Hyperfine structure of Li andBe+

Abstract

A large-scale relativistic configuration-interaction (CI) calculation is performed for the magneticdipole and the electric-quadrupole hyperfine structure splitting in 7,6 Li and 9 Be + . Numerical results for the 2 2 S, 3 2 S, 2 2 P 1/2 , and 2 2 P 3/2 states are reported. The CI calculation based on the Dirac-Coulomb-Breit Hamiltonian is supplemented with separate treatments of the QED, nuclearmagnetization distribution, recoil, and negative-continuum effects.

Ground-state hyperfine structure of H-, Li-, and B-like ions in the intermediate-Zregion

“…(3). However, addi- tional contributions arising from the specific mass shift and spin-orbit recoil corrections [56] are significantly smaller than the uncertainty assigned for the Bohr-Weisskopf correction.…”

“…(3) with 100% uncertainty, caused by uncalculated specific mass shift and spin-orbit recoil corrections [56]. …”

Precise measurement of hyperfine structure in the2P1/2state ofLi7Singh1, Muanzuala2, Natarajan3 2010Phys. Rev. A9181View full textAdd to dashboardCite

“…[4] is +27.0 kHz, almost an order-of-magnitude larger than the experimental error. More importantly, there are two independent calculations of the hyperfine constant, one reporting a value of 45.966(1) MHz [2] and the other a value of 45.958 MHz [3]. Thus, the uncorrected constant from our measurement differs from both calculations by ∼ 60 kHz (20 σ), while the correction increases the difference still further.…”

“…We have recently reported the most-precise measurements to date of hyperfine intervals (with accuracy of 6 kHz) in the 2P 1/2 state of 6,7 Li [1]. Around the same time, there have been high-accuracy calculations of the hyperfine constants in this state using both the configuration-interaction method [2] and the coupledcluster method [3]. Furthermore, Beloy and Derevianko [4] have pointed out the importance of taking secondorder effects into account when calculating the hyperfine constants from the measured intervals.…”

Relativistic configuration-interaction calculation ofKαtransition energies in berylliumlike iron

“…Our implementation of the CI method has been described in the previous papers [2,11,12]. We shall therefore discuss here only those issues that are new to the present calculation.…”