TY - Chin. Phys. Lett. A1 - Qing Liu, Jiguang Li, Jianguo Wang, and Yizhi Qu T1 - Effect of Electron Correlation and Breit Interaction on Energies, Oscillator Strengths, and Transition Rates for Low-Lying States of Helium Y1 - 2021-10-11 JF - Chinese Physics Letters JO - Chin. Phys. Lett. SP - 113101EP - VL - 38 IS - 11 UR - https://cpl.iphy.ac.cn N1 - 10.1088/0256-307X/38/11/113101 ER -