应用于兰州重离子加速器上的ps级和ns级寿命测量装置的研制

本项目是研制应用于兰州重离子加速器上的ps级和ns级寿命测量装置，研究内容是在兰州重离子加速器的实验终端上发展多普勒反冲距离法和快时间延迟符合法等寿命测量技术，并建成相应的ps级和ns级寿命测量装置。这些装置建成后在兰州重离子加速器上将具备开展ps级和ns级原子核激发态寿命测量的能力，扩展了该大科学装置实验终端的探测技术与手段，为一大批过去未能涉及的短寿命激发态寿命测量提供了可能，特别是通过对一些远离稳定线核素的寿命测量能更深入的开展相关的物理研究工作，如壳层结构的消失和反转岛附近的原子核集体行为等核物理研究的热点，可以说该装置的建成对促进我国核物理研究的发展有重要作用。

The project will develop picosecond and nanosecond lifetime measurement device is used at the heavy ion accelerator of the Institute of Modern Physics, Lanzhou. The research content is to develop the recoil distance Doppler-Shift method and the Fast-time delayed coincidence method and other lifetime measurement techniques on the experimental terminal of the heavy ion accelerator in Lanzhou , and to construct the corresponding picosecond and nanosecond lifetime measurement device. After the completion of these devices, the Heavy Ion Accelerator have the ability to carry out measurements of picosecond and nanosecond lifetime of nuclear excited states in Lanzhou. Extends the detection technology and means of the experimental terminal of the large scientific facilities, For a large number the short excited state lifetime in the past unable involve measurements may be provided, Especially for some of far from the stable line isotope lifetime measurement can carry out more in-depth research work related to physics, Such as the disappearance of shell structure and Collective behavior of nuclei near the island reversal，etc. The completion of the device plays a very important role the development of nuclear physics research in China.