The experiment was carried out at the lawrence berkeley national laboratory ( u . s . a ) . a 252cf was placed at the center of the gammasphere detector array which , for this experiment , consisted of 102 compton - suppressed ge detectors . by measuring prompt - ray of spontaneous fission from 252cf , a total of 5 . 7 1011 triple - and higher - fold coincidence events were collected 实验工作是在美国洛仑兹伯克利国家实验室（ lbnl ）的gammasphere探测装置上完成的， 252cf自发裂变源放置在一个由102个反康ge探测器组成的gammasphere探测器阵列的中心，测量自发裂变产生的瞬发谱，记录三重以上的符合事件。
It realizes the functions of storing and transferring the information of fire alarm , displaying time , scanning keyboards , the safe maintenance of system and so on . the part of wireless communication is controlled by at89c2051 mcu , mainly realizing transmitting and receiving data between controller and other detectors . the external signals received by a wireless module are transmitted to mcu through shaping circuit , and the signals of mcu are transmitted by a wireless module through tone modulation circuit 人机交互部分以单片机c8051f020为核心,为用户提供一个良好的操作环境,实现了火灾报警信息的存储及调用、时间的显示、键盘的扫描、系统的安全维护等功能;无线通信部分由单片机at89c2051来控制,主要实现控制器与其它探测装置之间信号的无线发射和接收,无线通讯模块接收到的外部信号经过整形电路送入单片机,单片机发出的信号经过音频调制再由无线通讯模块发送出去,这样实现了数据的无线传输;本文还从节能的角度出发,兼顾性能的可靠性,提出了一种合理的无线火灾报警的信息传输模式。
