Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Журнал технической физики

Исследование схемы селективной фотоионизации -=SUP=-177-=/SUP=-Lu

А.Б. Дьячков, Aleksei A. Gorkunov, Anton V. Labozin, Sergei M. Mironov, Gleb O. Tsvetkov, В.Я. Панченко, Valerii A Firsov

Published Jan 1, 2019• 1 citation
Publisher

Abstract

AbstractThe hyperfine structure of transitions in the three-step scheme 5 d 6 s ^22 D _3/2–5 d 6 s 6 p ^4 F $$_{{5/2}}^{^\circ }$$ –5 d 6 s 7 s ^4 D _3/2– (53 375 cm^–1) $$_{{1/2}}^{^\circ }$$ of lutetium ionization is studied for ^175Lu, ^176Lu, and ^177Lu isotopes using the photoionization laser spectroscopy method. Values of the magnetic dipole ( A ) and electric quadrupole ( B ) interaction constants are determined, as well as the energies, the isotope shifts, and the radiative lifetimes for the 5 d 6 s 7 s ^4 D _3/2 and (53 375 cm^–1) $$_{{1/2}}^{^\circ }$$ levels.

DOI
10.21883/os.2019.02.47189.212-18

Related papers

Study of a Selective Photoionization Scheme of 177Lu

Aleksei B D'yachkov, Aleksei A. Gorkunov, Anton V. Labozin +4 more

The hyperfine structure of transitions in the three-step scheme 5d6s22D3/2–5d6s6p4F $$_{{5/2}}^{^\circ }$$ –5d6s7s4D3/2– (53 375 cm–1) $$_{{1/2}}^{^\circ }$$ of lutetium ionization is studied for 175Lu, 176Lu, and 177Lu isotopes using the photoionization laser spectroscopy method. Values of the magnetic dipole (A) and electric quadrupole (B) interaction constants are determined, as well as the energies, the isotope shifts, and the radiative lifetimes for the 5d6s7s4D3/2 and (53 375 cm–1) $$_{{1/2}}^{^\circ }$$ levels.

Optics and Spectroscopy•Dec 1, 2018•21 citations

Isotope selective three-step photoionization of 176Lu

Manda V. Suryanarayana

Numerical computations of ionization efficiency and isotope selectivity of 176 L u have been carried out for the following three-step ladder type photoionization scheme, 5 d 6 s 2 2 D 3 / 2 ( 0.0 c m − 1 ) − − − ⟶ 540.4068 n m ⁡ 5 d 6 s 6 p 4 F 5 / 2 o ( 18504.58 c m − 1 ) − − − ⟶ 535.0626 n m 5 d 6 s 7 s 4 D 3 / 2 ( 37193.98 c m − 1 ) − − − ⟶ 618.0061 n m 53375 c m − 1 A u t o i o n i z a t i o n S t a t e → L u + , by invoking the density matrix formalism for the laser–atom interactions. Equations of motion have been derived for the odd isotopes by inclusion of hyperfine levels. The line shapes and their effect on the ionization efficiency and isotope selectivity have been discussed in detail. The effects of power of excitation and ionization lasers, spectral bandwidths, pulse delays, Doppler broadening of the atomic ensemble on the ionization efficiency, and degree of enrichment have been presented. Optimum conditions for the power of excitation, detunings, and other system parameters for the selective yet efficient photoionization of 176 L u have been identified.

Journal of the Optical Society of America B•Nov 18, 2020•24 citations

Hyperfine structure of laser-cooling transitions in fermionic erbium-167

Albert Frisch, K. Aikawa, Michael F. Mark +3 more

We have measured and analyzed the hyperfine structure of two lines, one at 583 nm and one at 401 nm, of the only stable fermionic isotope of atomic erbium as well as determined its isotope shift relative to the four most-abundant bosonic isotopes. Our work focuses on the $J\ensuremath{\rightarrow}J+1$ laser cooling transitions from the $[\text{Xe}]4{f}^{12}6{s}^{2}{(}^{3}{H}_{6})$ ground state to two levels of the excited $[\text{Xe}]4{f}^{12}6s6p$ configuration, which are of major interest for experiments on quantum degenerate dipolar Fermi gases. From a fit to the observed spectra of the strong optical transition at 401 nm we find that the magnetic dipole and electric quadrupole hyperfine constants for the excited state are ${A}_{e}/h=\ensuremath{-}100.1(3)\phantom{\rule{0.28em}{0ex}}\mathrm{MHz}$ and ${B}_{e}/h=\ensuremath{-}3079(30)\phantom{\rule{0.28em}{0ex}}\mathrm{MHz}$, respectively. The hyperfine spectrum of the narrow transition at 583 nm, was previously observed and accurate ${A}_{e}$ and ${B}_{e}$ coefficients are available. A simulated spectrum based on these coefficients agrees well with our measurements. We have also determined the hyperfine constants using relativistic configuration-interaction ab initio calculations. The agreement between the ab initio and fitted data for the ground state is better than 0.1%, while for the two excited states the agreement is 1% and 11% for the ${A}_{e}$ and ${B}_{e}$ constants, respectively.

