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Particles, charged, interaction with molecules

Table 2 Fundamental Processes in the Physical, Physicochemical, and Chemical Stages of the Interactions of High-Energy Charged Particles and Photons with Molecules AB... Table 2 Fundamental Processes in the Physical, Physicochemical, and Chemical Stages of the Interactions of High-Energy Charged Particles and Photons with Molecules AB...
In this chapter we introduce some of the fundamental concepts needed to understand how light interacts with matter. We start by examining a system of classical charged particles that interacts with a pulse of electromagnetic radiation. We then quantize the particle variables and develop the semiclassical theory of light interacting with quantized particles. The details of the derivations are not required for subsequent chapters. However, the resultant equations [Eqs. (1.50) to (1.52)] form the basis for the theoretical development presented in Chapter 2, which deals with both the interaction of weak lasers with molecules and with photodissociation processes. [Pg.1]

The long-range interactions between a pair of molecules are detemiined by electric multipole moments and polarizabilities of the individual molecules. MuJtipoJe moments are measures that describe the non-sphericity of the charge distribution of a molecule. The zeroth-order moment is the total charge of the molecule Q = Yfi- where q- is the charge of particle and the sum is over all electrons and nuclei in tlie molecule. The first-order moment is the dipole moment vector with Cartesian components given by... [Pg.187]

As a rule, energy is transferred from a fast charged particle by electrostatic interaction with the electrons of the molecule. Exceptions are found at very low or very high speeds (vide infra). At ultrarelativistic speeds, the electromagnetic interaction compares significantly with the electrostatic interaction. [Pg.6]

The absolute values of the photoabsorption, photoionization, and photodissociation cross sections are key quantities in investigating not only the interaction of photons with molecules but also the interaction of any high-energy charged particle with matter. The methods to measure these, the real-photon and virtual-photon methods, are described and compared with each other. An overview is presented of photoabsorption cross sections and photoionization quantum yields for normal alkanes, C H2 + 2 n = 1 ), as a function of the incident photon energy in the vacuum ultraviolet range and of the number of carbon atoms in the alkane molecule. Some future problems are also given. [Pg.105]


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Charged molecules

Charged particles

Charged particles interaction

Molecule interaction

Molecules charges

Particle charge

Particle charging

Particle interaction

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