Pulse height defects for 16O, 35Cl and 81Br ions in silicon surface barrier detectors

Energy Loss by keV Ions in Silicon

“…Over the entire velocity range, the different H and He isotopes have the same value of f E at the same incident velocity, indicating the absence of an isotope effect. Figure 2 shows data from this study as well as higher energy results from earlier studies: Ne [19], Si [20], Ar [19], Br [21], Ni [22], Ag [22], Au [22], and U [22]. Over a broad range of ion species and energies (1 keV H to 26 MeV U ) the experimental values of f E fall close to the line representing Eq.…”

“…Similar to Fig. 1, this figure includes data (colored symbols) from earlier studies [19][20][21][22] for heavy ions at high energies derived using silicon solid state detectors operated in a single particle counting mode. The open circles represent the data of Fig.…”

Stopping power of helium gas for 9Be ions from 2 to 31MeV

“…The main contributions to the PHD come from the energy loss in the detector dead layer (the window defect) and the energy loss in non-ionizing processes in the active layer (the nuclear defect), see e.g. [15]. These effects lead to a non-linear and ion-dependent detector response.…”

Charge collection inefficiencies induced by intense /sup 12/C bombardment of SSB detectors

“…Large PHDs are quite common for very heavy ions such as fission fragments [1]- [3], but early measurements for lighter ions seemed to indicate negligible effects [2], [4]. In more recent works [5], [6], [25], [7]- [10], however, it has been established that small deviations from linearity occur also for light ions, as light as . Opposite to observations with the high-Z fission fragments, the detector ouput seems to increase with Z for the lighter ions at low energies [6], [25], [9].…”

“…After dead-layer corrections using standard energy-loss calculations, a scheme seemed to emerge where nonlinearities in the detector response were ascribed to a Z dependence of the average energy required to produce an electron-hole pair in the case of low-Z ions [6], [25], [9], while nonionizing collisions and electron-hole recombination [4], [5] seemed to be the dominant contribution for heavier nuclei. In more recent works [12], [13], however, the last two phenomena are claimed to account by themselves for all the observed nonlinearities, either for light or heavy ions.…”