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413 results on '"Cindro, N."'

5. Direct comparison of phase-space distributions of K- and K+ mesons in heavy-ion collisions at SIS energies -- evidence for in-medium modifications of kaons?

Author

Wiśniewski, K., Crochet, P., Herrmann, N., Andronic, A., Averbeck, R., Devismes, A., Finck, C., Gobbi, A., Hartmann, O., Hildenbrand, K.D., Koczon, P., Kress, T., Kutsche, R., Leifels, Y., Reisdorf, W., Schüll, D., Alard, J.P., Barret, V., Basrak, Z., Bastid, N., Belyaev, I., Bendarag, A., Berek, G., Čaplar, R., Cindro, N., Dupieux, P., Dželalija, M., Eskef, M., Fodor, Z., Grishkin, Y., Hong, B., Kecskemeti, J., Kim, Y.J., Kirejczyk, M., Korolija, M., Kotte, R., Kowalczyk, M., Lebedev, A., Lee, K.S., Manko, V., Merlitz, H., Mohren, S., Moisa, D., Neubert, W., Nianine, A., Pelte, D., Petrovici, M., Plettner, C., Rami, F., de Schauenburg, B., Seres, Z., Sikora, B., Sim, K.S., Simion, V., Siwek-Wilczyńska, K., Smolyankin, V., Somov, A., Stockmeier, M., Stoicea, G., Vasiliev, M., Wagner, P., Wohlfarth, D., Yang, J.T., Yushmanov, I., Zhilin, A., and The FOPI Collaboration

Published
2000
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6. On the space-time difference of proton and composite particle emission in central heavy-ion reactions at 400 A· MeV

Author

Kotte, R., Barz, H. W., Neubert, W., Plettner, C., Wohlfarth, D., Alard, J.P., Andronic, A., Averbeck, R., Basrak, Z., Bastid, N., Bendarag, N., Berek, G., Čaplar, R., Cindro, N., Crochet, P., Devismes, A., Dupieux, P., Dželalija, M., Eskef, M., Fodor, Z., Gobbi, A., Grishkin, Y., Herrmann, N., Hildenbrand, K.D., Hong, B., Kecskemeti, J., Kim, Y.J., Kirejczyk, M., Korolija, M., Kowalczyk, M., Kress, T., Kutsche, R., Lebedev, A., Lee, K.S., Leifels, Y., Manko, V., Merlitz, H., Moisa, D., Nianine, A., Pelte, D., Petrovici, M., Rami, F., Reisdorf, W., de Schauenburg, B., Schüll, D., Seres, Z., Sikora, B., Sim, K.S., Simion, V., Siwek-Wilczyńska, K., Somov, A., Stoicea, G., Vasiliev, M.A., Wagner, P., Wiśniewski, K., Yang, J.T., Yushmanov, Y., Zhilin, A., and The FOPI Collaboration

Published
1999
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7. Identification of baryon resonances in central heavy-ion collisions at energies between 1 and 2 AGeV: FOPI Collaboration

Author

Eskef, M., Pelte, D., Goebels, G., Häfele, E., Herrmann, N., Korolija, M., Leifels, Y., Merlitz, H., Mohren, S., Stockmeier, M.R., Trzaska, M., Alard, J.P., Andronic, A., Averbeck, R., Basrak, Z., Bastid, N., Belyaev, I., Best, D., Buta, A., Čaplar, R., Cindro, N., Coffin, J.P., Crochet, P., Dupieux, P., Dželalija, M., Fraysse, L., Fodor, Z., Genoux-Lubain, A., Gobbi, A., Hildenbrand, K.D., Hong, B., Jundt, F., Kecskemeti, J., Kirejczyk, M., Kotte, R., Kutsche, R., Lebedev, A., Manko, V., Mösner, J., Moisa, D., Neubert, W., Petrovici, M., Pinkenburg, C., Plettner, C., Pras, P., Rami, F., Ramillien, V., Reisdorf, W., Ritman, J.L., de Schauenburg, B., Schüll, D., Seres, Z., Sikora, B., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Vasiliev, M.A., Wagner, P., Wang, G.S., Wisniewski, K., Wohlfarth, D., and Zhilin, A.

Published
1998
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10. Charged pion production in Au on Au collisions at 1 AGeV The FOPI Collaboration

Author

Pelte, D., Häfele, E., Best, D., Goebels, G., Herrmann, N., Pinkenburg, C., Reisdorf, W., Trzaska, M., Alard, J. P., Amouroux, V., Andronic, A., Basrak, Z., Bastid, N., Belyaev, I., Biegansky, J., Buta, A., Čaplar, R., Cindro, N., Coffin, J. P., Crochet, P., Dupieux, P., Dżelalija, M., Erö, J., Eskef, M., Fintz, P., Fodor, Z., Genoux-Lubain, A., Gobbi, A., Guillaume, G., Hildenbrand, K. D., Hong, B., Jundt, F., Kecskemeti, J., Kirejczyk, M., Koncz, P., Korolija, M., Korchagin, Y., Kotte, R., Kuhn, C., Lambrecht, D., Lebedev, A., Legrand, I., Leifels, Y., Manko, V., Merlitz, H., Mösner, J., Mohren, S., Moisa, D., Neubert, W., Petrovici, M., Pras, P., Rami, F., Ramillien, V., Ritman, J. L., Roy, C., Schüll, D., Seres, Z., Sikora, B., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Sodan, U., Vasiliev, M. A., Wagner, P., Wang, G. S., Wienold, T., Wohlfarth, D., and Zhilin, A.

