Exchange, spin

During the collision of atoms which have unfilled electron shells, a spin exchange is possible [30]. The spin exchange substantially perturbs the hyperfine states of the colliding atoms and thus plays an important role in 

We shall confine ourselves to considering the spin exchange during the collision of atoms which have one s-electron in the outer shell (atoms of H or those of alkaline metals). The wave function describing the atoms with oppositely directed spins, before the collision, has the form 

As an example of the good agreement between the theoretical calculations and experimental measurements of spin exchange cross-sections, one can cite the data [19] for the atoms of alkaline metals (the units of cross-section measurements are 10 16cm2) 

---

Related compounds with other transition metals have been studied only sparsely, e.g., with nickel(II) [198], cobalt(III) [174], and rhodium(lll) [199, 200]. A series of dimeric copper(ll) complexes [[Cu(L BF2)S][X] is also known and exhibits interesting magnetic effects associated with electron spin exchange between the copper(ll) ions [201]. 

Polarization inversion spin exchange at the magic angle... 

Turner and Schultz (2001) Coupled electron-transfer and spin-exchange reactions [248]. 

Synergism of Spin Crossover and Spin-Spin Exchange Coupling. 199... 

McCONNELL S HEITLER-LONIXJN SPIN-EXCHANGE MODEL BETWEEN SPIN DENSITIES OF OPPOSITE SIGN ON RADICALS A AND B... 

In the low-density limit, the parallel-spin and anti-parallel-spin exchange-correlation energies are equal [57] because this is a classical limit in which spin... 

Therefore, ferromagnetic coupling is needed not only in the triplet orientation of the spins, but also in the spin-exchanging ability in the framework of a planar dication-diradical. 

Van Vleck showed that the nuclear spin exchange between like spins leads to narrowing of the resonance line, while nuclear spin exchange between unlike spins gives rise to broadening of the resonance line. 

Nuclear spin exchange has also been observed (80) between nuclei in semiconductors of the heavier elements, such as InSb, GaSb, GaAs, and InAs, and considerable exchange broadening of these NMR lines has been observed. Anderson (81) has given a treatment of the exchange effect in semiconductors. 

---