TABLE III: The calculated charge radii (in fm) for selected spherical nuclei by PC-PK1 in com- parison with data [24, 25] and those by DD-PC1 [15], PC-F1 [11], PC-LA [10], and NL3* [28]. The bold-faced quantities denote that the experimental values of the corresponding nuclei are used in the parametrization fitting. The root mean square (rms) deviation Δ = N ∑ i √ ( r exp i − r cal i ) $^{2}$/N and the root of relative square (rrs) deviation δ = N ∑ i √ ( r exp i − r cal i ) $^{2}$/ ( r exp i ) 2 N are respectively listed in the last two rows. Nuclei Exp. PC-PK1 DD-PC1 PC-F1 PC-LA NL3* $^{16}$O 2.737 2.7677 2.7472 2.7633 2.7528 2.7352 $^{40}$Ca 3.4852 3.4815 3.4566 3.4777 3.4678 3.4704 $^{42}$Ca 3.5125 3.4805 3.4626 3.4778 3.4729 3.4672 $^{44}$Ca 3.5231 3.4826 3.4709 3.4809 3.4810 3.4672 $^{46}$Ca 3.5022 3.4865 3.4806 3.4860 3.4912 3.4693 $^{48}$Ca 3.4837 3.4890 3.4895 3.4906 3.5023 3.4705 $^{50}$Ti 3.573 3.5558 3.5696 3.5664 3.5868 3.5442 $^{58}$Ni 3.7827 3.7372 3.7761 3.7645 3.8065 3.7399 $^{88}$Sr 4.2036 4.2247 4.2231 4.2269 4.2379 4.2159 $^{90}$Zr 4.2720 4.2695 4.2664 4.2724 4.2847 4.2636 $^{92}$Mo 4.3170 4.3125 4.3140 4.3192 4.3333 4.3087 $^{112}$Sn 4.5957 4.5801 4.5894 4.5870 4.6044 4.5753 $^{116}$Sn 4.6257 4.6121 4.6174 4.6168 4.6307 4.6039 $^{122}$Sn 4.6633 4.6561 4.6579 4.6549 4.6728 4.6430 $^{124}$Sn 4.6739 4.6694 4.6714 4.6677 4.6864 4.6554 $^{138}$Ba 4.8348 4.8508 4.8511 4.8494 4.8667 4.8369 $^{140}$Ce 4.8774 4.8879 4.8879 4.8871 4.9037 4.8748 $^{144}$Sm 4.9525 4.9544 4.9521 4.9547 4.9676 4.9484 $^{202}$Pb 5.4772 5.4908 5.4869 5.4892 5.4996 5.4825 $^{204}$Pb 5.4861 5.5005 5.4962 5.4987 5.5112 5.4916 $^{206}$Pb 5.4946 5.5098 5.5049 5.5078 5.5200 5.5004 $^{208}$Pb 5.5046 5.5185 5.5129 5.5162 5.5279 5.5087 $^{214}$Pb 5.5622 5.5798 5.5711 5.5762 5.5813 5.5699 Δ 0.019 0.019 0.017 0.023 0.022 δ 0.53% 0.51% 0.45% 0.55% 0.60% 26