. Exclusive measurement of two-pion production in the dd->4He pi pi reaction

Author

Bargholtz, Ch, Gerén, Linda, Lindberg, Karl, Tegnér, Per-Erik, Thörngren-Engblom, Pia, Zartova, Irina, Bargholtz, Ch, Gerén, Linda, Lindberg, Karl, Tegnér, Per-Erik, Thörngren-Engblom, Pia, and Zartova, Irina

Abstract

The results from the first kinematically complete measurement of the reaction are reported. The aim was to investigate a long standing puzzle regarding the origin of the peculiar ππ-invariant mass distributions appearing in double pion production in light ion collisions, the so-called ABC effect. The measurements were performed at the incident deuteron energies of 712 MeV and 1029 MeV, with the WASA detector assembly at CELSIUS in Uppsala, Sweden. We report the observation of a characteristic enhancement at low ππ-invariant mass at 712 MeV, the lowest energy yet. At the higher energy, in addition to confirming previous experimental observations, our results reveal a strong angular dependence of the pions in the overall centre of mass system. The results are qualitatively reproduced by a theoretical model, according to which the ABC effect is described as resulting from a kinematical enhancement in the production of the pion pairs from two parallel and independent NN→dπ sub-processes., QC 20180418

Published
2009
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9. The WASA detector facility at CELSIUS

Author

Bargholtz, Christoph, Gerén, Linda, Lindberg, Karl, Tegnér, Per-Erik, Zartova, Irina, Bargholtz, Christoph, Gerén, Linda, Lindberg, Karl, Tegnér, Per-Erik, and Zartova, Irina

Abstract

Totalt 85 författare

Published
2008

11. 200 and 300 MeV/nucleon Nuclear Reactions Responsible for Single-Event Effecrs in Microelectronics

Author

Jäderström, Henrik, Murin, Yuri, Babain, Yuri, Chubarov, Mikhail, Pljuschev, Vladimir, Zubkov, Mikhail, Nomokonov, Peter, Olsson, Nils, Blomgren, Jan, Tippawan, Udomrat, Zartova, Irina, Budzanowski, Andrzej, Czech, Bronislaw, Skwirczynska, Irina, Kondratiev, Vasilij, Tang, Henry, Aichelin, Jörg, Gudima, Konstantin, Jäderström, Henrik, Murin, Yuri, Babain, Yuri, Chubarov, Mikhail, Pljuschev, Vladimir, Zubkov, Mikhail, Nomokonov, Peter, Olsson, Nils, Blomgren, Jan, Tippawan, Udomrat, Zartova, Irina, Budzanowski, Andrzej, Czech, Bronislaw, Skwirczynska, Irina, Kondratiev, Vasilij, Tang, Henry, Aichelin, Jörg, and Gudima, Konstantin

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