Quadratic Zeeman effect in boronlike argon

Nuclear magnetic shielding in boronlike ions

“…First, in contrast to 1s and 2s states, where σ grows fast with Z, for 2p 1/2 state σ shows roughly 1/Z-behaviour. A similar feature is observed for the nonlinear Zeeman effect in B-like ions [33,[39][40][41][42], it is explained by the contribution of the 2p 3/2 state with rather small energy difference in Eq. (5).…”

Helium-like ions in magnetic field: application of the nonperturbative relativistic method for axially symmetric systems

“…Typically, such problems are solved using perturbation theory. See, e.g., the PT calculations of the second-order Zeeman effect in hydrogen-like ions [42][43][44][45][46][47], the second-and third-order Zeeman effects in boron-like ions [23][24][25][26][27], and the Zeeman splitting in hydrogen-, lithium-, and boron-like ions with nonzero nuclear spin [16][17][18][19][20][21][22]. Here we demonstrate application of the non-perturbative A-DKB method and compare the results with the PT calculations.…”

“…can be evaluated by the well-known perturbation theory formulae. We perform these calculations here for the 1s state using the previously developed numerical approach [26,27].…”

“…Recent measurement of the ground-state g factor in 40 Ar 13+ [4] was sensitive to the third-order contribution [24][25][26]. Subtraction of the second-order contribution [24,[26][27][28] was required to obtain the most precise up-to-date experimental value of the fine-structure transition energy in B-like argon [29]. The nonlinear Zeeman effects are enhanced by the closely spaced levels of the same parity -2 P 1/2 and take place for n = 2 levels in low-and middle-Z He-like ions.…”

Ядерное Магнитное Экранирование В Многозарядных Ионах

“…Также представлены результаты для σ 0 из [21]. Значения σ даны в единицах 10 −3 [33,[39][40][41][42], она объясняется вкладом состояния 2p 3/2 с очень малой разностью энергий в формуле (5). Во-вторых, поправка на однофотонный обмен имеет тот же знак, что и σ 0 , и растет еще быстрее в направлении малых Z. Таким образом, для лёгких Bподобных ионов эффект ядерного магнитного экранирования заметно усиливается, а вклад межэлектронного взаимодействия значителен, и его следует учитывать во всех порядках теории возмущений.…”