ISSN:
1434-601X
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract The experimental information onB(E2) transition rates in the yrast bands of doubly even nuclei (126≦A≦184) is systematized. The strength functionS exp≡B(E2,I→I−2)×E(I→I−2) is found to reveal characteristic behavior significant for structure studies of yrast bands. The energy-weightedB(E2,I→I−2) values (S exp) and 2ℐ/ℏ2(ℐ: moment of inertia) are plotted versus the rotational frequency squared ℏ2ω2 for each nucleus. In strongly deformed nuclei (N≧90), theS exp curves smoothly increase for low rotational frequencies suggesting that up to spin valuesI≈8 the ratioQ 0 2 ℐ is nearly constant (Q 0: quadrupole moment). This is not the case in nuclei with a soft core (N≦88). In the relevant discussion, the hydrodynamical model as well as the CAP effect are considered. The results in the backbending region are qualitatively discussed in terms of the two-band crossing model. Evidence is found supporting the prediction of an oscillating behavior of the yrast-yrare interaction.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01412653
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