TWO TYPES DATA FOR NUCLEUS QUADRUPOLE DEFORMATION PARAMETER AND DINAMIC VIBRATIONS OF ITS SURFACE

Authors & Affiliations

Boboshin I.N.1, Varlamov V.V.1, Ishhanov B.S.1,2, Komarov S.Yu.3, Labutin V.N.3, Orlin V.N.1
1D. V. Skobeltsyn Institute of Nuclear Physics (SINP) of the Moscow State University, Russia
2Faculty of Physics, M.V. Lomonosov Moscow State University, Russia
3Indesit Company International B.V.

Abstract

Using the new Chart (relational database) of nuclear quadrupole deformation parameters β2 the systematical comparative analysis of those from various sources was carried out for many even-even nuclei. The clear systematical disagreements of β2 values obtained from nuclear quadrupole moments Q data and from reduced transition probability B(E2)↑ data were revealed. It was found out that all nuclides (with only few exceptions) can be clearly separated into 2 groups: in one good agreement is observed for data of both types, but in another deformation parameters β2 obtained from B(E2)↑ are systematically (and in many cases – significantly) larger than those obtained from Q. It was shown that two types data difference could be explained in the frame of assumption about the not-negligible role of dynamical vibrations of nucleus surface, by other words - assumption about deformation parameter β2 value dependence on surface vibration of nucleus in ground state. From this point of view β2 values obtained from B(E2)↑ reflect not only static nuclear deformation (nucleus shape), but dynamic deformation also. Comparison of the раrameter obtained with that obtained by another independent method could give to one possibility for real discussion of such nucleus properties as toughness (rigidity) or, vise versa, laxity (friability).

Keywords
deformation of the atomic nuclei, quadrupole deformation of the nucleus, nuclide, nuclear surface, option stiffness, mass parameter

Article Text (in Russian, PDF)

References

UDC 539.171

Problems of Atomic Science and Technology. Series: Nuclear Constants", issue 1-2, 2007