摘要
本文计算了天然放射性同位素产生的MCP噪声(以A/cm^2表示)。计算结果给出:Rb^(87)产生的噪声最大,K^(40)次之;最小为La^(138)和V^(50)。这表明:某些应用领域要求低噪声或超低噪声的MCP时,则该MCP的皮料中不能含有天然放射性同位素Rb^(87)或K^(40)。
MCP noise caused by nature radioactive isotopes is calculated. The calculated results of MCP noise caused by Rb87 and K40 are in the order of 10-13A/cm2 and 10-14A/cm2 respectively. They show that in some special applications, MCP free of Rb37 and K40 are needed.
