Gamma response of Radix W in the dose range of 1kGy to 10kGy was investigated using a readout wavelength of 280nm. The dose response curve was linear, and the residuals of calibration curve were within about 5%. Besides, coefficients of variation at different doses were within 1%. The influence of irradiation temperature on the dose response was negligibly small in the range of 10-30°C. Influence of post-irradiation temperature was less than 3% at 5%°C-30°C even after 12 hour storage. Therefore, Radix W enables to measure precisely doses in the range of 1kGy-150kGy by choosing suitably two different readout wavelengths, 320nm for 5kGy-150kGy and 280nm for 1kGy-10kGy. Radix W can be applied to practical use in industrial radiation processing.