28 Result(s)

Article

The high-acceptance dielectron spectrometer HADES

HADES is a versatile magnetic spectrometer aimed at studying dielectron production in pion, proton and heavy-ion-induced collisions. Its main features include a ring imaging gas Cherenkov detector for electron...

G. Agakichiev, C. Agodi, H. Alvarez-Pol, E. Atkin… in The European Physical Journal A (2009)

Article

Measurement of charged pions in ¹²C + ¹²C collisions at 1 A GeV and 2 A GeV with HADES

We present the results of a study of charged-pion production in ¹²C + ¹²C collisions at incident beam energies of 1A GeV and 2A GeV using the HADES spectrometer at GSI. The main emphasis of the HADES program is o...

G. Agakishiev, C. Agodi, A. Balanda, G. Bellia… in The European Physical Journal A (2009)

Article

Beta decay of ⁵⁰Ni

The very neutron-deficient isotope ⁵⁰Ni was produced in fragmentation reactions between a \(650\cdot\) A MeV ⁵⁸Ni beam and a ⁹Be target. For the first time the decay of this nucl...

C. Mazzocchi, E. Badura, C. Bingham… in The European Physical Journal A - Hadrons … (2003)

Article

First evidence for the two-proton decay of ⁴⁵Fe

Decays of five ⁴⁵Fe atoms have been observed at the fragment separator of GSI. Whereas one event is consistent with the β-decay of ⁴⁵Fe accompanied by the emission of a 10 MeV proton, four decays are consistent w...

M. Pfützner, E. Badura, C. Bingham, B. Blank… in The European Physical Journal A - Hadrons … (2002)

Article

Observation of Δ⁺→ pπ⁰ decay in heavy-ion collisions

T. Matulewicz, L. Aphecetche, Y. Charbonnier… in The European Physical Journal A - Hadrons … (2000)

Article

Systematic study of low-mass electron pair production in p–Be and p–Au collisions at 450 GeV/ \(c\)

In a joint effort the CERES/NA45 and TAPS collaborations have measured low-mass electron pairs in p–Be and p–Au collisions at 450 GeV/ \(c\) at the CERN SPS. In the range covere...

G. Agakichiev, M. Appenheimer, R. Averbeck… in The European Physical Journal C - Particle… (1998)

Article

Neutral meson production in p-Be and p-Au collisions at 450 GeV beam energy

In a joint experiment the TAPS and CERES collaborations have studied the production of the neutral mesons \(\pi^\circ,\eta\) and \(\omega\) i...

G. Agakichiev, M. Appenheimer, R. Averbeck… in The European Physical Journal C - Particle… (1998)

Article

The study of neutral pion azimuthal distribution in ⁵⁸Ni+⁵⁸Ni reaction at 2 GeV/nucleon

In order to study the anisotropic azimuthal emission of mesons in heavy ion collisions we measured the neutral pions emitted in the Ni+Ni collisions at 2 GeV/u with respect to the reaction plane. We studied th...

A. Taranenko, P. Tlustý, A. Kugler, V. Wagner… in Czechoslovak Journal of Physics (1997)

Article

Observation of antihydrogen production in flight at CERN

The observation of the production of antihydrogen atoms \overlineH ⁰\equiv\barpe⁺, the simplest atomic bound state of antimatter, is presented.

G. Baur, G. Boero, S. Brauksiepe, A. Buzzo, W. Eyrich, R. Geyer… in Hyperfine Interactions (1997)

Article

Mass and Γ_3π0/Γ_γγ decay branching ratio of theη-meson from the p(γ, η)p reaction

Near threshold photoproduction ofη-mesons from the proton has been measured at the MAMI accelerator with the TAPS spectrometer. The mass of theη-meson was deduced from the threshold energy forη-photoproduction. T...

B. Krusche, J. Ahrens, I. Anthony, G. Anton… in Zeitschrift für Physik A Hadrons and Nuclei (1995)

Article

Neutron emission from Bi+Pb collisions at 1 GeV/u

The experimental study of the neutron emission from Bi+Pb collisions at 1 GeV/u was done using BaF₂ detector. The heavy-ion collision dynamics was investigated through genuine collective phenomena: nuclear flow e...