Published
1997
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11. Shape of collective flow in highly central Au(150 A MeV)+Au collisions

Author

Roy, C., Kuhn, C., Coffin, J. P., Crochet, P., Fintz, P., Guillaume, G., Jundt, F., Maazouzi, C., Rami, F., Tizniti, L., Wagner, P., Alard, J. P., Amouroux, V., Basrak, Z., Bastid, N., Belyaev, I., Best, D., Biegansky, J., Buta, A., Čaplar, R., Cindro, N., Donà, R., Dupieux, P., Dzelalija, M., Fan, Z. G., Fodor, Z., Fraysse, L., Gobbi, A., Herrmann, N., Hildenbrand, K. D., Hölbling, S., Hong, B., Jeong, S. C., Kecskemeti, J., Kirejczyk, M., Koncz, P., Korchagin, Y., Kotte, R., Lebedev, A., Legrand, I., Leifels, Y., Manko, V., Mgebrishvili, G., Moisa, D., Mösner, J., Neubert, W., Pelte, D., Petrovici, M., Pinkenburg, C., Pras, P., Reisdorf, W., Ritman, J. L., Sadchikov, A. G., Schüll, D., Seres, Z., Sikora, B., Simion, V., Smolyankin, V., Sodan, U., Trzaska, M., Vasiliev, M., Wang, G. S., Wessels, J. P., Wienold, T., Wohlfarth, D., Zhilin, A., Konopka, J., and Stöcker, H.

Published
1997
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16. On the transverse momentum distribution of strange hadrons produced in relativistic heavy ion collisions

Author

Ritman, J. L., Herrmann, N., Best, D., Alard, J. P., Amouroux, V., Bastid, N., Belyaev, I., Berger, L., Biegansky, J., Buta, A., Čaplar, R., Cindro, N., Coffin, J. P., Crochet, P., Dona, R., Dupieux, P., Dzelalija, M., Fintz, P., Fodor, Z., Genoux-Lubain, A., Gobbi, A., Goebels, G., Guillaume, G., Grigorian, Y., Häfele, E., Hildenbrand, K. D., Hölbling, S., Jundt, F., Kecskemeti, J., Kirejczyk, M., Korchagin, Y., Kotte, R., Kuhn, C., Lambrecht, D., Lebedev, A., Legrand, I., Leifels, Y., Maazouzi, C., Manko, V., Matulewicz, T., Mösner, J., Mohren, S., Moisa, D., Neubert, W., Pelte, D., Petrovici, M., Pinkenburg, C., Rami, F., Ramillien, V., Reisdorf, W., Roy, C., Schüll, D., Seres, Z., Sikora, B., Simion, V., Siwek-Wilczyńska, K., Smolyankin, V., Sodan, U., Tizniti, L., Trzaska, M., Vasiliev, M. A., Wagner, P., Wang, G. S., Wienold, T., Wohlfarth, D., Zhilin, A., and The FOPI Collaboration

Published
1995
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31. Early stages of nucleus-nucleus collisions: A microscopic calculation of the initial number of degrees of freedom

Author

Korolija M, Breták E, Cindro N, and Griffin Jj

Subjects
Nuclear reaction, Physics, Nuclear Theory, Phase (waves), Degrees of freedom (physics and chemistry), General Physics and Astronomy, Inelastic scattering, Space (mathematics), Spectral line, Nuclear physics, Phase space, Atomic physics, Nuclear Experiment, Nucleon
Abstract

A microscopic model for estimating {ital n}{sub 0}, the initial number of degrees of freedom used in calculating pre-equilibrium nucleon emission from heavy-ion reactions, is presented. The model follows the evolution of the geometrical and phase spaces during the process of the gradual fusioning of the target and the projectile. A good agreement is found between the calculated values of {ital n}{sub 0} and the empirical values extracted from fits to nucleon spectra.

Published
1991

37. Direct comparison of phase-space distributions of K- and K+ mesons in heavy-ion collisions at SIS energies - evidence for in-medium modifications of kaons ?

