Ground-state energy of beryllium atom with parameter perturbation method<xref rid="cpb_27_9_093101_fn1" ref-type="fn">*</xref><fn id="cpb_27_9_093101_fn1"><label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant No. 11647071) and the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20160435).</p></fn>

Ground-state energy of beryllium atom with parameter perturbation method**

Project supported by the National Natural Science Foundation of China (Grant No. 11647071) and the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20160435).

Wu Feng^†, Meng Lijuan

(color online) Three-dimensional plot of the ground-state energy of the Be atom with perturbation parameters.