Experiments on the nuclear interactions of pions and electrons. [Dept. of Physics, Univ. of Virginia]

Technical Report · Sat Aug 01 04:00:00 EDT 1992

DOI:https://doi.org/10.2172/6912450· OSTI ID:6912450

Minehart, R C; Ziock, K O.H.

The analysis of the deuterium content in the CD target used in an experiment to study the [pi] + d [yields] 2p reaction at incident pion energies from 4 to 20 MeV was completed. The final paper describing this experiment will be submitted for publication this summer. Analysis of LAMPF Exp. on pion absorption in [sup 4]He is continuing. In 1991, we collaborated with D. Pocanic from the Univ. of Virginia on a measurement at LAMPF of the [pi][sup 0] production in [pi] + p interactions. This run proved the validity of the method and additional data were obtained in a second run during the summer of 1992, using a new target. Current collaborations at LAMPF include the search for the decay [mu][sup +] [yields] e[sup +] + [gamma](MEGA) and a measurement of the Michel [rho] parameter in the decay [mu] [yields] e + v + v. A U.Va.--PSI collaboration is measuring pion beta decay to an accuracy of less than 1%, using a large acceptance CsI detector to measure the [pi][sup 0] following decay of stopped [pi][sup +] mesons. Most of the U.Va. effort is devoted to the CEBAF Large Acceptance Spectrometer (CLAS) program to the construction of the CLAS forward calorimeter. An apparatus to measure the properties of the scintillators with light from a N[sub 2] laser was built in the spring of 1992. The electronic circuitry for the energy signal from the EGN detector and the circuitry needed to route the signals from the all the photomultipliers to the TDC and ADC circuits are being developed. Experimental proposals for the study of electroproduction of nucleon resonances at CEBAF, including measurements with polarized beam and targets, are being developed.

• Research Organization: Virginia Univ., Charlottesville, VA (United States). Dept. of Physics
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG05-88ER40390
• OSTI ID: 6912450
• Report Number(s): DOE/ER/40390-5; ON: DE93001800
• Country of Publication: United States
• Language: English

Related Subjects

440104 -- Radiation Instrumentation-- High Energy Physics Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
662350 -- Decays of Mesons-- (1992-)
662370* -- Decays of Leptons-- (1992-)
663460 -- Meson- & Hyperon-induced Reactions & Scattering-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BARYONS
BOSONS
CAPTURE
CHARGED-PARTICLE REACTIONS
DECAY
DISTRIBUTION
DOCUMENT TYPES
ELECTRONIC CIRCUITS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRON REACTIONS
HADRONS
HELIUM 4 TARGET
LEPTONS
MASSLESS PARTICLES
MATTER
MEASURING INSTRUMENTS
MESON REACTIONS
MESONS
MEV RANGE
MEV RANGE 100-1000
MUONS
MUONS PLUS
NEUTRINOS
NEUTRONS
NUCLEAR PHYSICS
NUCLEAR REACTIONS
NUCLEONS
PARTICLE DECAY
PHOTONS
PHYSICS
PION PLUS REACTIONS
PION REACTIONS
PIONS
PIONS NEUTRAL
PIONS PLUS
POSITRONS
PROGRESS REPORT
PROTONS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
RESEARCH PROGRAMS
SEMILEPTONIC DECAY
SHOWER COUNTERS
TARGETS
WEAK HADRONIC DECAY
WEAK PARTICLE DECAY