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1

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High-resolution VUV spectroscopy using pulsed laser sources (1994)

Larsson, J. ; Svanberg, S.

Springer

Applied physics 59 (1994), S. 433-436

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ISSN: 1432-0649

Keywords: 42.62.Fi ; 35.10.Fk ; 32.70.Fw

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract The resonance spectroscopic techniques - level-crossing, optical double resonance and quantum-beat spectroscopy - have been employed following pulsed laser excitation. The use of pulsed lasers has enabled spectroscopic studies of atomic structures and radiative lifetimes in the UV/VUV spectral region.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01081065

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2

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Radiative lifetime determination for the 3s4p-1P1 state of magnesium using pulsed level-crossing spectroscopy (1993)

Larsson, J. ; Svanberg, S.

Springer

The European physical journal 25 (1993), S. 127-129

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ISSN: 1434-6079

Keywords: 32.70.Fw ; 32.80.Bx

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract The natural radiative lifetime of the 3s4p 1 P 1 level of neutral magnesium was measured by pulsed level-crossing spectroscopy at the short excitation wavelength of 202.6 nm. We obtained τ=13.4(5) ns for this state, strongly deviating from a previous beam-foil result, but in good agreement with a multi-configuration Hartree-Fock calculation. A discussion of the applicability of the pulsed Hanle effect method is given.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01450164

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3

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Investigation of shifts and interaction of signals in high-contrast transmission spectroscopy (1991)

Zhankui, Jiang ; Persson, A. ; Sturesson, L. ; [et al.]

Springer

The European physical journal 21 (1991), S. 315-322

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ISSN: 1434-6079

Keywords: 42.65.Ft ; 32.70.Jz

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract In the recently introduced high-contrast transmission version of saturated absorption laser spectroscopy, narrow signals are obtained from dense atomic samples subject to strong pumping. A study of possible systematic shifts of the signals in this domain of rather extreme experimental conditions was performed in order to assess the validity of spectroscopic data obtained with this technique. Certain signal components were found to be slightly shifted while others were not. Further, a theoretical study of the behaviour of overlapping signals in the high-contrast regime is presented. In particular, the question of whether structures buried under the natural linewidth could be resolved is addressed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01438403

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4

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Determination of radiative lifetimes in the 3snp 1 P 1 sequence of Mg I using time-resolved VUV laser spectroscopy (1993)

Larsson, J. ; Zerne, R. ; Persson, A. ; [et al.]

Springer

The European physical journal 27 (1993), S. 329-331

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ISSN: 1434-6079

Keywords: 32.70.Fw

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract The radiative lifetimes of the states in the (n=5–8) 3snp 1 P 1 sequence of neutral magnesium were investigated using time-resolved laser-induced fluorescence. Excitation from the 3s 2 1 S 0 ground state was performed using VUV radiation, which was produced by resonant sum-difference frequency mixing in a krypton gas cell. We find τ(n=5): 54(3) ns, τ(n=6): 140(10) ns, τ(n=7): 290(20) ns. τ(n=8): 475(40) ns. These results were found to be in fair agreement with a Multi Configuration Hartree-Fock (MCHF) calculation.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01437465

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5

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Lifetime measurements in Gd II and Gd III using time-resolved laser spectroscopy (2001)

Zhang, Z.G. ; Persson, A. ; Li, Z.S. ; [et al.]

Springer

The European physical journal 13 (2001), S. 301-304

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ISSN: 1434-6079

Keywords: PACS. 32.70.Cs Oscillator strengths, lifetimes, transition moments – 42.62.Fi Laser spectroscopy

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract: Natural radiative lifetimes of 20 levels (energy range between 29 000-35 000 cm-1) in Gd II and 5 levels (energy range between 43 000-49 000 cm-1) in Gd III have been measured using time-resolved laser-induced fluorescence in a laser-produced plasma.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s100530170245

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6

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Studies on radiative lifetimes in the 4d 10 ns2 S and 4d 10 nd 2 D sequences of neutral silver (1990)

Zhankui, Jiang ; Jönsson, P. ; Larsson, J. ; [et al.]