Author

Wisniewski, K., Crochet, P., Herrmann, N., Andronic, A., Averbeck, R., Devismes, A., Finck, C., Gobbi, A., Hartmann, O., Hildenbrand, K.D., Koczon, P., Kress, T., Kutsche, R., Leifels, Y., Reisdorf, W., Schull, D., Alard, J-P., Barret, V., Basrak, Z., Bastid, N., Belyaev, I., Bendarag, A., Berek, G., Caplar, R., Cindro, N., Dupieux, P., Dzelalija, M., Eskef, M., Fodor, Z., Grishkin, Y., Hong, B., Kecskemeti, J., Kim, Y.J., Kirejczyk, M., Korolija, M., Kotte, R., Kowalczyk, M., Lebedev, A., Lee, K.S., Manko, V., Merlitz, H., Mohren, S., Moisa, D., Neubert, W., Nianine, A., Pelte, D., Petrovici, M., Plettner, C., Rami, F., de Schauenburg, B., Seres, Z., Sikora, B., Sim, K.S., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Somov, A., Stockmeier, M., Stoicea, G., Vasiliev, M., Wagner, P., Wohlfarth, D., Yang, J.T., Yushmanov, I., Zhilin, A., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and FOPI

Subjects
Physics, Nuclear and High Energy Physics, Meson, 010308 nuclear & particles physics, Nuclear Theory, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Kinetic energy, 01 natural sciences, 7. Clean energy, Nuclear physics, Phase space, 0103 physical sciences, Incident beam, Yield ratio, Heavy ion, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment
Abstract

The ratio of K- to K+ meson yields has been measured in the systems RuRu at 1.69 A GeV, Ru+Zr at 1.69 A GeV, and Ni+Ni at 1.93 A GeV incident beam kinetic energy. The yield ratio is observed to vary across the measured phase space. Relativistic transport-model calculations indicate that the data are best understood if in-medium modifications of the kaons are taken into account., 14 pages including 3 figures

Published
2001

38. Subthreshold $\phi$(1020) meson production in central heavy-ion collisions

Author

Kotte, R., Alard, J-P., Andronic, A., Averbeck, R., Barret, V., Basrak, Z., Bastid, N., Belyaev, I., Bendarag, A., Berek, G., Caplar, R., Cindro, N., Crochet, P., Devismes, A., de Schauenburg, B., Dupieux, P., Dzelalija, M., Eskef, M., Finck, C., Fodor, Z., Folger, H., Fraysse, L., Genoux-Lubain, A., Gobbi, A., Grigorian, Y., Grishkin, Y., Herrmann, N., Hildenbrand, K.D., Hong, B., Kecskemeti, J., Kim, Y.J., Koczon, P., Kirejczyk, M., Korolija, M., Kowalczyk, M., Kress, T., Kutsche, R., Lebedev, A., Lee, K.S., Leifels, Y., Manko, V., Merlitz, H., Mohren, S., Moisa, D., Mosner, J., Neubert, W., Nianine, A., Pelte, D., Petrovici, M., Pinkenburg, C., Plettner, C., Rami, F., Reisdorf, W., Ritman, J., Schull, D., Seres, Z., Sikora, B., Sim, K.S., Simion, V., Siwek-Wilczynska, K., Somov, A., Stockmeier, M.R., Stoicea, G., Vasilev, M., Wagner, P., Wisniewski, K., Wohlfarth, D., Yang, J.T., Yushmanov, I., Zhilin, A., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Buballa M. Noerenberg W. Schaefer B.J. Wambach J., and FOPI

Subjects
Information sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

Origins of french Information sciences

Published
2000

39. Results from FOPI on strangeness production and propagation in hot and dense nuclear matter

Author

Devismes, A., Alard, J-P., Andronic, A., Averbeck, R., Barret, V., Basrak, Z., Bastid, N., Belyaev, I., Bendarag, A., Berek, G., Caplar, R., Cindro, N., Crochet, P., de Schauenburg, B., Dupieux, P., Dzelalija, M., Eskef, M., Finck, C., Fodor, Z., Folger, H., Fraysse, L., Genoux-Lubain, A., Gobbi, A., Grigorian, Y., Grishkin, Y., Herrmann, N., Hildenbrand, K.D., Hong, B., Kecskemeti, J., Kim, Y.J., Koczon, P., Kirejczyk, M., Korolija, M., Kotte, R., Kowalczyk, M., Kress, T., Kutsche, R., Lebedev, A., Lee, K.S., Leifels, Y., Manko, V., Merlitz, H., Mohren, S., Moisa, D., Mosner, J., Neubert, W., Nianine, A., Pelte, D., Petrovici, M., Pinkenburg, C., Plettner, C., Rami, F., Reisdorf, W., Ritman, J., Schull, D., Seres, Z., Sikora, B., Sim, K.S., Simion, V., Siwek-Wilczynska, K., Somov, A., Stockmeier, M.R., Stoicea, G., Vasilev, M., Wagner, P., Wisniewski, K., Wohlfarth, D., Yang, J.T., Yushmanov, I., Zhilin, A., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Buballa M. Noerenberg W. Schaefer B.J. Wambach J., and FOPI

