具有高能量分辨大灵敏面积电离室的△E－E望远镜

△E-E TELESCOPE WITH HIGH ENERGY RESOLUTION LARGE SENSITIVE AREA IONIZATION CHAMBER

报道了有效厚度１１ｃｍ、窗口面积１６００ｍｍ￣２的△Ｅ－Ｅ望远镜的结构及特性。台式实验中用α源测量了△Ｅ探测器（屏栅电离室）的性能，得到最佳△Ｅ分辨为４．６％。

The construction and the performances of △E-E telescope with active thick 11 cm and win-dow area l600 mm￣2 are described.△E detector is Frisch ionization chamber. The performances of△E detector utilizing￣(239)Pu-α source is tested.The optimum △E resolution obtained is 4.6%。