The Quarks as Dirac States
As fermions, the quarks and leptons of the first family could be described as pairs of solutions of the Dirac equation (Dirac states). The color and electric charges are associated with the symmetry operations bringing the Dirac states into pairs. The obtained quark model is similar to that given by Han – Nambu, where the electric charges of the d and u quarks assume integer values. The quark s may have an inner structure formed from quarks of the first family, s = uud and s = uud.
A semi-classical picture of the electron spin
Abstract By postulating that the spin angular frequency of the electron is related to its rest energy by ωo = moc2/ℏ, we arrive at a value for radius of the electron, equal to its Compton wavelength λc = ℏ/moc. An assumed spherically symmetrical mass and charge density distribution of the form ϱm ∝ ϱe ∝ r3 then results in a spin angular momentum of S = 1 2 ℏ and a magnetogyric ratio of μ/S ⋍ 1.055 e/mo.
5.63 and 5.80 MeV levels of Ne20; de-excitation branching
Abstract The ratio Г γ /Г for the 5.63 and 5.80 MeV levels of Ne 20 has been determined to be 0.077 (±0.008) and −4 , respectively, by using the C 12 (C 12 , α)Ne 20 reaction and determining the fraction of the events in which the alpha-particle and the Ne 20 recoil are present in coincidence at the kinematically correct angles. In both cases these results in themselves are shown to imply radiative E1 transition (5.63→1.63 and 5.80→0, respectively) probabilities ⪡5 × 10 −5 Weisskopf units. When taken together with the life-time for the 5.63 MeV level measured by Evans et al . values of Г( E1 ) ≲ 5 × 10 −6 and Г α ≈ 6% of the particle estimate are obtained for this state.