Particle physics experiments

China publishes results of first batch of experiments with world’s most powerful underground accelerator


Jinping underground laboratory in China Photo: cnsphoto

The China Jinping Underground Laboratory (CJPL), China’s first deep underground astrophysics experiment project in southwest China’s Sichuan Province, on Saturday released the results of its first batch of experiments, demonstrating that China’s nuclear astrophysics has reached the highest international levels, making China the third country in the world with the ability to conduct deep underground nuclear astrophysics research.

The measurement sensitivity and statistical precision of the first four published nuclear astrophysics experimental results are superior to other similar devices in the world. The results achieved maximum exposure, the widest energy range, and the highest sensitivity measured directly from international nuclear astrophysics.

For the CJPL project team, the innovative results obtained in the experiments indicate that the powerful underground nuclear astrophysics accelerator developed by the team has become an experimental platform with significant influence in this field, placing China at the center. of nuclear astrophysics for the first time.

Michael Witcher, former president of the American Nuclear Astrophysics Union, Roland Dyer, director of the European Laboratory for Radiation Astrophysics, and Toshiki Ono, assistant professor at the National Astronomical Observatory of Japan, sent congratulations and greetings, respectively. thank you video.

Located in Jinping Mountain, Liangshan Yi Autonomous Prefecture in Sichuan, Jinping Underground Laboratory is currently the deepest underground laboratory in the world, covering 2,400 meters of vertical rock. In 2010, the lab was officially commissioned, filling the void that has hitherto existed in China’s deep underground labs.

It was determined that the flux of cosmic rays in the Jinping underground laboratory can be reduced from 1/10 millionth to 1/100 millionth of the ground level, making it the underground laboratory with the lowest flux of cosmic rays and the deepest rock cover in the world. In order to better perform the direct measurement of key reactions in nuclear astrophysics, the Chinese Institute of Atomic Energy led the installation and operation of the underground accelerator deep in the laboratory, in collaboration with major national institutions. and foreign.

Nuclear astrophysics is one of the frontiers of basic scientific research and has been listed as an important field in the long-term development plan of physics in China. Measurements of celestial nuclear reactions based on deep underground laboratories can provide the most basic and precise experimental data for further research.

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