Recycling and reusing method of cement concrete waste

Inventor name used in this publication: 潘智生Inventor name used in this publication: 占宝剑Inventor name used in this publication: 玄东兴Title in Traditional Chinese: 一種水泥混凝土廢棄物的回收再利用方法China202212 bcchVersion of Recor

beta-decay study of the T-z =-2 proton-rich nucleus Mg-20

The beta decay of the drip-line nucleus Mg-20 gives important information on key astrophysical resonances in 20Na, which are relevant to the onset of the rapid proton capture process. A detailed beta-decay spectroscopic study of 20Mg was performed by a continuous-implantation method. A detection system was specially developed for charged-particle decay studies, giving improved spectroscopic information including the delayed proton energies, the half-life of 20Mg, the excitation energies, the branching ratios, and the log ft values for the states in Na-20 populated in the beta decay of Mg-20. A new proton branch was observed and the corresponding excited state in 20Na was proposed. The large isospin asymmetry for the mirror decays of Mg-20 and O-20 was also well reproduced. To resolve the long-standing problem about the astrophysically interesting 2645 keVresonance in Na-20 convincingly, a higher-statistics measurement may still be needed.National Basic Research Program of China [2013CB834404]; National Natural Science Foundation of China [11375268, 11475263, U1432246, U1432127, 11505293, 11635015]SCI(E)ARTICLE19