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
2000

40. Sideward flow of $K^{+}$ in Ru+Ru and Ni+Ni reactions at SIS energies

Author

Crochet, Philippe, Herrmann, N, Wisniewski, K, Leifels, Y, Averbeck, R, Devismes, A, Finck, C, Gobbi, A, Hildenbrand, K D, Kress, T, Kutsche, R, Reisdorf, W, Schüll, D, Alard, J P, Andronic, A, Barret, V, Basrak, Z, Bastid, N, Belyaev, I, Bendarag, A, Berek, G, Caplar, R, Cindro, N, Dupieux, P, Czelalija, M, Eskef, M, Fodor, Z, Grishkin, Yu L, Hong, B H, Kecskeméti, J, kim, Y J, Kirejczyk, M, Korolija, M, Kotte, R, Kowalczyk, M, Lebedev, A, Lee, K S, Man'ko, V I, Merlitz, H, Mohren, S, Moisa, D, Neubert, W, Nyanin, A, Pelte, D, Petrovici, M, Plettner, C, Rami, F, De Schauenburg, B, Seres, Z, Sikora, B, Sim, K S, Simion, V, Siwek-Wilczynska, K, Smolyankin, V T, Somov, A, Stockmeier, M R, Stoicea, G, Vasilev, M, Wagner, P, Wohlfarth, D, Yang, J T, Yushmanov, I E, and Zhilin, A V

Subjects
Nuclear Physics
Published
2000

41. Isospin-tracing:A probe of non-equilibrium in central heavy-ion collisions

Author

Rami, F., Leifels, Y., Schauenburg, B., Gobbi, A., Hong, B., Alard, J. P., Andronic, A., Averbeck, R., Barret, V., Basrak, Z., Bastid, N., Belyaev, I., Bendarag, A., Berek, G., Caplar, R., Cindro, N., Crochet, P., Devismes, A., Dupieux, P., Dzelalija, M., Eskef, M., Finck, C., Fodor, Z., Folger, H., Fraysse, L., Genoux-Lubain, A., Grigorian, Y., Grishkin, Y., Herrmann, N., Hildenbrand, K. D., Kecskemeti, J., Kim, Y. J., Koczon, P., Kirejczyk, M., Korolija, M., Kotte, R., Kowalczyk, M., Kress, T., Kutsche, R., Lebedev, A., Lee, K. S., Manko, V., Merlitz, H., Mohren, S., Moisa, D., Mösner, J., Neubert, W., Nianine, A., Pelte, D., Petrovici, M., Pinkenburg, C., Plettner, C., Reisdorf, W., Ritman, J., Schüll, D., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczynska, K., Somov, A., Stockmeier, M. R., Stoicea, G., Vasiliev, M., Wagner, P., Wisniewski, K., Wohlfarth, D., Yang, J. T., Yushmanow, I., and Zhilin, A.

Subjects
25.75.Ld, 25.75.Dw, Nuclear Theory, Nuclear Experiment, 25.75.-q [PACS numbers]
Abstract

Four different combinations of 9644Ru and 9640Zr nuclei, both as projectile and target, were investigated at the same bombarding energy of 400 AMeV using a 4pi detector. The degree of isospin mixing between projectile and target nucleons is mapped across a large portion of the phase space using two different isospin-tracer observables, the number of measured protons and the t/3He yield ratio. The experimental results show that the global equilibrium is not reached even in the most central collisions. Quantitative measures of stopping and mixing are extracted from the data. They are found to exhibit a quite strong sensitivity to the in-medium (n,n) cross section used in microscopic transport calculations.

Published
2000

42. On the Space-Time Difference of Proton and Composite Particle Emission in Central Heavy-Ion Reactions at 400 AMeV

Author

Kotte, R., Barz, H. W., Neubert, W., Plettner, C., Wohlfarth, D., Alard, J. P., Andronic, A., Averbeck, R., Basrak, Z., Bastid, N., Bendarag, N., Berek, G., Caplar, R., Cindro, N., Crochet, P., Devismes, A., Dupieux, P., Dzelalija, M., Eskef, M., Fodor, Z., Gobbi, A., Grishkin, Y., Herrmann, N., Hildenbrand, K. D., Hong, B., Kecskemeti, J., Kim, Y. J., Kirejczyk, M., Korolija, M., Kowalczyk, M., Kress, T., Kutsche, R., Lebedev, A., Lee, K. S., Leifels, Y., Manko, V., Merlitz, H., Moisa, D., Nianine, A., Pelte, D., Petrovici, M., Rami, F., Reisdorf, W., Schauenburg, B., Schüll, D., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczynska, K., Somov, A., Stoicea, G., Vasiliev, M. A., Wagner, P., Wisniewski, K., Yang, J. T., Yushmanov, Y., and Zhilin, A.

Subjects
Multifragmentation, Fragment-fragment correlation, Nuclear physics, Final-state interaction, Radial flow, Intermediate energy heavy-ion reactions
Abstract

Small-angle correlations of pairs of nonidentical light charged particles produced in central collisions of heavy ions in the A=100 mass region at a beam energy of 400 AMeV are investigated with the FOPI detector system at GSI Darmstadt. The difference of longitudinal correlation functions with the relative velocity parallel and anti-parallel to the center-of-mass velocity of the pair in the central source frame is studied. This method allows extracting the apparent space-time differences of the emission of the charged particles. Comparing the correlations with results of a final-state interaction model delivers quantitative estimates of these asymmetries. Time delays as short as 1 fm/c or - alternatively - source radius differences of a few tenth fm are resolved. The strong collective expansion of the participant zone introduces not only an apparent reduction of the source radius but also a modification of the emission times. After correcting for both effects a complete sequence of space-time emission points of p, d, t, 3He, alpha particles is presented for the first time.