Springer

The European physical journal 17 (1990), S. 1-4

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ISSN: 1434-6079

Keywords: 32.70.Fw

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract We have performed lifetime measurements in the sequences of2 S 1/2 and2 D 3/2 states for the alkali-like 4d 10 ns,nd configurations of neutral silver. Selective stepwise excitations from the 4d 10 5s 2 S 1/2 ground state were performed using two pulsed dye lasers. Optical transients were recorded and evaluated with regard to the decay time. The lifetime results are compared with those of a theoretical study in which a model potential has been used to describe the polarisation of the 4d shell.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01437488

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7

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Lifetime measurements in Tm I, Tm II, and Tm III by time-resolved laser spectroscopy (2003)

Xu, H.-L. ; Jiang, Z.-K. ; Svanberg, S.

Springer

The European physical journal 23 (2003), S. 323-326

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ISSN: 1434-6079

Keywords: PACS. 32.70.Cs Oscillator strengths, lifetimes, transition moments – 42.62.Fi Laser spectroscopy

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract: Natural radiative lifetimes of eight levels in Tm I ( 4f 135d6p and 4f 125d6s 2 configurations), two levels in Tm II ( 4f 125d6s configuration) and three levels in Tm III (4f 125d configuration) have been measured by using time-resolved laser spectroscopy. Free thulium atoms, as well as singly and doubly ionized ions, were obtained in a laser-induced thulium plasma and the investigated states were selectively populated by a single-step excitation process with a tunable narrow-band laser pulse.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1140/epjd/e2003-00055-3

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8

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Accurate time-resolved laser spectroscopy on sputtered metal atoms (1989)

Carlsson, J. ; Sturesson, L. ; Svanberg, S.

Springer

The European physical journal 11 (1989), S. 287-293

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ISSN: 1434-6079

Keywords: 32.70.Fw ; 42.50.Md

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract The delayed coincidence photon counting technique, employing a picosecond tunable dye laser as an excitation source, has been used for accurate determinations of radiative lifetimes of excited states. Excitation from meta-stable states of sputtered atoms was employed. We obtained for Cu: τ(3d 10 4p 2 P 1/2 = 7.27(0.06) ns, τ(3d 10 4p 2 P 3/2) = 7.17(0.06) ns and for Fe: τ(3d 7 4p y 3 F 2)= 9.06(0.16) ns, τ(3d 7 4p y 3 F 3) = 9.06(0.13) ns and τ(3d 7 4p y 3 F 4) = 9.11 (0.16) ns. Also, the ability of this technique to record quantum beats at frequencies up to 1 GHz is demonstrated.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01438501

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9

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Oscillator strengths for resonance transitions in neutral selenium and tellurium derived from time-resolved laser spectroscopy (1992)

Bengtsson, G. J. ; Berzinsh, U. ; Larsson, J. ; [et al.]

Springer

The European physical journal 23 (1992), S. 29-32

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ISSN: 1434-6079

Keywords: 32.70.Fw

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract We have measured radiative lifetimes for selenium and tellurium resonance levels by using short pulse laser excitation in differentially heated resonance cells. We obtained τ(3 S 1 Se I)=2.9(5) ns and τ(3 S 1 Te I)=3.1(5) ns, which together with branching ratio values given by Ubelis and Berzinsh yield the absorption oscillator strengthf abs(Se I, 196.0 nm)=0.074(16) andf abs(Te I, 214.3 nm)=0.098(17).

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01436699

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10

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Experimental and theoretical lifetimes in Yb III (2001)

Zhang, Z.G. ; Li, Z.S. ; Svanberg, S. ; [et al.]

Springer

The European physical journal 15 (2001), S. 301-305

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ISSN: 1434-6079

Keywords: PACS. 32.70.Cs Oscillator strengths, lifetimes, transition moments – 42.62.Fi Laser spectroscopy

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract: Lifetimes of three levels belonging to the configuration 4f 135d with J = 1 in Yb III have been measured for the first time using the time-resolved laser-induced fluorescence method. Experimental transition probabilities have been deduced for the transitions between the levels studied and the ground state. The comparison of the experimental lifetimes with theoretical data, deduced within the relativistic Hartree-Fock (HFR) approach, underlines the dramatic importance of an adequate consideration of core-polarization effects in the theoretical model and the sensitivity of one of the lifetime values to small correlation effects.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s100530170144

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