Difference of a20 between protons and neutrons

Last modification: 1996/3/21
A figure ( GIF file of 4.1KB or PS file of 37KB ) presents a comparison of the values of a20 between protons and neutrons for the ground states of 1029 even-even nuclei (denoted by plus symbols) and the first-excited solution of 758 even-even nuclei for HF+BCS with SIII force. The r.m.s. difference is 0.012, while the largest differences occur in the ground state of the nuclei indicated by letters from A to F. We tabulate these nuclei below: 
Symbol  Nucleus    a20neu    a20pro
A       14Be       0.36     0.52
B       16Be       0.44     0.59
C       30Ar       0.28     0.18
D       30Mg       0.18     0.27
E       36Cr       0.36     0.28
F       28Ar       0.18     0.11
Among these nuclei, 30Ar, 36Cr, and 28Ar are outside the proton drip line. The absolute value of the difference is smaller than 0.05 for 98.9% of the solutions.