Published
1999

43. Proton-Proton Correlations in Central Collisions of Ni+Ni at 1.93 A GeV and the Space-Time Extent of the Emission Source

Author

Siwek-Wilczynska, K., Somov, A., Sodan, U., Seres, Z., Simion, V., Sikora, B., Roy, C., Ritman, J. L., Reisdorf, W., Rami, F., Pras, P., Merlitz, H., Pinkenburg, C., Petrovici, M., Pelte, D., Mohren, S., Tizniti, L., Biegansky, J., Kotte, Roland, Best, D., Buta, A., Maazouzi, C., Leifels, Y., Legrand, I., Lebedev, A., Kuhn, C., Caplar, R., Hong, B., Cindro, N., Berek, G., Belyaev, I., Bastid, N., Basrak, Z., Amouroux, V., Alard, J. P., Jundt, F., Hölbling, S., Fodor, Z., Hildenbrand, K. D., Herrmann, N., Häfele, E., Guillaume, G., Gobbi, A., Göbels, G., Manko, V., Fraysse, L., Kecskemeti, J., Fintz, P., Eskef, M., Dzelalija, M., Dupieux, P., Dona, R., Crochet, P., Coffin, J. P., Genoux-Lubain, A., Wienold, T., Wohlfarth, Dietrich, Trzaska, M., Plettner, Christoph, Zhilin, A., Schüll, D., Yatsunenko, Y., Kirejczyk, M., Wang, G. S., Mösner, Jürgen, Vasiliev, M. A., Neubert, W., Korolija, M., Wagner, P., Siwek-Wilczynska, K., Somov, A., Sodan, U., Seres, Z., Simion, V., Sikora, B., Roy, C., Ritman, J. L., Reisdorf, W., Rami, F., Pras, P., Merlitz, H., Pinkenburg, C., Petrovici, M., Pelte, D., Mohren, S., Tizniti, L., Biegansky, J., Kotte, Roland, Best, D., Buta, A., Maazouzi, C., Leifels, Y., Legrand, I., Lebedev, A., Kuhn, C., Caplar, R., Hong, B., Cindro, N., Berek, G., Belyaev, I., Bastid, N., Basrak, Z., Amouroux, V., Alard, J. P., Jundt, F., Hölbling, S., Fodor, Z., Hildenbrand, K. D., Herrmann, N., Häfele, E., Guillaume, G., Gobbi, A., Göbels, G., Manko, V., Fraysse, L., Kecskemeti, J., Fintz, P., Eskef, M., Dzelalija, M., Dupieux, P., Dona, R., Crochet, P., Coffin, J. P., Genoux-Lubain, A., Wienold, T., Wohlfarth, Dietrich, Trzaska, M., Plettner, Christoph, Zhilin, A., Schüll, D., Yatsunenko, Y., Kirejczyk, M., Wang, G. S., Mösner, Jürgen, Vasiliev, M. A., Neubert, W., Korolija, M., and Wagner, P.

Abstract

Small-angle correlations of Proton pairs produced in central Ni+Ni collisions at a beam energy of 1.93 AGeV are investigated with the FOPI detector System at GSI Darmstadt. A well-defined emission source is selected by triggering on central events which comprise about 8% of the total cross section. Simultaneous comparison of longitudinal and transverse correlation functions with the predictions of the Koonin model allows to unravel the space-time ambiguity of the emission process. Taking into account the strong collactive expansion of the participant zone, which introduces a reduction of the extracted source radius of more than 30% r.m.s. radius and emission time parameters of Rrms = ( 4.2 ± 1.2) fm and trms = (11+7-5) fm/c are extracted, respectively. In contrast, the analysis of the angle-integrated correlation function gives an upper limit Rrms = (7.0 ± 1.4) fm of the source radius.

