Energies, Landé g-factors, and lifetimes for some excited levels of doubly ionized lanthanum

Relativistic coupled-cluster calculation of hyperfine-structure constants of La 2+

“…Therefore, knowledge of the atomic properties of La 2+ is of great interest for both experimentalists and theorists. In the past several decades, there have been a wealth of reported works to atomic properties of La 2+ [4][5][6][7][8][9][10][11][12][13][14], including energies, multipole transition matrix elements, oscillator strengths, lifetimes, branching ratios, Landé g factors and polarizabilities. Safronova et al [14] have made a brief review of these properties, and an extensive calculation of various transition properties was also performed using a high-precision relativistic all-order method.…”

Optogalvanic spectroscopy of the hyperfine structure of the 5p65d 2D3/2,Olmschenk1, Banner2, Hankes3 et al. 2017Phys. Rev. A3040View full textAdd to dashboardCite

“…The hyperfine structure of singlyionized lanthanum has been investigated with a range of techniques [11,12], including experimental observations using grating spectroscopy [13], interferometry [14], collinear ion-beam-laser spectroscopy [15][16][17][18], Fourier transform spectroscopy [2,19], a laser and radiofrequency double resonance technique [20], and laser-induced fluorescence [21][22][23], as well as theoretical calculations using a classical parametric scheme [24], a relativistic configuration-interaction method [25], and a semiempirical method [21,22]. Although many of the parameters for doubly-ionized lanthanum (La III; La 2+ ) also have been investigated experimentally [26][27][28][29][30][31][32][33][34][35] and theoretically [6,[36][37][38][39][40][41][42], the hyperfine structure of La 2+ is known for only a few energy levels. Specifically, using grating spectroscopy [31,43] and interferometry [44] the hyperfine structure of the metastable 6s 2 S 1/2 and excited 6p 2 P 1/2,3/2 levels of La 2+ were measured.…”

Optogalvanic spectroscopy of the hyperfine structure of the $5p^65d$ ${}^2D_{3/2,5/2}$ and $5p^64f$ ${}^2F^o_{5/2,7/2}$ levels of La III

“…The hyperfine structure of singlyionized lanthanum has been investigated with a range of techniques [11,12], including experimental observations using grating spectroscopy [13], interferometry [14], collinear ion-beam-laser spectroscopy [15][16][17][18], Fourier transform spectroscopy [2,19], a laser and radiofrequency double resonance technique [20], and laser-induced fluorescence [21][22][23], as well as theoretical calculations using a classical parametric scheme [24], a relativistic configuration-interaction method [25], and a semiempirical method [21,22]. Although many of the parameters for doubly-ionized lanthanum (La III; La 2+ ) also have been investigated experimentally [26][27][28][29][30][31][32][33][34][35] and theoretically [6,[36][37][38][39][40][41][42], the hyperfine structure of La 2+ is known for only a few energy levels. Specifically, using grating spectroscopy [31,43] and interferometry [44] the hyperfine structure of the metastable 6s 2 S 1/2 and excited 6p 2 P 1/2,3/2 levels of La 2+ were measured.…”