ar X iv : n uc l - th / 0 10 90 39 v 1 1 5 Se p 20 01 Triaxial deformation in 10 Be
نویسندگان
چکیده
The triaxial deformation in 10 Be is investigated using a microscopic α+α+n+n model. The states of two valence neutrons are classified based on the molecular-orbit (MO) model, and the π-orbit is introduced about the axis connecting the two α-clusters for the description of the rotational bands. There appear two rotational bands comprised mainly of K π = 0 + and K π = 2 + , respectively, at low excitation energy, where the two valence neutrons occupy K π = 3/2 − or K π = 1/2 − orbits. The triaxiality and the K-mixing are discussed in connection to the molecular structure, particularly, to the spin-orbit splitting. The extent of the triaxial deformation is evaluated in terms of the electromagnetic transition matrix elements (Davydov-Filippov model, Q-invariant model), and density distribution in the intrinsic frame. The obtained values turned out to be γ = 15 o ∼ 20 o .
منابع مشابه
ar X iv : n uc l - th / 0 00 90 41 v 1 1 5 Se p 20 00 CRITICAL PHENOMENA IN FINITE SYSTEMS
We discuss the dynamics of finite systems within molecular dynamics models. Signatures of a critical behavior are analyzed and compared to experimental data both in nucleus-nucleus and metallic cluster collisions. We suggest the possibility to explore the instability region via tunneling. In this way we can obtain fragments at very low temperatures and densities. We call these fragments quantum...
متن کاملar X iv : n uc l - th / 0 60 10 68 v 2 3 0 Se p 20 06 Neutrino - nucleus reactions in the energy range 1 - 100 MeV
We review some salient aspects of calculations of the neutrino-nucleus reaction cross sections in the low energy range (1-100 MeV).
متن کاملar X iv : n uc l - th / 0 40 90 25 v 1 1 3 Se p 20 04 Charge symmetry breaking and the dd → απ 0 reaction — recent theoretical developments
The status of the theoretical effort to calculate charge-symmetry-breaking pion production reactions will be presented. The main emphasis will be on the dd → απ0 reaction, especially in relation to the recent IUCF experiment. Suggestions for future theoretical and experimental work will be made.
متن کامل