Published
2010

44. Velocity correlations of intermediate mass fragments produced in central collisions of Au + Au at E = 150 A MeV

Author

Kämpfer, Burkhard, Grigorian, Y., Herrmann, N., Fraysse, L., Fintz, P., Fodor, Z., Blaich, Th., Bastid, N., Frolov, S., Basrak, Z., Freifelder, R., Guillaume, G., Gobbi, A., Cerruti, C., Hildenbrand, K. D., Jorio, M., Reisdorf, W., Alard, J. P., Wohlfarth, Dietrich, Krämer, M., Mösner, Jürgen, Legrand, I., Kotte, Roland, Koncz, P., Petrovici, M., Vasiliev, M. A., Belayev, I. M., Teh, K., Sodan, U., Smolyankin, S., Simion, V., Sikora, B., Seres, Z., Schüll, D., Wessels, J. P., Rami, F., Wagner, P., Morel, P., Montbel, I., Montaru, G., Moisa, D., Mgebrishvili, G., Matulewicz, T., Manko, V., Maguire, C., Lebedev, A., Kuhn, C., Sadchikov, A., Coffin, J. P., Hölbling, S., Houari, A., Jeong, S. C., Fan, Z. G., Jundt, F., Kecskemeti, J., Buta, A., Trzaska, M., Cindro, N., Wienold, T., Dupieux, P., Pelte, D., Wilhelmi, Z., Korchagin, Y., Tezkratt, R., Zhilin, A. L., Neubert, Waldemar, Erö, J., Caplar, R., Kämpfer, Burkhard, Grigorian, Y., Herrmann, N., Fraysse, L., Fintz, P., Fodor, Z., Blaich, Th., Bastid, N., Frolov, S., Basrak, Z., Freifelder, R., Guillaume, G., Gobbi, A., Cerruti, C., Hildenbrand, K. D., Jorio, M., Reisdorf, W., Alard, J. P., Wohlfarth, Dietrich, Krämer, M., Mösner, Jürgen, Legrand, I., Kotte, Roland, Koncz, P., Petrovici, M., Vasiliev, M. A., Belayev, I. M., Teh, K., Sodan, U., Smolyankin, S., Simion, V., Sikora, B., Seres, Z., Schüll, D., Wessels, J. P., Rami, F., Wagner, P., Morel, P., Montbel, I., Montaru, G., Moisa, D., Mgebrishvili, G., Matulewicz, T., Manko, V., Maguire, C., Lebedev, A., Kuhn, C., Sadchikov, A., Coffin, J. P., Hölbling, S., Houari, A., Jeong, S. C., Fan, Z. G., Jundt, F., Kecskemeti, J., Buta, A., Trzaska, M., Cindro, N., Wienold, T., Dupieux, P., Pelte, D., Wilhelmi, Z., Korchagin, Y., Tezkratt, R., Zhilin, A. L., Neubert, Waldemar, Erö, J., and Caplar, R.

Published
2010

45. Charged pions from Ni on Ni collisions between 1 and 2 AGeV

Author

Pelte, D., Eskef, M., Goebels, G., Häfele, E., Herrmann, N., Korolija, M., Merlitz, H., Mohren, S., Trzaska, M., Alard, J. P., Amouroux, V., Andronic, A., Basrak, Z., Bastid, N., Belyaev, I., Best, D., Biegansky, J., Buta, A., Caplar, R., Cindro, N., Coffin, J. P., Crochet, P., Dupieux, P., Dzelalija, M., Erö, J., Fintz, P., Fodor, Z., Genoux-Lubain, A., Gobbi, A., Guillaume, G., Hildenbrand, K. D., Hong, B., Jundt, F., Kecskemeti, J., Kirejczyk, M., Koncz, P., Korchagin, Y., Kotte, R., Kuhn, C., Lambrecht, D., Lebedev, A., Legrand, I., Leifels, Y., Manko, V., Mösner, J., Moisa, D., Neubert, W., Petrovici, M., Pinkenburg, C., Pras, P., Rami, F., Ramillien, V., Reisdorf, W., Vasiliev, M. A., Wagner, P., Wang, G. S., Wienold, T., Wohlfarth, D., and Zhilin, A.

Published
1997

46. Charged pion productionin Au on Au collisions at 1 AGeV

Author

Pelte, D., Häfele, E., Best, D., Goebels, G., Herrmann, N., Pinkenburg, C., Reisdorf, W., Trzaska, M., Cindro, N., Coffin, J. P., Crochet, P., Dupieux, P., Dzelalija, M., Erö, E., Eskef, M., Fintz, P., Fodor, Z., Genoux-Lubain, A., Gobbi, A., Guillaume, G., Hildenbrand, K. D., Hong, B., Jundt, F., Kecskemeti, J., Kirejczyk, M., Koncz, P., Korolija, M., Korchagin, Y., Kotte, R., Kuhn, C., Lambrecht, D., Lebedev, A., Legrand, I., Leifels, Y., Manko, V., Merlitz, H., Mösner, J., Mohren, S., Moisa, D., Neubert, W., Petrovici, M., Siwek-Wilczynska, K., Smolyankin, V., Sodan, U., Vasiliev, M. A., Wagner, P., Wang, G. S., Wienold, T., Wohlfarth, D., and Zhilin, A.

Subjects
ENERGY, MODEL, QUANTUM MOLECULAR-DYNAMICS, Nuclear Theory, NUCLEUS-NUCLEUS COLLISIONS, TRANSVERSE-MOMENTUM, COLLECTIVE EXPANSION, FRAGMENT FORMATION, HEAVY-ION COLLISIONS, Nuclear Experiment, AU+AU COLLISIONS, PARTICLE-EMISSION
Abstract

