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Kurilkin P, Akishin P, Bychkov A, Floch E, Gusakov Y, Ladygin V, Malakhov A, Moritz G, Ramakers H, Senger P, Shabunov A, Szwangruber P, Toral F. Superconducting dipole magnet for the CBM experiment at FAIR. EPJ Web Conf 2017. [DOI: 10.1051/epjconf/201713812001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Senger P. Exploring nuclear matter at neutron star core densities. Proceedings of the Indian National Science Academy 2015. [DOI: 10.16943/ptinsa/2015/v81i1/48085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Scheinast W, Böttcher I, Debowski M, Dohrmann F, Förster A, Grosse E, Koczoń P, Kohlmeyer B, Laue F, Menzel M, Naumann L, Schwab E, Senger P, Shin Y, Ströbele H, Sturm C, Surówka G, Uhlig F, Wagner A, Waluś W, Kämpfer B, Barz HW. In-medium effects on phase space distributions of antikaons measured in proton-nucleus collisions. Phys Rev Lett 2006; 96:072301. [PMID: 16606077 DOI: 10.1103/physrevlett.96.072301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2005] [Indexed: 05/08/2023]
Abstract
Differential production cross sections of K+/- mesons have been measured in p + C and p + Au collisions at 1.6, 2.5, and 3.5 GeV proton beam energy. At beam energies close to the production threshold, the K- multiplicity is strongly enhanced with respect to proton-proton collisions. According to microscopic transport calculations, this enhancement is caused by two effects: the strangeness exchange reaction NY --> K- NN and an attractive in-medium K- N potential at saturation density.
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Affiliation(s)
- W Scheinast
- Forschungszentrum Rossendorf, D-01314 Dresden, Germany
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Uhlig F, Förster A, Böttcher I, Debowski M, Dohrmann F, Grosse E, Koczoń P, Kohlmeyer B, Laue F, Menzel M, Naumann L, Oeschler H, Scheinast W, Schwab E, Senger P, Shin Y, Ströbele H, Sturm C, Surówka G, Wagner A, Waluś W. Observation of different azimuthal emission patterns of K+ and of K- mesons in heavy-ion collisions at 1-2 A GeV. Phys Rev Lett 2005; 95:012301. [PMID: 16090609 DOI: 10.1103/physrevlett.95.012301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2004] [Indexed: 05/03/2023]
Abstract
Azimuthal distributions of pi+, K+, and K- mesons have been measured in Au+Au reactions at 1.5A GeV and Ni+Ni reactions at 1.93 A GeV. In semicentral collisions at midrapidity, pi+ and K+ mesons are emitted preferentially perpendicular to the reaction plane in both collision systems. In contrast for K- mesons in Ni+Ni reactions, an in-plane elliptic flow was observed for the first time at these incident energies.
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Affiliation(s)
- F Uhlig
- Technische Universität Darmstadt, D-64289 Darmstadt, Germany
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Förster A, Uhlig F, Böttcher I, Debowski M, Dohrmann F, Grosse E, Koczoń P, Kohlmeyer B, Laue F, Menzel M, Naumann L, Oeschler H, Scheinast W, Schwab E, Senger P, Shin Y, Ströbele H, Sturm C, Surówka G, Wagner A, Waluś W. First evidence for different freeze-out conditions for kaons and antikaons observed in heavy-ion collisions. Phys Rev Lett 2003; 91:152301. [PMID: 14611460 DOI: 10.1103/physrevlett.91.152301] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2002] [Indexed: 05/24/2023]
Abstract
Differential production cross sections of K- and K+ mesons have been measured in Ni+Ni and Au+Au collisions at a beam energy of 1.5 A GeV. The K(-)/K(+) ratio is found to be nearly constant as a function of the collision centrality and system size. The spectral slopes and the polar emission pattern differ for K- and K+ mesons. These observations indicate that K+ mesons decouple earlier from the fireball than K- mesons.
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Affiliation(s)
- A Förster
- Technische Universität, Darmstadt, D-64289 Darmstadt, Germany
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Schümann F, Hammache F, Typel S, Uhlig F, Sümmerer K, Böttcher I, Cortina D, Förster A, Gai M, Geissel H, Greife U, Iwasa N, Koczoń P, Kohlmeyer B, Kulessa R, Kumagai H, Kurz N, Menzel M, Motobayashi T, Oeschler H, Ozawa A, Płoskoń M, Prokopowicz W, Schwab E, Senger P, Strieder F, Sturm C, Sun ZY, Surówka G, Wagner A, Waluś W. Coulomb dissociation of 8B and the low-energy cross section of the 7Be(p,gamma)8B solar fusion reaction. Phys Rev Lett 2003; 90:232501. [PMID: 12857251 DOI: 10.1103/physrevlett.90.232501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2003] [Indexed: 05/24/2023]
Abstract
An exclusive measurement of the Coulomb breakup of 8B into 7Be+p at 254A MeV allowed the study of the angular correlations of the breakup particles. These correlations demonstrate clearly that E1 multipolarity dominates and that E2 multipolarity can be neglected. By using a simple single-particle model for 8B and treating the breakup in first-order perturbation theory, we extract a zero-energy S factor of S17(0)=18.6+/-1.2+/-1.0 eV b, where the first error is experimental and the second one reflects the theoretical uncertainty in the extrapolation.
