| 1. |
- Grundevik, P, et al.
(författare)
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Hyperfine-structure study in the P sequence of 23 Na using quantum-beam spectroscopy
- 1979
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Ingår i: Journal of Physics B: Atomic and Molecular Physics. - : IOP Publishing. - 0022-3700. ; 12:16
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Tidskriftsartikel (refereegranskat)abstract
- Describes use of the quantum-beat method to study hyperfine structure in the 5 2 P 3/2 and 6 2 P 3/2 states of 23 Na. A pulsed dye laser, frequency-doubled into the UV region, was used to excite sodium atoms abruptly in a beam. The fluorescent light was recorded with a fast transient digitiser, interfaced to a micro-computer. Theoretical calculations using many-body perturbation theory were performed for the entire P sequence measured so far, taking polarisation and correlation effects into account separately. Very good agreement between experimental and theoretical values was obtained.
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| 2. |
- Gustavsson, M, et al.
(författare)
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An efficient method for measuring atomic and molecular lifetimes using a modulated or deflected CW dye laser beam
- 1977
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Ingår i: Physics Letters. Section A: General, Atomic and Solid State Physics. - : Elsevier BV. - 0375-9601. ; 64:3, s. 289-291
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Tidskriftsartikel (refereegranskat)abstract
- By pulse modulating or deflecting a CW dye laser beam, cascade-free lifetime determinations at high spectral resolution can be performed with the decayed-coincidence technique using measuring times of about 1 minute. The method is illustrated by lifetime measurements for the 72P3/21/2 levels of cesium.
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| 3. |
- Gustavsson, M, et al.
(författare)
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Lifetime measurements for excited states of rare-earth atoms using pulse modulation of a cw dye-laser beam
- 1979
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Ingår i: Journal of the Optical Society of America. ; 69:7, s. 984-992
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Tidskriftsartikel (refereegranskat)abstract
- By pulse-modulating a cw dye-laser beam and employing the delayed-coincidence technique, we have determined the natural radiative lifetimes of a number of atomic states in rare-earth atoms Eu, Dy, and Yb. In the measurements, which were performed on an atomic beam, exponential decay curves with good statistics were obtained using short measuring times. The general features of the technique are discussed. When possible, oscillator strengths are deduced and compared with literature values.
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| 4. |
- Lundberg, Hans, et al.
(författare)
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Hyperfine structure in the sequence of sodium S states
- 1977
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Ingår i: Journal of Physics B: Atomic and Molecular Physics. - : IOP Publishing. - 0022-3700. ; 10:10, s. 1971-1978
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Tidskriftsartikel (refereegranskat)abstract
- The hyperfine structure for the 6, 7 and 8 2 S 1/2 states of 23 Na was measured by optical double-resonance techniques. The states were populated by step-wise excitation using two CW dye lasers. For the dipole interaction constant a, a(6 2 S 1/2 ) = 37.5(2) MHz, a(7 2 S 1/2 )=20.9(1) MHz, a(8 2 S 1/2 )=12.85(10) MHz. were obtained. Theoretical calculations of the hyperfine structure were performed for the 3-8 2 S 1/2 states using many-body perturbation techniques. When polarization as well as certain correlation effects are included in the calculation, an agreement with the experimental values within 2% is obtained.
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