Spin-exchange relaxation of naturally abundant Rb in a K–Rb–²¹Ne self-compensated atomic comagnetometer*

Abstract

The total effective spin-exchange relaxation of naturally abundant Rb in a K–Rb–21Ne comagnetometer is analyzed, and the results show that the coexistence of 87Rb and 85Rb isotopes in the same volume can lead to a large extra spin-exchange broadening compared to pure 87Rb. This broadening mainly comes from the contribution of the equivalent reduction in the Rb spin-exchange rate. On this basis, an approximate relaxation model is proposed and experimentally demonstrated to be more accurate than that from a previous work. This study also provides a method for determining the properties of alkali-metal vapor cells.

Magnetic resonance frequency shifts of alkali atoms in a K-Li mixture

“…In [12] a theory was developed of magnetic resonant frequency shifts of alkali atoms in the conditions when one sort of alkali atoms in a mixture is optically oriented by the resonant polarized optical radiation. That is, the situation is similar to that implemented in [4,5]. In the model under consideration, in a system of two alkali atoms A and B optical orienting of atoms B is implemented and shifts of magnetic resonant frequency of atoms A are determined for two hyperfine states.…”

“…Quantum magnetometers with optical pumping currently play an important role in various magnetic measurements [1,2]. Working media of this kind of magnetometers can be atoms of alkali metals in the ground state [3], mixtures of alkali atoms of different sorts [4,5], mixtures of alkali atoms and excited atoms of Helium in the metastable 2 3 S 1 -state [6], excited atoms of Helium in the metastable 2 3 S 1 -state [7].…”

Сдвиги частоты магнитного резонанса атомов Na при столкновении в смеси атомов калия и натрия

“…В частности, при проведении разного рода магнитных измерений используются квантовые магнитометры с оптической накачкой [1,2], оптическая ориентация атомов используется при создании квантовых гироскопов [3], а также магнитоэнцефалографов [4]. В качестве рабочих сред такого рода устройств выступают, в частности, атомы щелочных металлов в основном состоянии [5], причем как атомы одного сорта, так и смеси разных щелочных атомов [6,7]. Присутствующие в камере поглощения щелочные атомы сталкиваются друг с другом, при этом столкновения щелочных атомов сопровождаются хорошо известным процессом спинового обмена, т. е. процессом обмена электронной поляризацией между сталкивающимися атомами.…”