SENSITIVITY AND FADING CHARACTERISTICS OF THE 25-MU-M PIXEL SIZE IMAGING PLATE FOR TRANSMISSION ELECTRON-MICROSCOPES

The sensitivity and fading characteristics of the new IF, which had a pixel size of 25 mu m x 25 mu m, were measured to calibrate the read-o ut intensity in quantitative analysis and to estimate the read-out eff iciency of an IP-reader, The sensitivity showed good linearity in elec tron dose and a wide dynamic range of about five orders, However, the effective dynamic range was restricted to about four orders under one gain condition of the IP-reader. The fading characteristic of the new IP was independent of the electron intensity, and the decrease of the read-out intensity due to the fading was smaller than with the old IP which had a pixel size of 50 mu m 50 mu m. Furthermore, the fading cha racteristic caused by repeated read-out was independent of the electro n intensity, and the read-out intensity did not reach zero after read- out was repeated 10 times.