Subjects: Physics >> Nuclear Physics submitted time 2024-02-28
Yang yuxuan
Zhang Yue
Zhao Weijuan
Wang Hongwei
Fan Gongtao
Xu Hanghua
Liu Longxiang
Hao Zirui
Li Zhicai
Jin Sheng
Chen Kaijie
Jiao Pu
Zhou Mengdie
Wang Zhenwei
Abstract： Shanghai Laser Electron Gamma Source (SLEGS) is a quasi-monoenergetic, and energy-tunable MeV gamma-rays source generated by the inverse Laser Compton Scattering (LCS) of lasers and electrons. SLEGS is the only LCS gamma source in the world with a continuously variable collision angular range. The gamma activation analysis is one of the effective methods to study the properties of materials. This paper introduces the gamma activation platform of SLEGS, including the online activation experiment, the low background offline measurement, and the energy and efficiency calibration for the high purity germanium (HPGe) detector. The counting rate of the shielded HPGe has been controlled down to 5.2 cps/s within 60 keV-3 MeV region under the current low background environment. The activation platform of the SLEGS has provided favorable conditions for gamma activation measurements, which will play an important role in future research in the fields of nuclear physics, nuclear astrophysics, medical applications, materials science, and environmental science.
Subjects: Physics >> Nuclear Physics submitted time 2024-02-16
Yang Yuxuan
Wang Hongwei
Zhao Weijuan
Zhang Yue
Li Zhicai
Hao Zirui
Chen Kaijie
Wang Zhenwei
Sun Qiankun
Fan Gongtao
Xu Hanghua
Liu Longxiang
Abstract： The Shanghai Laser Electron Gamma Source(SLEGS) has delivered a quasi-monochromatic, continuously energy-tunable gamma-ray beam. Based on the photon activation analysis(PAA) method, SLEGS has built and developed a photon activation analysis platform, including online activation and offline low-background HPGe detector measurement systems, as an alternative to direct measurement methods and a cross-tests at low throughput. Due to the short half-lives spanning from minutes to days and characteristics such as ease of fabrication, cost-effectiveness, and stability, gold (197Au) and zinc (64Zn) emerge as favorable activation targets in the gamma-ray beam flux monitor. Notably, their utility shows a multitude of advantages in monitoring the gamma-ray beam flux typically 105 photons/s with the energy of 13.16 to 19.08 MeV under the condition of the 3 mm coarse collimator. Especially in high-flux $\gamma$-ray beam experiments can be well applied.
Peer Review Status:
Awaiting Review
Hits
YES
Hits
Downloads
Comment