Spin-exchange relaxation of naturally abundant Rb in a K–Rb–<sup>21</sup>Ne self-compensated atomic comagnetometer

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

Lu Yan¹, Zhai Yueyang^{2, 3, 4}, Zhang Yong¹, Fan Wenfeng¹, Xing Li¹, Quan Wei^{2, 3, 4, †}

Simulations for comparison of the various parameters associated with the SE relaxation between the ⁸⁷Rb and ⁸⁵Rb isotopes contained in naturally abundant Rb in the same vapor cell. (a) Dimensionless gyromagnetic ratios γ(P^e); (b) slowing-down factors Q(P^e); (c) precession rates ω₀; (d) simulated SE relaxation rates Rseee in a naturally abundant Rb vapor cell obtained using the densities n_a = 27.8% × n^e and n_b = 72.2% × n^e for ⁸⁷Rb and ⁸⁵Rb, respectively, where n^e = 3.831 × 10¹⁴ cm⁻³ is the total Rb vapor density measured during the cell preparation process.