Results 301 to 310 of about 178,933 (313)
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1980
As we remember (Chapter 2.1), the non-radiative transitions occurring at the same electronic state are called adiabatic transitions. It means that in terms of the Born-Oppenheimer approximation (see Chapter 1.4) the transitions are going on at the same electronic energy hypersurface between two potential energy minima corresponding to two (quasi ...
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As we remember (Chapter 2.1), the non-radiative transitions occurring at the same electronic state are called adiabatic transitions. It means that in terms of the Born-Oppenheimer approximation (see Chapter 1.4) the transitions are going on at the same electronic energy hypersurface between two potential energy minima corresponding to two (quasi ...
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Adiabatic processes in monatomic gases
The Journal of Chemical Physics, 1988A kinetic model is used to predict the temperature evolution of a monatomic ideal gas undergoing an adiabatic expansion or compression at a constant finite rate, and it is then generalized to treat real gases. The effects of interatomic forces are considered, using as examples the gas with the square-well potential and the van der Waals gas.
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Adiabatic Approximation for Scattering Processes
Physical Review, 1956The adiabatic approximation, frequently utilized in treating bound states of quantum-mechanical systems, is shown to be applicable also to scattering processes in cases for which the number of excited states of the target contributing significantly to the wave function is limited, and for which the time of traversal of the scattered particle through ...
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Adiabatic calorimetry for safety studies in nitration processes
Thermochimica Acta, 1992Abstract The thermal and chemical evolution of the benzonitrile nitration process under adiabatic conditions were investigated for the reacting mixture: 5.1% benzonitrile 30.9% HNO 3 55.4% H 2 SO 4 and 8.6% H 2 O at a starting temperature of 300 K.
ANDREOZZI, ROBERTO +3 more
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Electronically Non-adiabatic Processes
2003So far we have almost entirely dealt with surface structures and processes that correspond to the electronic ground state. This means that we have assumed that the Born-Oppenheimer approximation is justified. Although there are many important processes at surfaces that involve electronic transitions [225,383,384], the status of the theoretical ...
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Adiabatic Processes. Laplace’s Theorem
1977A process is adiabatic if Q(t) = 0 at all times t at which Q(t) is defined. Any curve in 풟 whose tangent vector in some parametric representation is always orthogonal to the vector field (Λ V , K V ) is called an adiabat.
Subramanyam Bharatha +1 more
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Adiabatic Processes in Magnetic Materials
2000The paper discusses the heat generation and absorption in magnetic materials during adiabatic processes (magneto- and elastocaloric effects). The general thermodynamic relations for the elastocaloric effect are derived, and numerical values for the rare earths Gd and Ho are calculated.
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Adiabatic Processes in the Stellar Interior
2016In this chapter we present a brief review of some reversible thermodynamic processes, in particular the adiabatic expansion or contraction as applied to the internal stellar layers.
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