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Affiliation(s)
- F Schümann
- Institut für Physik mit Ionenstrahlen, Ruhr-Universität Bochum, D-44780 Bochum, Germany
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Sturm C, Böttcher I, D&ecedil;bowski M, Förster A, Grosse E, Koczoń P, Kohlmeyer B, Laue F, Mang M, Naumann L, Oeschler H, Pühlhofer F, Schwab E, Senger P, Shin Y, Speer J, Ströbele H, Surówka G, Uhlig F, Wagner A, Waluś W. Evidence for a Soft Nuclear Equation-of-State from Kaon Production in Heavy-Ion Collisions. Phys Rev Lett 2001; 86:39-42. [PMID: 11136088 DOI: 10.1103/physrevlett.86.39] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2000] [Indexed: 05/23/2023]
Abstract
The production of pions and kaons has been measured in 197Au+197Au collisions at beam energies from 0.6 to 1.5A GeV with the kaon spectrometer at SIS/GSI. The K+ meson multiplicity per nucleon is enhanced in Au+Au collisions by factors up to 6 relative to C+C reactions, whereas the corresponding pion ratio is reduced. The ratio of the K+ meson excitation functions for Au+Au and C+C collisions increases with decreasing beam energy. This behavior is expected for a soft nuclear equation-of-state.
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Affiliation(s)
- C Sturm
- Technische Universität Darmstadt, D-64289 Darmstadt, Germany
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Wagner A, Muntz C, Oeschler H, Sturm C, Barth R, Cieslak M, D&ecedil;bowski M, Grosse E, Koczon P, Laue F, Mang M, Miskowiec D, Schwab E, Senger P, Beckerle P, Brill D, Shin Y, Strobele H, Walus W, Kohlmeyer B, Puhlhofer F, Speer J, Yoo IK. Emission pattern of high-energy pions: A new probe for the early phase of heavy-Ion collisions. Phys Rev Lett 2000; 85:18-21. [PMID: 10991148 DOI: 10.1103/physrevlett.85.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/1999] [Indexed: 05/23/2023]
Abstract
The emission pattern of charged pions has been measured in Au+Au collisions at 1 GeV/nucleon incident energy. In peripheral collisions and at target rapidities, high-energy pions are emitted preferentially towards the target spectator matter. In contrast, low-energy pions are emitted predominantly in the opposite direction. The corresponding azimuthal anisotropy is explained by the interaction of pions with projectile and target spectator matter. This interaction with the spectator matter causes an effective shadowing which varies with time during the reaction. Our observations show that high-energy pions stem from the early stage of the collision whereas low-energy pions freeze out later.
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Affiliation(s)
- A Wagner
- Technische Universitat Darmstadt, D-64289 Darmstadt, Germany
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Elmér R, Berg M, Carlén L, Jakobsson B, Norén B, Oskarsson A, Ericsson G, Julien J, Thorsteinsen T, Guttormsen M, Lovhoiden G, Bellini V, Grosse E, Müntz C, Senger P, Westerberg L. K+ Emission in Symmetric Heavy Ion Reactions at Subthreshold Energies. Phys Rev Lett 1996; 77:4884-4886. [PMID: 10062659 DOI: 10.1103/physrevlett.77.4884] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Miskowiec D, Ahner W, Barth R, Cieslak M, Debowski M, Grosse E, Henning W, Koczon P, Schicker R, Schwab E, Senger P, Baltes P, Müntz C, Oeschler H, Sartorius S, Sturm C, Wagner A, Beckerle P, Bormann C, Brill D, Shin Y, Stein J, Stock R, Ströbele H, Kohlmeyer B, Pöppl H, Pühlhofer F, Speer J, Völkel K, Walus W. Observation of enhanced subthreshold K+ production in central collisions between heavy nuclei. Phys Rev Lett 1994; 72:3650-3653. [PMID: 10056255 DOI: 10.1103/physrevlett.72.3650] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Brill D, Ahner W, Baltes P, Barth R, Bormann C, Cieslak M, Debowski M, Grosse E, Henning W, Koczon P, Kohlmeyer B, Miskowiec D, Müntz C, Oeschler H, Pöppl H, Pühlhofer F, Sartorius S, Schicker R, Senger P, Shin Y, Speer J, Stein J, Stiebing K, Stock R, Ströbele H, Völkel K, Wagner A, Walus W. Azimuthally anisotropic emission of pions in symmetric heavy-ion collisions. Phys Rev Lett 1993; 71:336-339. [PMID: 10055245 DOI: 10.1103/physrevlett.71.336] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Krämer M, Blank B, Boek E, Ditzel E, Kankeleit E, Klotz-Engmann G, Müntz C, Oeschler H, Rhein M, Senger P. delta -electron spectroscopy, a tool to study the dynamics of heavy-ion collisions. Phys Rev C Nucl Phys 1989; 40:1662-1676. [PMID: 9966153 DOI: 10.1103/physrevc.40.1662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Krieg R, Boek E, Gollerthan U, Kankeleit E, Klotz-Engmann G, Krämer M, Meyer U, Oeschler H, Senger P. Reaction dynamics studied via positron and electron spectroscopy. Phys Rev C Nucl Phys 1986; 34:562-575. [PMID: 9953488 DOI: 10.1103/physrevc.34.562] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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