[X-ray dosimetry using SAMOS type read-only memory].
An X-ray dosimeter has been investigated with the use of a PROM of a SAMOS (stacked gate avalanche injection type MOS) structure. The SAMOS is employed as a memory IC. The SAMOS is different from a FAMOS (floating gate avalanche injection type MOS) in the presence of a control gate, with the use of this electrode, the analog amount of electrical charge accumulated in the floating gate can be measured. The X-ray dose can be determined by decreasing the amount of electron injected into floating gate by avalanche effect through X-ray irradiation. This dosimeter shows good linearity and flat energy response. The dosimeter has no effect on fading.
Yoshimura
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A
Radioisotope Center, Kyushu University, Fukuoka-shi, Japan.
D011874:Radiometry / Q000295:instrumentation*; D012984:Software; D014965:X-Rays