A cargo loading apparatus and method tightly and efficiently disperse material pieces such as wood chips into a cargo space. In particular, it was discovered that doping of cadmium tungstate with trivalent metal ions or monovalent metal ions is particularly effective in improving radiation hardness of the scintillator material. The holding units include a base and a plurality of walls formed unitarily therewith to cooperatively define at least one receptacle. Hyaluronic acid is a constituent of the extracellular matrix of the skin and responsible for space filling, tissue repair and retention of moisture. The low resistance trench structure facilitates forming a shallow source region that reduces the gate-to-source capacitance.