公式
参数
σ /fm
R C = r 0 A 1 / 3
r 0 = 1.2274 fm
0.1288
R C = r 0 Z 1 / 3
r 0 = 1.6396 fm
0.0960
R C = r 0 ( 1 − a N − Z A ) A 1 / 3
r 0 = 1.2817 fm , a = 0.2642
0.0869
R C = r 0 ( 1 − a N − Z Z ) Z 1 / 3
r 0 = 1.6612 fm , a = − 0.0458
0.0878
R C = r 0 ( 1 − a N − Z A + b 1 A ) A 1 / 3
r 0 = 1.2338 fm , a = 0.1477 , b = 2.2849
0.0504
R C = r 0 ( 1 − a N − Z Z + b 1 Z ) Z 1 / 3
r 0 = 1.5591 fm , a = − 0.0824 , b = 1.0379
0.0519
R C = r 0 ( 1 − a N − Z A + b 1 A + c P A ) A 1 / 3
r 0 = 1.2279 fm , a = 0.1517 , b = 1.9222 , c = 0.3934
0.0348
R C = r 0 ( 1 − a N − Z A + b 1 A + c P A + d δ A ) A 1 / 3
r 0 = 1.2279 fm , a = 0.1519 , b = 1.8902 , c = 0.3970 , d = 0.1222
0.0344
R C = r 0 ( 1 − a N − Z A + b 1 A + c P A + d β 2 2 A ) A 1 / 3
r 0 = 1.2316 fm , a = 0.1607 , b = 1.6929 , c = 0.3005 , d = 12.4134
0.0321
R C = r 0 ( 1 − a N − Z A + b 1 A + c P A + d β 2 2 A + e β 4 2 A ) A 1 / 3
r 0 = 1.2346 fm , a = 0.1788 , b = 1.6676 , c = 0.2773 , d = 10.8053 , e = 365.718
0.0295