Ion spectroscopy : a diamond characterization tool

The stopping power Delta E and the energy-loss resolution delta E/Delta E of Single-Crystal CVD-Diamond Detectors (SC-DDs) measured with relativistic Heavy Ions (HIs) are interpreted as global quality parameters, characterizing simultaneously crystal texture and carrier-trapping concentrations, as well as the charge-transport properties of intrinsic diamond samples. HI spectra are presented, where spectral lines are obtained similar to the predictions of the Lindhard and Sorensen (LS) theory [J. Lindhard, A.H. Sorensen, Phys. Rev. A 53 (1996) 2443]. The spectroscopic results indicate an almost defect free material, and spatial homogeneity of all parameters relevant to the detector signal (i.e., mass density, dielectric constant, drift mobility and velocity of the charge carriers). Measured and simulated transient current signals generated by relativistic Xe-132 ions are discussed according to theories [A. Many, G. Rakavy, Phys. Rev., 126 (1962) 1980: G. Juska, M. Viliunas. O. Klima, E. Sipek. J. Kocka, Phil, Mag. B 69 (1994) 277; G. Juska, M. Viliunas, K. Arlauskas, J. Kocka, Phys. Rev. B 51 (1994) 16 668] of space-charge limited current (SCLC) transients. The evidence of the spectroscopic results is confirmed by the current-mode studies, and thus indirectly, the potential of the characterization method as well.