Figure 1
The maximum feasible depths for (a) transmission and (b) reflection for a generic neutron source and various synchrotron X-ray sources, based on an acquisition time of 1 h for neutron measurements, using a sampling gauge of 40 mm3, and based on a peak to background ratio of 1 and a sampling volume of 1 mm3 for synchrotron X-rays. Other parameters were extracted from preliminary experiments, as described in Table 1 and part I (Withers, 2004). |