The drift behavior of charge carriers, generated by 𝛼-particles of a reference ²⁴¹Am-source, in electronic grade,
single crystal chemical vapor deposition (scCVD) diamond was investigated by the transient current technique
(TCT) from room temperature up to ≈ 473 K. Furthermore, the 𝛼-spectroscopic behavior was analyzed in terms
of charge collection and spectroscopic resolution for the same temperature range. All conducted measurements
revealed complete charge collection up to the maximum temperature. The electron–hole-pair creation energies
were derived from the TCT as well as from the spectroscopic measurements. The herein presented results imply that high temperature 𝛼-spectroscopy with diamond-based semiconductor solid state detectors, using presently available scCVD sensor substrates, is feasible at least up to 473 K. Only at the highest applied  temperature, the conducted TCT measurements showed distorted signal traces, indicating a uniform positive space charge built-up.