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Analysis of the sequential fission observed in collisions of100Mo +100Mo and120Sn +120Sn around 20 A·MeV (1995)

Stefanini, A. A. ; Casini, G. ; Maurenzig, P. R. ; [weitere]

Springer

The European physical journal 351 (1995), S. 167-186

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ISSN: 1434-601X

Schlagwort(e): 25.70.Lm ; 25.85.−w

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Events with 2, 3 and 4 heavy fragments (A≥20) detected in the reactions100Mo +100Mo at 18.7, 23.7 A·MeV and120Sn +120Sn at 18.4 A·MeV were analyzed by means of an improved version of the kinematic coincidence method. The phase-space distributions prove that 3- (and possibly 4-) body events predominantly originate from a two-step mechanism and are compatible with the hypothesis of a binary deep-inelastic interaction followed by the further fissionlike decay of one (or both) of the primary fragments. The characteristics of the fission step — mass asymmetry, relative velocity, in-plane and out-of-plane angles — have been reconstructed for the 3-body events and indications are found that nonequilibrium effects at the end of the deep-inelastic phase may influence the fissionlike decay.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01289527

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Digitale Medien

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? (2000)

Wiśniewski, K. ; Crochet, P. ; Herrmann, N. ; [weitere]

Springer

The European physical journal 9 (2000), S. 515-519

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ISSN: 1434-601X

Schlagwort(e): PACS. 25.75.-q Relativistic heavy-ion collisions – 25.75.Dw Particle and resonance production

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract: The ratio of K- to K+-meson yields has been measured in the systems 96Ru + 96Ru at 1.69 A GeV, 96Ru+96Zr at 1.69 A GeV, and 58Ni+58Ni 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.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/s100500070008

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