arXiv:1304.3326•Physical Review A•Sep 13, 2013•36 citations

Влияние поляризации лазерного излучения на эффективность фотоионизации лютеция

А.Б. Дьячков, Aleksei A. Gorkunov, Anton V. Labozin +4 more

The effect of laser radiation polarization on the photoionization of lutetium is studied using three-stage scheme 5d6s2 2D3/2−5d6s6p 4Fo5/2−5d6s7s 4D3/2−(53375 cm−1)o1/2. It is shown that in a number of cases, there is a limitation of photoionization associated with the features of coherent photoexcitation.

Оптика и спектроскопия•Jan 1, 2022•0 citations

Highly excited even Rydberg series of Lu I studied by two-step laser photoionisation spectroscopy

H. Maeda, Yoshihiro MIZUGAI, Yoshiteru Matsumoto +2 more

The highly excited even levels of the lutetium atom are studied by two-step resonance ionisation spectroscopy. Four Rydberg series, 6s 2 ns 2 S 1/2 (n=17-76), 6s 2 nd 2 D 3/2 (n=14-105), 6s 2 nd 2 D 5/2 (n=19-87) and 6s 2 ng 2 G 9/2 (n=21-61), are measured and analysed. A very weak perturbation from an unassigned J= 3 / 2 even valence level is observed around 6s 2 52d 2 D 3/2 as a dip of ion signals induced by a decrease of radiative lifetimes in the perturbed Rydberg states. Small dips observed in nearby 6s 2 ns 2 S 1/2 and 6s 2 nd 2 D 5/2 Rydberg states are interpreted as the influence of the quadrupole hyperfine interaction of 175 Lu (I= 7 / 2 ).

Journal of Physics B Atomic Molecular and Optical Physics•Sep 28, 1989•16 citations

Numerical studies of isotopic selective photoionization of ytterbium in a three-step ionization scheme

Xiaoyong Lu, Lide Wang

Selective photoionization of ytterbium isotope is studied numerically based on a three-step photoionization scheme, 4f146s2 1S0 (0 cm−1) → 4f146s6p 3P1 (17992.008 cm−1) → (4f136s26p) (7/2, 3/2)2 (35196.98 cm−1) → auto-ionization state (52353 cm−1) → Yb+, by the density matrix theory with the consideration of atomic hyperfine structures and magnetic sublevels. To examine the physical model, the numerical isotopic abundance of ytterbium is compared with that from mass spectroscopy experiment, showing that they are in good agreement with each other. The excitation process and ionization process of ytterbium, especially for odd isotopes, are discussed and analyzed in detail on this basis. The effects of frequency detuning, power densities, spectral bandwidths, polarization of two excitation lasers, and atomic Doppler broadening on the total ionization yield and isotopic abundance are investigated numerically and the optimal excitation conditions for 176Yb enrichment are identified semi-quantitatively.

