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Zener

Zhu I, Wdom A and Champion P M 1997 A multidimensional Landau-Zener description of chemical reaction dynamics and vibrational coherence J. Chem. Phys. 107 2859-71... [Pg.1227]

Figure Bl.27.8. Schematic view of Picker s flow microcalorimeter. A, reference liquid B, liquid under study P, constant flow circulating pump and 2, Zener diodes acting as heaters T and T2, thennistors acting as temperature sensing devices F, feedback control N, null detector R, recorder Q, themiostat. In the above A is the reference liquid and C2is the reference cell. When B circulates in cell C this cell is the working cell. (Reproduced by pemiission from Picker P, Leduc P-A, Philip P R and Desnoyers J E 1971 J. Chem. Thermo. B41.)... Figure Bl.27.8. Schematic view of Picker s flow microcalorimeter. A, reference liquid B, liquid under study P, constant flow circulating pump and 2, Zener diodes acting as heaters T and T2, thennistors acting as temperature sensing devices F, feedback control N, null detector R, recorder Q, themiostat. In the above A is the reference liquid and C2is the reference cell. When B circulates in cell C this cell is the working cell. (Reproduced by pemiission from Picker P, Leduc P-A, Philip P R and Desnoyers J E 1971 J. Chem. Thermo. B41.)...
The Landau-Zener transition probability is derived from an approximation to the frill two-state impact-parameter treatment of the collision. The single passage probability for a transition between the diabatic surfaces H, (/ ) and R AR) which cross at is the Landau-Zener transition probability... [Pg.2052]

The problem of branching of the wavepacket at crossing points is very old and has been treated separately by Landau and by Zener [H, 173. 174], The model problem they considered has the following diabatic coupling matrix ... [Pg.2319]

Zener C 1932 Nonadiabatic crossing of energy levels Proc. R. Soc. A 137 696... [Pg.2330]

The motivation comes from the early work of Landau [208], Zener [209], and Stueckelberg [210]. The Landau-Zener model is for a classical particle moving on two coupled ID PES. If the diabatic states cross so that the energy gap is linear with time, and the velocity of the particle is constant through the non-adiabatic region, then the probability of changing adiabatic states is... [Pg.292]

This dependency is seen in the Landau-Zener expression for the probability of a classical particle changing states while moving through a non-adiabatic... [Pg.310]

In the study of (electronic) curve crossing problems, one distinguishes between a situation where two electronic curves, Ej R), j — 1,2, approach each other at a point R = Rq so that the difference AE[R = Rq) = E iR = Rq) — Fi is relatively small and a situation where the two electronic curves interact so that AE R) Const is relatively large. The first case is usually treated by the Landau-Zener fonnula [87-92] and the second is based on the Demkov approach [93]. It is well known that whereas the Landau-Zener type interactions are... [Pg.662]

All Np states belonging to the Pth sub-space interact strongly with each other in the sense that each pair of consecutive states have at least one point where they form a Landau-Zener type interaction. In other words, all j = I,... At/> — I form at least at one point in configuration space, a conical (parabolical) intersection. [Pg.664]

At this point, we make two comments (a) Conditions (1) and (2) lead to a well-defined sub-Hilbert space that for any further treatments (in spectroscopy or scattering processes) has to be treated as a whole (and not on a state by state level), (b) Since all states in a given sub-Hilbert space are adiabatic states, stiong interactions of the Landau-Zener type can occur between two consecutive states only. However, Demkov-type interactions may exist between any two states. [Pg.664]

Before we continue and in order to avoid confusion, two matters have to be clarified (1) We distinguished between two types of Landau-Zener situations, which form (in two dimensions) the Jahn-Teller conical intersection and the Renner-Teller parabolical intersection. The main difference between the two is... [Pg.665]

For the connection of this result to the well-known Landau-Zener formula [23] see [15]. [Pg.390]

Tully, J. C. Nonadiabatic Processes in Molecular Collisions. In Dynamics of Molecular Collisions, Part B (W.H. Miller, ed.). Plenum, New York (1976) Zener, C. Non-adiabatic crossing of energy levels, Proc. R. Soc. London, Ser. A 137 (1932) 696-702... [Pg.395]