M. Pachr, A. Kugler, V. Wagner, M. Šumbera… in Czechoslovak Journal of Physics (1995)

Article

Evidence for a two-phonon octupole vibrational state in²⁰⁸Pb

Collective properties of^206,208Pb have been investigated with gamma-ray spectroscopy using nuclear and electromagnetic excitation by²⁰⁸Pb projectiles. From the measurement of particle-particle-γ and particle-part...

H. J. Wollersheim, P. Egelhof, H. Emling… in Zeitschrift für Physik A Hadrons and Nuclei (1992)

Article

Total decay-energy measurement in the fusion reactions⁹⁰Zr(⁸⁹Y,p)¹⁷⁸Pt and⁹⁰Zr(⁸⁹Y, α)¹⁷⁵Ir

In the fusion reactions⁹⁰Zr(⁸⁹Y,p)¹⁷⁸Pt and⁹⁰Zr(⁸⁹Y,α)¹⁷⁵Ir the sum energy of all emittedγ rays as well as the energy of the promptly emitted charged particle were measured. From these data the mass-excess values...

T. Brohm, H. -G. Clerc, U. Gollerthan… in Zeitschrift für Physik A Hadrons and Nuclei (1991)

Article

β ⁺-endpoint measurements near¹⁰⁰Sn and¹⁴⁶Gd

With a summation-free β⁺-endpoint spectrometer the β⁺-decay energies of¹⁰⁴Sn,¹⁴⁷Tb,^{148, 149}Dy,¹⁴⁹Ho,¹⁵⁰Er, and¹⁵¹Tm were remeasured with improved accuracy. Combined with known proton and alpha decay energies, the...

H. Keller, R. Kirchner, O. Klepper… in Zeitschrift für Physik A Hadrons and Nuclei (1991)

Article

Neutral meson production in relativistic heavy ion collisions

The production ofπ ⁰ andη mesons has been studied in the reactions²⁰Ne +Al at 350 MeV/u and⁴⁰Ar + Ca at 1.0 GeV/u. Rapidity distributions and transverse momentum spectra have been measured and are compared to the...

F. D. Berg, A. Boonstra, H. P. Braak… in Zeitschrift für Physik A Hadrons and Nuclei (1991)

Article

Large electron polarization of H-like²⁰Ne-ions traversing gd foils at very high velocities

It is shown that transient magnetic fields in Gd-host for²⁰Ne ions at a mean velocity of 12.5v₀(v₀=c/137), considerably beyond the Bohr velocity of 1s electrons of Ne ions (v_1s=10v₀), are dominated by the Fermi c...

K. -H. Speidel, J. Cub, U. Reuter, F. Passek… in Zeitschrift für Physik A Hadrons and Nuclei (1991)

Article

Decay of the compound nucleus¹⁷⁹Au formed in the cold fusion reaction⁹⁰Zr+⁸⁹Y

For the compound nucleus¹⁷⁹Au formed at an excitation energy of 26 MeV in the fusion reaction⁹⁰Zr+⁸⁹Y, the energy spectra of promptly emitted protons,α particles andγ rays were measured in concidence with the eva...

U. Gollerthan, T. Brohm, H. -G. Clerc… in Zeitschrift für Physik A Hadrons and Nuclei (1991)

Article

Measurement ofg-factors in¹⁶⁰Yb by aγ-γ coincidence technique

Aγ-γ coincidence technique has been developed forg-factor measurements of short-lived nuclear states. The method involvesγ-detection in 4π geometry as well as transient magnetic fields and the recoil-distance tec...

E. Lubkiewicz, H. Emling, H. Grein, R. Kulessa… in Zeitschrift für Physik A Atomic Nuclei (1990)

Article

Neutral pion production at 350 MeV/u in the system²⁰Ne +²⁷Al

π⁰ -production probability of (9± 2)· 10^{− 3} per²⁰Ne+Al reaction has been measured at 350 MeV/u using the Two Arm Photon Spectrometer TAPS. This yield is consistent with an interpolation of published π-production ...

F. D. Berg, M. Pfeiffer, O. Schwalb… in Zeitschrift für Physik A Atomic Nuclei (1990)

Article

Measurements of transient magnetic fields on single-electron Ni-ions

Measurements were performed to determine the transient magnetic field assoclated with polarized is electrons of highly-stripped Ni ions traversing a ferromagnetic Fe layer. Partiele γ angular correlations and ...

K. -H. Speidel, J. Cub, M. Knopp, H. -J. Simonis… in Hyperfine Interactions (1990)