0000000001115919

AUTHOR

V. Kleber

showing 2 related works from this author

Exclusive measurement of quasi-free η-photoproduction from deuterium

2003

Quasi-free photoproduction of eta-mesons from the deuteron has been measured at the tagged photon facility of the Mainz microtron MAMI with the photon spectrometer TAPS for incident photon energies from the production threshold at 630 MeV up to 820 MeV. In a fully exclusive measurement eta-mesons and recoil nucleons were detected in coincidence. At incident photon energies above the production threshold on the free nucleon, where final state interaction effects are negligible, an almost constant ratio of sigma(n)/sigma(p)=0.66+/-0.10 was found. At lower incident photon energies the ratio rises due to re-scattering effects. The average ratio agrees with the value extracted from a comparison …

interaction [photon p]0.63-0.82 GeVNuclear and High Energy Physicstagged beam [photon]Photoninteraction [photon n]ProtonNuclear Theoryeffect [nucleon resonance]FOS: Physical sciences7. Clean energy01 natural sciencesResonance (particle physics)energy dependenceexperimental results [spectrometer]Nuclear physicsMainz Linacphoton deuteron --> eta n pRecoil0103 physical sciencesddc:530recoil [nucleon]NeutronNuclear Experiment (nucl-ex)ratio [channel cross section]spectator [model]Nuclear Experiment010306 general physicsNuclear ExperimentMicrotronQCPhysicsphotoproduction [eta]010308 nuclear & particles physicsmultiple scatteringphoton deuteron --> eta anythingangular dependenceDeuteriuminteraction [photon deuteron]High Energy Physics::ExperimentAtomic physicsNucleonThe European Physical Journal A
researchProduct

Double- π0 photoproduction from the deuteron

2000

The photoproduction of two neutral pions from the deuteron has been studied for incident photon energies from 200 MeV to 820 MeV with the TAPS spectrometer at MAMI (Mainz Microtron). The total cross-section was determined and used to deduce the cross-section from the neutron. Due to the good statistical quality of the data Dalitz plots for the three particles in the exit channel (pi (0)pi N-0) could be constructed. The invariant mass distributions derived from them are presented in this paper. They indicate that the important reaction mechanism in the second resonance region is a sequential decay pattern involving the population of the Delta (1232)-resonance as an intermediate state.

PhysicsNuclear and High Energy Physicseducation.field_of_study010308 nuclear & particles physicsNuclear TheoryHadronPopulation01 natural sciencesResonance (particle physics)Nuclear physicsPionDeuterium0103 physical sciencesNeutronInvariant massAtomic physicsNuclear Experiment010306 general physicseducationMicrotronThe European Physical Journal A
researchProduct