摘要
In 2017,the main research activities of Nuclear Data Research Group were focused on nuclear data measurements,calculations and fundamental research in heavy ion reactions.Some important results have been obtained.For the centrality CsI array,which is going to be used in experiments at the IMP,active bases have been studied[1].In the array,Hamamatsu R1924A tubes are used.The active bases with two different sets of resistor chains were tested and compared by a frequency-controlled green straw hat LED light.The temperature of the active base with smaller resistances reaches about twice of that of the active base with larger resistances in the resistor chain.For the applications in vacuum,the active base with resistance between the two sets of resistor chains may be preferable.
