Effective scheme of photoionization of ytterbium atoms for laser separation of isotopes

Krynetskiǐ, B. B.; Mishin, V. A.; Prokhorov, A. M.

doi:10.1007/bf00665571

Cited by 12 publications

(6 citation statements)

References 8 publications

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“…Among the states in the figure, the state located at 52349.89 cm ' has the largest signal. The electronic configuration of this state was expected to be 4f ' 6s6p from the consideration of a very large transition cross section [18]. The J values of the states shown in the figure are in disagreement with their assignment.…”

Section: Introductionmentioning

confidence: 90%

Autoionizing states of the ytterbium atom by three-photon polarization spectroscopy

Lee

Kong

1995

Phys. Rev. A

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The autoionizing states of ytterbium (Yb) were investigated by three-photon polarization spectroscopy. Ytterbium atoms were excited to autoionizing states through the transition 6s 'So -6s6p P, 4f' -( F7/2)6s 6p3/2 (J =2). The total angular momenta J of the autoionizing states were identified by comparing the line intensities from the spectra recorded with different combinations of the laser polarization. In this work, 17 autoionizing states including many new ones were investigated. For all these states Fano parameters and Jvalues are measured. PACS number(s): 32.80.Dz, 32.80.Fb, 32.70.Jz

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Section: Introductionmentioning

confidence: 90%

Autoionizing states of the ytterbium atom by three-photon polarization spectroscopy

Lee

Kong

1995

Phys. Rev. A

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“…[22] Based on the measurement of excited state lifetimes and spectral linewidths in Ref. [23], the reduced matrix elements J |d|J of the first transition and the second transition are set to 4.66 × 10 −30 C•m and 1.15 × 10 −30 C•m respectively. [20,22] The photoionization cross section σ ion is taken as 6.7 × 10 −20 m 2 for the entire hyperfine structures of the second excited state.…”

Section: Resultsmentioning

confidence: 99%

“…[20,22] The photoionization cross section σ ion is taken as 6.7 × 10 −20 m 2 for the entire hyperfine structures of the second excited state. [23] The lifetimes of the first and second excited states are 840 ns and 1120 ns respectively. [23] The fourth-order Runge-Kutta algorithm is adopted in simulations, and the time step is set to 0.01 ns for accuracy.…”

Section: Resultsmentioning

confidence: 99%

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

Liu¹,

Wang²

2023

Chinese Phys. B

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Numerical studies of selective photoionization of ytterbium isotope have been carried out based on a three-step photoionization scheme, 4f 146s 2 1S0 (0 cm-1) → 4f 146s6p 3P1 (17992.008 cm-1) → (4f 136s 26p) (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 abundances of ytterbium are compared with those of mass spectroscopy experiments and good agreements are acquired. The excitation and ionization processes of ytterbium are discussed and analyzed in detail on this basis, especially for odd isotopes. 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 presented numerically and the optimization excitation conditions for 176Yb enrichment are identified semi-quantitatively.

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“…The scheme is presented as 6'So (0 cm ') -+6 P, (17992 cm ')~( -'"-', )z ( 35192 cm ') [4]. The The dipole moments of the first and the second transitions are known to be 0.…”

Section: Applicationsmentioning

confidence: 99%

Effective excitation method of a three-level medium in a selective photoionization

et al. 1995

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A principle for the e%cient excitation of a three-level medium in a selective photoionization method is examined. It is shown that with special detunings for a given set of the laser-atom interaction the third-level population can be maximized. The expression of the optimal detunings is derived near the two-photon resonance region. It is shown that if the optimal detuning method is applied to three-level systems of Yb and Ca, the first-level populations are inverted to their corresponding third levels by about 100% and 86%, respectively. Application of this method to a Doppler-broadened medium is discussed and it is found that the optimal detuning method with counterpropagating waves will be very effective for selective ionization of wanted atoms.PACS number(s): 32.80.Fb, 32.80.8x

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Effective scheme of photoionization of ytterbium atoms for laser separation of isotopes

Cited by 12 publications

References 8 publications

Autoionizing states of the ytterbium atom by three-photon polarization spectroscopy

Autoionizing states of the ytterbium atom by three-photon polarization spectroscopy

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

Effective excitation method of a three-level medium in a selective photoionization

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