Brief introduction: China institute of metrology institute of ionizing radiation in the production of LB2008 2 low background alpha beta measuring instrument has two independent low background alpha beta main detector, can test two samples at the same time, are two samples of total alpha, beta activity concentration measurement. With high sensitivity, low background and characteristics of simple structure, convenient operation, stable and reliable. Can match any type of computer, the system of data collection and processing, high pressure and the adjustment of the threshold value, the measurement process control are completed by computer. LB2008 type low background alpha beta measuring instrument can be used for radiation protection and environmental samples, water, medicine and health care, agriculture science, nuclear power plant, the reactor, isotope production, geological exploration and other fields in alpha beta measurement of total activity. Can also be used for nuclear war and nuclear explosion field of contaminated water, air, food, soil total alpha beta radioactivity specific activity measurement. Technical indicators: 1. The instrument for 90 sr - 90 y beta source (20 mm) active area Φ 2 PI detection efficiency ratio of 50% or higher: The bottom 0.15 cm or less - 2 min - 1; 2. The apparatus for 239 pu alpha source (active area Φ 25 mm) than the two PI efficiency of 80% or higher: The bottom 0.005 cm or less - 2 min - 1; 3. The alpha/beta crossover performance: alpha into beta count than < 2% (239 pu) Beta into the alpha channel count than < 0.5% (about 90 sr - 90 y); 4. Efficiency stability: instrument electricity 24 hours continuously, alpha detector efficiency changes < 3%, Beta < 5%; 5. Background: stability within 24 hours of measurement, the background count change should be in the range of (Nb + 3 sigma), which is suitable for the average of the background count, Nb sigma standard error for the background count. 6. Pressure insulation > 1500 v. 7. 2 m or higher insulation resistance Ω;
Brief introduction: China institute of metrology institute of ionizing radiation in the production of LB2008 2 low background alpha beta measuring instrument has two independent low background alpha beta main detector, can test two samples at the same time, are two samples of total alpha, beta activity concentration measurement. With high sensitivity, low background and characteristics of simple structure, convenient operation, stable and reliable. Can match any type of computer, the system of data collection and processing, high pressure and the adjustment of the threshold value, the measurement process control are completed by computer. LB2008 type low background alpha beta measuring instrument can be used for radiation protection and environmental samples, water, medicine and health care, agriculture science, nuclear power plant, the reactor, isotope production, geological exploration and other fields in alpha beta measurement of total activity. Can also be used for nuclear war and nuclear explosion field of contaminated water, air, food, soil total alpha beta radioactivity specific activity measurement.
