Photon emission and absorption

The conclusion of all this is the following. If we place our two atoms in a lattice and do the experiment under conditions where recoil energy of the photon emission and absorption are significantly smaller than the energy of the lattice vibrations, a fraction of the photons emitted by the source nucleus will be absorbed by the nucleus in the absorber. This is the Mossbauer effect, named after Rudolf L. Mossbauer, who discovered it in 1957 and received the Nobel Prize in 1961 [9]. 

Figure 21c shows the respective probabilities of one and two ( >i pump photon absorption tPp-1, Pp. 2. and of one (02 Stokes photon emission and absorption /Js i. yjs. 1. defined with the respective formulas of the probabilities of coj photons emissions and of (02 photons emissions... 

Although each of these models work well in its region of validity, there is no model that deals with the many-body character of the interactions valid for all energy ranges of the projectile. Furthermore, for a proper description of the interaction, any model should incorporate dynamical effects such as electron transfer, rotations and vibrations, nuclear displacement, bond breaking and bond making (chemical reactions), photon emission and absorption, electronic excitations, and ionization. 

MECHANISM AND PROPERTIES OF BIO-PHOTON EMISSION AND ABSORPTION OF PROTEIN MOLECULES IN LIVING SYSTEMS... 

Mechanism and Properties of Bio-Photon Emission and Absorption of Protein Molecules 411... 

Spectroscopic photon emission and absorption processes have been inter-... 

The third term in Eq. (8.1) gives the electron-photon interaction. An electron in orbital i) is annihilated, an electron in orbital fc> is created. This electron transition is coupled to the emission or absorption of a photon q. The respective coupling parameters are denoted by V ikiq) and U kiq). They are independent of the position of photon emission and absorption only if the photons correspond to planar modes. 

Each electron creation or atmihilation in state i is coupled to electron creations and atmihilations in other states k via photon emission and absorption. The operators C, Ci create and annihilate quasi-electrons. Similarly, each photon emission or absorption in state q is coupled to an electron transition from state i to state L The operators A, emit and absorb quasi-photons. The brackets in Eqs. (8.26)-(8.29) denote the commutators. We distinguish two different terms of order two in the interaction parameters. The second order processes leading to the same... 

Process of Photon Emission and Absorption 17.4.1 Electron-Phonon Coupling... 

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