Preferred Label : Landau–Zener model;
IUPAC definition : Within the Born–Oppenheimer approximation, a semi-classical model for the probability,
P, of hopping from one electronic state to another of the same or different i multiplicity
/i \[P \exp (- \frac{4\ \pi {2}\ \varepsilon_{12} {2}}{h\ \nu\ s_{1}-s_{2} })\]
where ɛ12 is the potential energy gap between the two electronic states at a surface
crossing point, s1- s2 is the difference in slopes between the intersecting potential
energy curves at this point and ν is the nuclear relative velocity with which the
system passes the point of closest approach.;
Scope note : the original formalism only considered states of the same spin multiplicity.;
Origin ID : LT07409;
See also
Within the Born–Oppenheimer approximation, a semi-classical model for the probability,
P, of hopping from one electronic state to another of the same or different i multiplicity
/i \[P \exp (- \frac{4\ \pi {2}\ \varepsilon_{12} {2}}{h\ \nu\ s_{1}-s_{2} })\]
where ɛ12 is the potential energy gap between the two electronic states at a surface
crossing point, s1- s2 is the difference in slopes between the intersecting potential
energy curves at this point and ν is the nuclear relative velocity with which the
system passes the point of closest approach.
