Angular momentum transfer

The original semiclassical version of the centrifugal sudden approximation (SCS) developed by Strekalov [198, 199] consistently takes into account adiabatic corrections to IOS. Since the orbital angular momentum transfer is supposed to be small, scattering occurs in the collision plane. The body-fixed correspondence principle method (BFCP) [200] was used to write the S-matrix for f — jf Massey parameter a>xc. At low quantum numbers, when 0)zc —> 0, it reduces to the usual non-adiabatic expression, which is valid for any Though more complicated, this method is the necessary extension of the previous one adapted to account for adiabatic corrections at higher excitation... 

The Debye theory [220] in which a sphere of volume V and radius a rotates in a liquid of coefficient of viscosity t has already been mentioned. There is angular momentum transfer across the sphere—liquid interface that is, the liquid sticks to the sphere so that the velocity of the sphere and liquid are identical at the sphere s surface. Solution of the rotational diffusion equation... 

A number of techniques have been used previously for the study of state-selected ion-molecule reactions. In particular, the use of resonance-enhanced multiphoton ionization (REMPI) [21] and threshold photoelectron photoion coincidence (TPEPICO) [22] has allowed the detailed study of effects of vibrational state selection of ions on reaction cross sections. Neither of these methods, however, are intrinsically capable of complete selection of the rotational states of the molecular ions. The TPEPICO technique or related methods do not have sufficient electron energy resolution to achieve this, while REMPI methods are dependent on the selection rules for angular momentum transfer when a well-selected intermediate rotational state is ionized in the most favorable cases only a partial selection of a few ionic rotational states is achieved [23], There can also be problems in REMPI state-selective experiments with vibrational contamination, because the vibrational selectivity is dependent on a combination of energetic restrictions and Franck-Condon factors. 

If the neutron is captured at impact parameter R, the orbital angular momentum transferred to the nucleus, lnft, is given by... 

The polarization of the laser allows specific investigation about the symmetries of the potential surfaces involved in the quenching process and about the angular momentum transferred into molecular rotation. 

To each ionic state Jj and angular momentum transfer jx belongs a reduced scattering amplitude S jt) - the name for which originates from the formulation of photoionization as a half-scattering process. (In a scattering process with real particles the scattered particle still exists after the interaction, but in photoionization the primary incident particle, the photon, is annihilated.) The angular momentum transfer formulation allows a partition of the amplitudes into two classes, parity-favoured and parity-unfavoured, where... 

Jeyes, S.R., McCaffery, A.J. and Rowe, M.D. (1978). Energy and angular momentum transfer in homonuclear diatomic molecules from polarized laser fluorescence, Mol. Phys., 36, 845-867. 

The correlation pattern depends on the angular momentum transfer K between the core hole and the screening charge. For K = 0 there is a correlation between the radial motion, monopole fluctuation, of the core hole and the screening charge (Fig. 13 g) while for K 1 there is an angular correlation. Fig. 13 h describes the case of dynamic dipolar fluctuation (K = 1) where the core hole no longer is spherically distributed and where the... 

The status for inelastic collisions is a little less satisfactory than for elastic collisions. CoIIisional excitation of atoms involves excited states with several magnetic substates. Standard total or differential cross section measurements sum over the magnetic substates, and thus give no information on the shape of the excited state and direction of the angular momentum transferred to the excited atom. These can be determined in... 

Dubrulle B. (1993) Differential rotation as a source of angular momentum transfer in the solar nebula. Icarus 106, 59-76. 

Assuming the disk is perfectly conducting (Zd —> 0), the flux of angular momentum transferred from the black hole to the disk by the magnetic fields... 

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