C. Zener, Elasticity andAnelasticity of Metals, University of Chicago Press, Chicago, lU., 1948. [Pg.205]

The transition described by (2.62) is classical and it is characterized by an activation energy equal to the potential at the crossing point. The prefactor is the attempt frequency co/27c times the Landau-Zener transmission coefficient B for nonadiabatic transition [Landau and Lifshitz 1981]... [Pg.29]

The problem of nonadiabatic tunneling in the Landau-Zener approximation has been solved by Ovchinnikova [1965]. For further refinements of the theory beyond this approximation see Laing et al. [1977], Holstein [1978], Coveney et al. [1985], Nakamura [1987]. The nonadiabatic transition probability for a more general case of dissipative tunneling is derived in appendix B. We quote here only the result for the dissipationless case obtained in the Landau-Zener limit. When < F (Xe), the total transition probability is the product of the adiabatic tunneling rate, calculated in the previous sections, and the Landau-Zener-Stueckelberg-like factor... [Pg.55]

Figure 3-46 The Zener diode controller supply regulator. Figure 3-46 The Zener diode controller supply regulator.

See other pages where Zener is mentioned: [Pg.2052]    [Pg.2053]    [Pg.2319]    [Pg.180]    [Pg.216]    [Pg.216]    [Pg.293]    [Pg.310]    [Pg.325]    [Pg.663]    [Pg.736]    [Pg.759]    [Pg.395]    [Pg.350]    [Pg.786]    [Pg.29]    [Pg.55]    [Pg.93]    [Pg.93]    [Pg.93]    [Pg.125]    [Pg.127]    [Pg.138]    [Pg.145]    [Pg.11]    [Pg.15]    [Pg.15]    [Pg.15]    [Pg.15]    [Pg.19]    [Pg.20]    [Pg.81]    [Pg.81]   
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Adiabatic theory Landau-Zener transition

Avalanche Zener

Avoided crossings and Landau-Zener transitions

Diode zener

Dissipation zener clamp

Double exchange Zener model

Equation Landau-Zener

Interactions Zener double exchange

Interactions Zener electron

Landau Zener approximation

Landau-Zener

Landau-Zener Semiclassical Approximation

Landau-Zener approximation tunneling

Landau-Zener classical transition

Landau-Zener classical transition probability

Landau-Zener crossing

Landau-Zener crossing formalism

Landau-Zener crossing formalism Borgis-Hynes model

Landau-Zener crossing formalism proton-transfer reactions

Landau-Zener curve crossings

Landau-Zener factor

Landau-Zener factor reactions

Landau-Zener factor tunneling

Landau-Zener formula

Landau-Zener formula nonadiabatic transition

Landau-Zener formula transition

Landau-Zener maxima

Landau-Zener model

Landau-Zener oscillations

Landau-Zener parameter

Landau-Zener probability

Landau-Zener quantum tunnelling

Landau-Zener relation

Landau-Zener surface, hopping rates

Landau-Zener theory

Landau-Zener theory dynamics

Landau-Zener transition

Landau-Zener transmission coefficient

Landau-Zener treatment

Landau-Zener-Stueckelberg

Landau-Zener-Stueckelberg theory

Landau-Zener-Stueckelberg theory nonadiabatic transition

Mean-field Zener model

Nonadiabatic transition Rosen-Zener-Demkov-type

Probability, Landau—Zener transition

The Landau-Zener theory of curve crossing model

The Mighty Zener

The Zener model

Tunneling Landau-Zener

Viscoelastic models Zener

Zener Formulation

Zener Semiclassical Approximation

Zener approach

Zener barrier

Zener breakdown

Zener breakdown voltage

Zener cards

Zener clamp

Zener clipping circuit

Zener double exchange

Zener double exchange process

Zener effect

Zener electron

Zener element

Zener limit

Zener mechanism

Zener model

Zener pairs

Zener polaron

Zener polarons

Zener ratio

Zener region

Zener relationship

Zener safety barrier

Zener solid

Zener theory

Zener treatments

Zener tunnelling

Zener, Clarence

Zener, Mean-Field, and Ab Initio Treatments

Zeners, avalanche

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