Experiments on the nuclear interactions of pions and electrons. Progress report

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

DOI:https://doi.org/10.2172/10185560· OSTI ID:10185560

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: USDOE, Washington, DC (United States)
• DOE Contract Number: FG05-88ER40390
• OSTI ID: 10185560
• Report Number(s): DOE/ER/40390--5; ON: DE93001800
• Country of Publication: United States
• Language: English

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