PACS. 72.20M -Galvanomagnetic and other magnetotransport effects.PACS. 73.20D -Electron states in lowdimensional structures (inc. quantum wells, superlattices, layer structures and intercalation compounds).
PACS. 73.60 -Electronic properties of thin films.Abstract. -A strong magnetic field pointing in the z-direction is applied to a narrow sample, whose thickness (in this direction) is a function of 2. It is shown that the induced potential, caused by the thickness function, plays a similar role to that of a <
We study the differential-geometric structure of the space of thermodynamic states in equilibrium thermodynamics. We demonstrate that this space is a foliation of codimension two and find variables in which the foliation fibers are flat. We show that we can introduce a symplectic structure on this space: the external derivative of the 1-form of the heat source, which has the form of the skew-symmetric product dT ∧ dS in the found variables. The entropy S then plays the role of the Lagrange function (or Hamiltonian) in mechanics, completely determining the thermodynamic system.
The differential cross sections of the 12 C( 3 He,t) 12 N reaction leading to formation of the 1 + (ground state), 2 + (0.96 MeV), 2 − (1.19 MeV), and 1 − (1.80 MeV) states of 12 N are measured at E( 3 He)=40 MeV. The analysis of the data is carried out within the modified diffraction model (MDM) and distorted wave Born approximation (DWBA). Enhanced rms radii were obtained for the ground, 2 − (1.19 MeV), and 1 − (1.80 MeV) states. We revealed that 12 B, 12 N, and 12 C in the IAS with T=1, and spin-parities 2 − and 1 − have increased radii and exhibit properties of neutron and proton halo states.
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