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Article
Strange meson production in Al+Al collisions at 1.9 A GeV
The production of K+, K- and \( \phi\) (1020) mesons is studied in Al+Al collisions at a beam energy of 1.9A GeV which ...
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Article
Two-proton small-angle correlations in central heavy-ion collisions: A beam-energy- and system-size-dependent study
Small-angle correlations of pairs of protons emitted in central collisions of Ca + Ca, Ru + Ru and Au + Au at beam energies from 400 to 1500MeV per nucleon are investigated with the FOPI detector system at SIS...
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Article
Dilepton and double-photon production in proton—Proton scattering at 190 MeV
The first high-statistics measurement of dilepton and double-photon yields in proton—proton scattering below the pion threshold has been performed. The data obtained allow a detailed study of off-shell effects...
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Chapter and Conference Paper
Virtual Bremsstrahlung in Proton-Proton Scattering
The virtual bremsstrahlung process, in addition to the real photon bremsstrahlung, provides an elaborate tool for studying the nucleon-nucleon interaction. The additional degree of freedom which exists in the ...
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Article
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?
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 var...
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Article
On the space-time difference of proton and composite particle emission in central heavy-ion reactions at 400 A· MeV
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 A· MeV are investigated with the FOPI dete...
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Article
Identification of baryon resonances in central heavy-ion collisions at energies between 1 and 2 AGeV
The mass distributions of baryon resonances populated in near-central collisions of Au on Au and Ni on Ni are deduced by defolding the pt spectra of charged pions by a method which does not depend on a specific ...
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Article
Resonances and fluctuations in the 16O + 15N and 12C + 19F collisions
The search and study of quasi-molecular resonances in the 31P composite system populated via two entrance channels are performed with two different experimental techniques. The 16O + 15N reaction products have be...
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Article
Charged pion production in Au on Au collisions at 1 AGeV The FOPI Collaboration
Charged pions are measured with the 4π detector FOPI at GSI using the Au on Au reaction at 1.06 AGeV bombarding energy. The pion multiplicities ngp increase with the number of participants Apart. The average pion...
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Article
Shape of collective flow in highly central Au(150 A MeV)+Au collisions
Using the FOPI facility at GSI, charged particles (1 ≤Z≤6) produced in the Au(150 A MeV)+Au reaction have been measured at laboratory angles 1.20 < Θlab < 300. Highly central collisions have been ...
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Article
Neutron-to-proton ratios in heavy-ion reactions
An expression for determining then/p ratio in heavy-ion reactions has been tested using recently published data. The agreement between the calculated and measured ratios is satisfactory.
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Article
On the transverse momentum distribution of strange hadrons produced in relativistic heavy ion collisions
Particles with strange quark content produced in the system 1.93A·GeV58Ni on58Ni have been investigated at GSI Darmstadt with the FOPI detector system. The correlation of these produced particles was analyzed wit...
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Article
On the resonant behavior of the16O+15N reaction
The 16 O+ 15 N reaction products have been studied by the γ-ray detection method in the CM energy range 15.5 to 36.1 MeV and by the kinematical coincidence method at energies ranging from E CM
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Article
Preequilibrium emission in (p, x n) reactions on palladium isotopes
Energy spectra of neutrons from the104, 105, 106, 108, 110pd(p, xn) reactions atE p=26.1 MeV have been measured using the time-of-flight technique with good overall energy resolution (< 250 keV). The hard part of...
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Article
Systematics of coalescence radii for light-fragment emission from energetic heavy-ion collisions
The refined coalescence model has been applied to the analysis of triton and helion (3He) spectra from various heavy-ion colliding systems atE inc/A∼(15÷25) MeV/nucleon. The results show that the obtained coalesc...
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Article
23Na+23Na fusion with unpolarized and aligned beams
Fusion cross sections for the23Na+23Na entrance channel were measured at beam energies between 80 and 177 MeV by detecting the evaporation residues from the compound nucleus46Ti. Additionally the tensor analyzing...
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Article
Multiple-source analysis of inclusive proton spectra from58Ni +60Ni Collisions at 876.5 MeV
Experimental inclusive proton spectra of58Ni+60Ni at 15.1 MeV/u have been decomposed using three moving sources associated with, respectively, equilibrium, deep-inelastic, and preequilibrium processes. For the la...
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Article
Isotopic effects in the (n, p) reaction cross section on heavy targets and the statistical preequilibrium model
The systematic decrease in (n,p) cross sections with increasing neutron number for isotopes in reactions induced by 14 MeV neutrons on heavy targets is explained in terms of the preequilibrium model. The relevant...
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Chapter and Conference Paper
Search for intermediate structure in 36Ar via the 24Mg(12C,α)32S reaction
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Article
A consistent study of precompound and compound-nucleus emission mechanisms in neutron-induced reactions
The exciton model in its closed form and the Weisskopf-Ewing model have been consistently applied to neutron-induced reactions. The analysis has been performed for 12 nuclei in the rangeA=45–209. The primary part...