Chinese Physics B•Oct 19, 2022•5 citations
AbstractThe hyperfine structure of transitions in the three-step scheme 5 d 6 s ^22 D _3/2–5 d 6 s 6 p ^4 F 5/2∘_{{5/2}}^{^\circ }5/2∘​ –5 d 6 s 7 s ^4 D _3/2– (53 375 cm^–1) 1/2∘_{{1/2}}^{^\circ }1/2∘​ of lutetium ionization is studied for ^175Lu, ^176Lu, and ^177Lu isotopes using the photoionization laser spectroscopy method. Values of the magnetic dipole ( A ) and electric quadrupole ( B ) interaction constants are determined, as well as the energies, the isotope shifts, and the radiative lifetimes for the 5 d 6 s 7 s ^4 D _3/2 and (53 375 cm^–1) 1/2∘_{{1/2}}^{^\circ }1/2∘​ levels.
The hyperfine structure of transitions in the three-step scheme 5d6s22D3/2–5d6s6p4F 5/2∘_{{5/2}}^{^\circ }5/2∘​ –5d6s7s4D3/2– (53 375 cm–1) 1/2∘_{{1/2}}^{^\circ }1/2∘​ of lutetium ionization is studied for 175Lu, 176Lu, and 177Lu isotopes using the photoionization laser spectroscopy method. Values of the magnetic dipole (A) and electric quadrupole (B) interaction constants are determined, as well as the energies, the isotope shifts, and the radiative lifetimes for the 5d6s7s4D3/2 and (53 375 cm–1) 1/2∘_{{1/2}}^{^\circ }1/2∘​ levels.
Numerical computations of ionization efficiency and isotope selectivity of 176 L u have been carried out for the following three-step ladder type photoionization scheme, 5 d 6 s 2 2 D 3 / 2 ( 0.0 c m − 1 ) − − − ⟶ 540.4068 n m ⁡ 5 d 6 s 6 p 4 F 5 / 2 o ( 18504.58 c m − 1 ) − − − ⟶ 535.0626 n m 5 d 6 s 7 s 4 D 3 / 2 ( 37193.98 c m − 1 ) − − − ⟶ 618.0061 n m 53375 c m − 1 A u t o i o n i z a t i o n S t a t e → L u + , by invoking the density matrix formalism for the laser–atom interactions. Equations of motion have been derived for the odd isotopes by inclusion of hyperfine levels. The line shapes and their effect on the ionization efficiency and isotope selectivity have been discussed in detail. The effects of power of excitation and ionization lasers, spectral bandwidths, pulse delays, Doppler broadening of the atomic ensemble on the ionization efficiency, and degree of enrichment have been presented. Optimum conditions for the power of excitation, detunings, and other system parameters for the selective yet efficient photoionization of 176 L u have been identified.
We have measured and analyzed the hyperfine structure of two lines, one at 583 nm and one at 401 nm, of the only stable fermionic isotope of atomic erbium as well as determined its isotope shift relative to the four most-abundant bosonic isotopes. Our work focuses on the $J\ensuremath{\rightarrow}J+1$ laser cooling transitions from the [Xe]4f126s2(3H6)[\text{Xe}]4{f}^{12}6{s}^{2}{(}^{3}{H}_{6})[Xe]4f126s2(3H6​) ground state to two levels of the excited [Xe]4f126s6p[\text{Xe}]4{f}^{12}6s6p[Xe]4f126s6p configuration, which are of major interest for experiments on quantum degenerate dipolar Fermi gases. From a fit to the observed spectra of the strong optical transition at 401 nm we find that the magnetic dipole and electric quadrupole hyperfine constants for the excited state are ${A}_{e}/h=\ensuremath{-}100.1(3)\phantom{\rule{0.28em}{0ex}}\mathrm{MHz}$ and ${B}_{e}/h=\ensuremath{-}3079(30)\phantom{\rule{0.28em}{0ex}}\mathrm{MHz}$, respectively. The hyperfine spectrum of the narrow transition at 583 nm, was previously observed and accurate Ae{A}_{e}Ae​ and Be{B}_{e}Be​ coefficients are available. A simulated spectrum based on these coefficients agrees well with our measurements. We have also determined the hyperfine constants using relativistic configuration-interaction ab initio calculations. The agreement between the ab initio and fitted data for the ground state is better than 0.1%, while for the two excited states the agreement is 1% and 11% for the Ae{A}_{e}Ae​ and Be{B}_{e}Be​ constants, respectively.
The highly excited even levels of the lutetium atom are studied by two-step resonance ionisation spectroscopy. Four Rydberg series, 6s 2 ns 2 S 1/2 (n=17-76), 6s 2 nd 2 D 3/2 (n=14-105), 6s 2 nd 2 D 5/2 (n=19-87) and 6s 2 ng 2 G 9/2 (n=21-61), are measured and analysed. A very weak perturbation from an unassigned J= 3 / 2 even valence level is observed around 6s 2 52d 2 D 3/2 as a dip of ion signals induced by a decrease of radiative lifetimes in the perturbed Rydberg states. Small dips observed in nearby 6s 2 ns 2 S 1/2 and 6s 2 nd 2 D 5/2 Rydberg states are interpreted as the influence of the quadrupole hyperfine interaction of 175 Lu (I= 7 / 2 ).
Selective photoionization of ytterbium isotope is studied numerically based on a three-step photoionization scheme, 4f146s2 1S0 (0 cm−1) → 4f146s6p 3P1 (17992.008 cm−1) → (4f136s26p) (7/2, 3/2)2 (35196.98 cm−1) → auto-ionization state (52353 cm−1) → Yb+, by the density matrix theory with the consideration of atomic hyperfine structures and magnetic sublevels. To examine the physical model, the numerical isotopic abundance of ytterbium is compared with that from mass spectroscopy experiment, showing that they are in good agreement with each other. The excitation process and ionization process of ytterbium, especially for odd isotopes, are discussed and analyzed in detail on this basis. The effects of frequency detuning, power densities, spectral bandwidths, polarization of two excitation lasers, and atomic Doppler broadening on the total ionization yield and isotopic abundance are investigated numerically and the optimal excitation conditions for 176Yb enrichment are identified semi-quantitatively.