µSR Study of Proton-Irradiated Aluminum and Copper at Low Temperatures
A search for muon trapping at lattice defects in proton-irradiated aluminum and copper in a μSR-experiment is reported. Thin foils have been irradiated at 77 K with 4 MeV protons to a total dose of 2 × 1015 particles cm−2 resulting in a defect concentration of approximately 80 ppm for Cu and 30 ppm for Al. No trapping of muons is observed below 300 K in both targets. An upper limit for the trapping rate of 0.5 μs−1 is derived.
Physics Letters A
Digital Object Identifier (DOI)
O. Echt, H. Graf, E. Holzschuh, E. Recknagel, A. Weidinger and Th. Wichert, µSR Study of Proton-Irradiated Aluminum and Copper at Low Temperatures, Phys. Lett. 67A (1978) 427