W. Andrejtscheff et P. Petkov, ASYMMETRY VERSUS SYMMETRICAL QUADRUPOLE DEFORMATION IN EVEN-EVEN NUCLEI WITH -LESS-THAN-OR-EQUAL-TO-A-LESS-THAN-OR-EQUAL-TO-192, Physical review. C. Nuclear physics, 48(5), 1993, pp. 2531-2533
From experimental E2 matrix elements, the asymmetry shape parameter de
lta(eff) (corresponding to Bohr's model parameter gamma) is derived fo
r the ground states of some fifty even-even nuclei with 94 less-than-o
r-equal-to A less-than-or-equal-to 192 (42 less-than-or-equal-to Z les
s-than-or-equal-to 76) by the sum-rule method. For the nuclei studied,
an overall correlation between asymmetry and quadrupole deformation e
merges.