Singlet (X 1Σ+) and triplet (a 3Σ+) potentials of interaction of two potassium atoms residing in the ground state (4s 2 S 1/2) are presented. Based on the given interaction potentials, the complex cross sections of spin exchange $q = \bar q + i\overline{\overline q}$ for the system under investigation are calculated. Obtained dependences of the real and imaginary parts of the spin-exchange cross section on temperature allow one to obtain information both on the broadening of a magnetic resonance line of K atoms and on the frequency shift of the magnetic resonance during collision.Singlet (X 1Σ+) and triplet (a 3Σ+) potentials of interaction of two potassium atoms residing in the ground state (4s 2 S 1/2) are presented. Based on the given interaction potentials, the complex cross sections of spin exchange $$q = \bar q + i\overline{\overline q}$$ for the system under investigation are calculated. Obtained dependences of the real and imaginary parts of the spin-exchange cross section on temperature allow one to obtain information both on the broadening of a magnetic resonance line of K atoms and on the frequency shift of the magnetic resonance during collision.

Optics and SpectroscopyDec 1, 20119 citations

Spin-Exchange Collisions in the K–Li System

Victor A. Kartoshkin

Abstract Spin-exchange cross sections and the magnetic-resonance frequency shift in collision of lithium and potassium atoms in the ground state have been calculated for the first time. The cross sections are calculated based on the data on the singlet ( $X{}^{1}{{\Sigma }^{ + }}$ ) and triplet ( $a{}^{3}{{\Sigma }^{ + }}$ ) interaction potentials of 39K7Li dimer. A passage from the energy dependences to the temperature ones of the real and imaginary parts of the complex spin-exchange cross section yields information about both the broadening of the magnetic resonance line of the atoms under study and the magnetic-resonance frequency shift in their collision.Abstract Spin-exchange cross sections and the magnetic-resonance frequency shift in collision of lithium and potassium atoms in the ground state have been calculated for the first time. The cross sections are calculated based on the data on the singlet ($$X{}^{1}{{\Sigma }^{ + }}$$) and triplet ($$a{}^{3}{{\Sigma }^{ + }}$$) interaction potentials of 39K7Li dimer. A passage from the energy dependences to the temperature ones of the real and imaginary parts of the complex spin-exchange cross section yields information about both the broadening of the magnetic resonance line of the atoms under study and the magnetic-resonance frequency shift in their collision.

Optics and SpectroscopyOct 1, 20194 citations

q = \bar q + i\overline{\overline q}

for the system under investigation are calculated. Obtained dependences of the real and imaginary parts of the spin-exchange cross section on temperature allow one to obtain information both on the broadening of a magnetic resonance line of K atoms and on the frequency shift of the magnetic resonance during collision.

X{}^{1}{{\Sigma }^{ + }}

) and triplet (

a{}^{3}{{\Sigma }^{ + }}

) interaction potentials of 39K7Li dimer. A passage from the energy dependences to the temperature ones of the real and imaginary parts of the complex spin-exchange cross section yields information about both the broadening of the magnetic resonance line of the atoms under study and the magnetic-resonance frequency shift in their collision.