Charged pions are measured with the 4 pi detector FOPI at GSI using the Au on Au reaction at 1.06 AGeV bombarding energy. The pion multiplicities n(pi) increase with the number of participants A(part). The average pion multiplicities per participant are / = 0.0308 and / = 0.0182. These values are only half as large as extrapolated from the low-mass systems studied by Harris et al. The ratio n(pi-)/n(pi+) increases with A(part) and decreases with the pion kinetic energies. The pion kinetic energy spectra have concave shapes, their parametrization in terms of thermal Boltzmann distributions yields a low (T-l,T- pi) and high (T-h,T- pi) temperature which change with the cm emission angle Theta of the pions. In the angular range 45 degrees < Theta < 135 degrees the low temperature is larger than , the high temperatures , are, within experimental uncertainties, the same. The inclusive polar angular distributions of pions are anisotropic, d sigma/d Omega increases for forward and backward angles. The forward - backward enhancements are independent of the pion kinetic energies or the number of participants. In addition to the preferred forward - backward emission, also the enhanced emission into the transverse direction Theta = 90 degrees is observed for pions with high energies or for pions from near-central collisions. These observations and the shape of the rapidity spectra suggest that pions, emitted from the central rapidity region, are partly rescattered by spectator matter. The strength of the rescattering process depends only weakly on the number of participants. The experimental data are compared to the results of IQMD/GEANT calculations using momentum dependent NN interactions and a hard equation of state. The calculated pion multiplicities are approximately 50% larger than experimentally determined; the existence of secondary pion sources is reproduced by the calculation, but their predicted strengths are larger than experimentally observed.

Published
1997

47. Out-of-plane emission of nuclear matter in Au+Au collisions between 100 and 800 A MeV

Author

Bastid, N., Buta, A., Crochet, P., Dupieux, P., Petrovici, M., Rami, F., Alard, J. P., Amouroux, V., Basrak, Z., Belyaev, I., Best, D., Biegansky, J., Blaich, T., Caplar, R., Cerruti, C., Cindro, N., Coffin, J. P., Dona, R., Dzelalija, M., Erö, E., Fan, Z. G., Fintz, P., Fodor, Z., Fraysse, L., Freifelder, R. P., Gobbi, A., Guillaume, G., Herrmann, N., Hildenbrand, K. D., Hölbling, S., Hong, B., Jeong, S. C., Jundt, F., Keczkemeti, J., Kirejczyk, M., Koncz, P., Korchagin, Y., Kotte, R., Krämer, M., Kuhn, C., Lebedev, A., Legrand, I., Leifels, Y., Maazouzi, C., Manko, V., Mgebrishvili, G., Moisa, D., Mösner, J., Neubert, W., Pelte, D., Pinkenburg, C., Pras, P., Reisdorf, W., Ritman, J. L., Roy, C., Sadchikov, A. G., Schüll, D., Seres, Z., Sikora, B., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Sodan, U., Teh, K. M., Tizniti, L., Trzaska, M., Vasiliev, M., Wagner, P., Wang, G. S., Wessels, J. P., Wienold, T., Wisniewski, K., Wohlfarth, D., and Zhilin, A.

Subjects
NUCLEAR REACTIONS Au (Au,X), deduced in-plane to out-of-plane emission transition signature, E = 100-800 MeV/nucleon, transverse momentum, Nuclear Experiment, measured fragment azimuthal anisotropy vs collision centrality, incident energy, fragment charge
Abstract

We present new experimental results concerning the azimuthal distributions of proton-likes, light and intermediate mass fragments at midrapidity for Au(100-800 A MeV)+Au collisions measured with the FOPI phase-I detector at GSI in Darmstadt. The azimuthal distributions are investigated as a function of the collision centrality, the incident energy, the fragment charge and transverse momentum. The azimuthal anisotropy is maximum for impact parameters around 7 fm. Intermediate mass fragments present a stronger out-of-plane emission signal than light fragments and a saturation is reached for Z 4. The azimuthal anisotropy increases with the fragment transverse momentum and decreases as the incident energy increases. The azimuthal anisotropy of Z = 2 particles investigated as a function of the scaled fragment transverse momentum follows an universal curve for bombarding energies between 250-800 A MeV. A signature for a transition from in-plane to out-of-plane emission is evidenced at the lowest beam energies.

Published
1997

48. Onset of nuclear matter expansion in Au + Au collisions

Author

Crochet, P., Rami, F., Gobbi, A., Dona, R., Coffin, J.P., Fintz, P., Guillaume, G., Jundt, F., Kuhn, C., Roy, C., De Schauenburg, B., Tizniti, L., Wagner, P., Alard, J-P., Amouroux, V., Andronic, A., Basrak, Z., Bastid, N., Belyaev, I., Best, D., Biegansky, J., Buta, A., Caplar, R., Cindro, N., Dupieux, P., Dzelalija, M., Fan, Z.G., Fodor, Z., Fraysse, L., Freifelder, R.P., Herrmann, N., Hildenbrand, K.D., Hong, B., Jeong, S.C., Kecskemeti, J., Kirejczyk, M., Koncz, P., Korolija, M., Kotte, R., Lebedev, A., Leifels, Y., Manko, V., Moisa, D., Mosner, J., Neubert, W., Pelte, D., Petrovici, M., Pinkenburg, C., Pras, P., Ramillien, V., Reisdorf, W., Ritman, J.L., Sadchikov, A.G., Schull, D., Seres, Z., Sikora, B., Simion, V., Siwek-Wilczynska, K., Sodan, U., Teh, K.M., Trzaska, M., Vasiliev, M., Wang, G.S., Wessels, J.P., Wienold, T., Wisniewski, K., Wohlfarth, D., Zhilin, A., Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and FOPI

