Advances in constant-velocity Mössbauer Instrumentation

A. VEIGA; N. MARTINEZ; P. MENDOZA ZÉLIS; G. PASQUEVICH; F. SANCHEZ

Montpellier, Francia

Conferencia; International Conference on the Application of the Mössbauer Effect; 2005

A prototype for a programmable constant-velocity scaler is presented. Used in conjunction with a standard SCA, transducers and servo amplifiers, a high-quality constant-velocity Mössbauer spectrometer can be built. This instrument allows the acquisition of partial Mössbauer spectra in selected energy regions using standard drivers and transducers. It can be fully operated by a remote application, thus data acquisition can be automated. The instrument consists of a programmable counter and a constant-velocity reference. The reference waveform generator is amplitude modulated with 13 bit resolution, and is programmable in a wide range of frequencies and waveforms in order to optimize the performance of the transducer. The counter is compatible with most standard SCA, and is configured as a rate-meter that provides counts per selectable time slice at the programmed velocity.