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We present measurements of mechanical vibrations induced by 0.6 GeV electronsimpinging on cylindrical and spherical aluminium resonators. To monitor theamplitude of the resonator's vibrational modes we used piezoelectric ceramicsensors, calibrated by standard accelerometers. Calculations using thethermo-acoustic conversion model, agree well with the experimental data, asdemonstrated by the specific variation of the excitation strengths with theabsorbed energy, and with the traversing particles' track positions. For thefirst longitudinal mode of the cylindrical resonator we measured a conversionfactor of 7.4 +- 1.4 nm/J, confirming the model value of 10 nm/J. Also, for thespherical resonator, we found the model values for the L=2 and L=1 modeamplitudes to be consistent with our measurement. We thus have confirmed theapplicability of the model, and we note that calculations based on the modelhave shown that next generation resonant mass gravitational wave detectors canonly be expected to reach their intended ultra high sensitivity if they will beshielded by an appreciable amount of rock, where a veto detector can reduce thebackground of remaining impinging cosmic rays effectively.Comment: Tex-Article with epsfile, 34 pages including 13 figures and 5 tables.  To be published in Rev. Scient. Instr., May 200

Measurement of mechanical vibrations excited in aluminum resonators by 0.6 GeV electrons