Subjects
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment
Abstract

Using the FOPI detector at GSI Darmstadt, excitation functions of collective flow components were measured for the Au+Au system, in the reaction plane and out of this plane, at seven incident energies ranging from 100AMeV to 800AMeV. The threshold energies, corresponding to the onset of sideward-flow (balance energy) and squeeze-out effect (transition energy), are extracted from extrapolations of these excitation functions toward lower beam energies for charged products with Z>2. The transition energy is found to be larger than the balance energy. The impact parameter dependence of both balance and transition energies, when extrapolated to central collisions, suggests comparable although slightly higher values than the threshold energy for the radial flow. The relevant parameter seems to be the energy deposited into the system in order to overcome the attractive nuclear forces.

Published
1997

49. Central collisions of Au on Au at 150, 250 and 400 A.MeV

Author

Reisdorf, W., Best, D., Gobbi, A., Herrmann, N., Hildenbrand, K.D., Hong, B., Jeong, S.C., Leifels, Y., Pinkenburg, C., Ritman, J.L., Schull, D., Sodan, U., Teh, K., Wang, G.S., Wessels, J.P., Wienold, T., Alard, J-P., Amouroux, V., Basrak, Z., Bastid, N., Belyaev, I.M., Berger, L., Biegansky, J., Bini, M., Boussange, S., Buta, A., Caplar, R., Cindro, N., Coffin, J.P., Crochet, P., Dona, R., Dupieux, P., Dzelalija, M., Ero, J., Eskef, M., Fintz, P., Fodor, Z., Fraysse, L., Genoux-Lubain, A., Goebels, G., Guillaume, G., Grigorian, Y., Hafele, E., Holbling, S., Houari, A., Ibnouzahir, M., Jorio, M., Jundt, F., Kecskemeti, J., Kirejczyk, M., Koncz, P., Korchagin, Y., Korolija, M., Kotte, R., Kuhn, C., Lambrecht, D., Lebedev, A., Legrand, I., Maazouzi, C., Manko, V., Matulewicz, T., Maurenzig, P.R., Merlitz, H., Mgebrishvili, G., Mosner, J., Mohren, S., Moisa, D., Montarou, Gerard, Montbel, I., Morel, Pierre, Neubert, W., Olmi, A., Pasquali, G., Pelte, D., Petrovici, M., Poggi, G., Pras, P., Rami, F., Ramillien, V., Roy, C., Sadchikov, A., Seres, Z., Sikora, B., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Taccetti, N., Tezkratt, R., Tizniti, L., Trzaska, M., Vasilev, M.A., Wagner, P., Wisniewski, K., Wohlfarth, D., Zhilin, A.V., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and FOPI

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

Collisions of Au on Au at incident energies of 150, 250 and 400 A MeV were studied with the FOPI-facility at GSI Darmstadt. Nuclear charge (Z 16) and velocity of the products were detected with full azimuthal acceptance at laboratory angles of 1-30 degrees. Isotope separated light charged particles were measured with movable multiple telescopes in an angular range of 6-90 degrees. Central collisions representing about 1 % of the reaction cross section were selected by requiring high total transverse energy, but vanishing sideflow. The velocity space distributions and yields of the emitted fragments are reported. The data are analysed in terms of a thermal model including radial flow. A comparison with predictions of the Quantum Molecular Model is presented.

Published
1997

50. Azimuthal anisotropies as stringent test for nuclear transport models

Author

Crochet, P., Rami, F., Dona, R., Coffin, J. P., Fintz, P., Guillaume, G., Jundt, F., Kuhn, C., Roy, C., Schauenburg, B., Tizniti, L., Wagner, P., Alard, J. P., Andronic, A., Basrak, Z., Bastid, N., Belyaev, I., Bendarag, A., Berek, G., Best, D., Biegansky, J., Buta, A., Caplar, R., Cindro, N., Dupieux, P., Dzelalija, M., Fan, Z. G., Fodor, Z., Fraysse, L., Freifelder, R. P., Gobbi, A., Herrmann, N., Hildenbrand, K. D., Hong, B., Jeong, S. C., Kecskemeti, J., Kirejczyk, M., Koncz, P., Korolija, M., Kotte, R., Lebedev, A., Leifels, Y., Manko, V., Moisa, D., Mösner, J., Neubert, W., Pelte, D., Petrovici, M., Pinkenburg, C., Reisdorf, W., Ritman, J. L., Sadchikov, A. G., Schüll, D., Seres, Z., Sikora, B., Simion, V., Siwek-Wilczynska, K., Sodan, U., Teh, K. M., Trzaska, M., Wang, G. S., Wessels, J. P., Wienold, T., Wisniewski, K., Wohlfarth, D., and Zhilin, A.

Published
1997

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