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The 330 type lead shield is designed for the Ge detector. It prevents external sources from producing high background counts, thereby reducing counting time and improving minimum detection limits. The structure of the 777 type lead chamber is compact and easy to use, and a convenient lever can easily start the upper cover of the lead room, and the precise design completely blocks the direct path of the ray entry. Only 0.4CM2 ground space is occupied. 1 mm tin and 1.6 mm copper sub liner prevent the interference of lead X rays. The exterior is beautifully polished with light grey corrugated paint, covered with bright polyimide ester, oxidation resistant and easy to clean. The bottom of the shield has a diameter of 11.4 cm, which can accommodate a thermostat with flanges or cables.
The operation of the probe into the lead room is to open the top door of the lead room, remove the cold finger from the liquid nitrogen bottle, unlock the positioning frame of the probe car, push the liquid nitrogen bottle placed on the probe vehicle from the front to the bottom of the seat frame, and make the bottle mouth open to the middle hole in the bottom of the chamber, fix the position frame of the probe car, and then pass the cold finger from the top door through the bottom middle hole. Carefully insert it back into the liquid nitrogen bottle and close the door. According to the opposite procedure, the probe can be removed from the lead chamber.
■ Provide a lead shield with a thickness of 10cm
■A unique easy to use lever to start the lead door
■Only 0.4CM2 ground space is occupied and the design is compact
■A tin - copper lining with a segmented interior
■The adjustable foot pad can be used to meet the needs of different liquid nitrogen tanks.
■Low carbon steel with coat - 9.5 mm thick
■Low background lead, which is shielded by the body - 10cm thick,
■Segment lining 1 mm low background tin and 1.6 mm copper.
■Weight about 1.1 tons; transportation weight of about 1.2 tons