Fast-ion-beam laser-induced-fluorescence measurements of spontaneous-emission branching ratios  and oscillator strengths in Sm II

We measured the spontaneous-emission branching ratios of 69 levels in Sm II selectively populated via single-frequency laser excitation of a 10 keV ion beam. The levels studied had term energies up to 29 600 cm–1, and decay branches with spontaneous emission in the range 250–850 nm were detected. The experimental accuracy was in the range of 10%. We used these branching ratios along with our previously determined radiative lifetimes to infer transition probabilities and oscillator strengths for 608 transitions in the wavelength range 363–771 nm, which are useful for stellar abundance determinations.PACS Nos.: 32.70.Cs, 95.30.Ky

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Fast-ion-beam laser-induced-fluorescence measurements of branching fractions and oscillator strengths in Nd II

Canadian Journal of Physics ◽

10.1139/p07-077 ◽

2007 ◽

Vol 85 (12) ◽

pp. 1343-1379 ◽

Cited By ~ 5

Author(s):

R Li ◽

S J Rehse ◽

T J Scholl ◽

A Sharikova ◽

R Chatelain ◽

...

Keyword(s):

Spontaneous Emission ◽

Transition Probabilities ◽

Ion Beam ◽

Branching Fractions ◽

Oscillator Strengths ◽

Single Frequency ◽

Beam Laser ◽

Fluorescence Measurements ◽

Frequency Laser ◽

Fast Ion

We measured the spontaneous-emission branching fractions of 46 levels in Nd II, selectively populated via single-frequency laser excitation of a 10 keV ion beam. The levels studied had term energies up to 29 955 cm–1, and decay branches with spontaneous emission in the range 372–850 nm were detected. The experimental accuracy for branching fractions over 0.1 was ~7%. We used these branching fractions along with our previously determined radiative lifetimes to infer transition probabilities and oscillator strengths for 430 transitions, which are useful for stellar abundance determinations. PACS Nos.: 32.70Cs, 95.30Ky

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Fast-ion-beam laser-fluorescence measurements of oscillator strengths in the lanthanides

Physica Scripta ◽

10.1088/0031-8949/2009/t134/014012 ◽

2009 ◽

Vol T134 ◽

pp. 014012 ◽

Cited By ~ 2

Author(s):

R A Holt ◽

R Li ◽

R Chatelain ◽

S J Rehse ◽

S D Rosner ◽

...

Keyword(s):

Ion Beam ◽

Laser Fluorescence ◽

Oscillator Strengths ◽

Beam Laser ◽

Fluorescence Measurements ◽

Fast Ion

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Parametric study of hyperfine structure of Zr II even-parity levels

Canadian Journal of Physics ◽

10.1139/cjp-2016-0316 ◽

2016 ◽

Vol 94 (12) ◽

pp. 1310-1313 ◽

Cited By ~ 5

Author(s):

Safa Bouazza

Keyword(s):

Hyperfine Structure ◽

Ion Beam ◽

Model Space ◽

Laser Fluorescence ◽

Beam Laser ◽

Extended Space ◽

Experimental Values ◽

The One ◽

Fast Ion ◽

Laser Fluorescence Spectroscopy

Until now experimental hyperfine structure (hfs) data of 12 even-parity Zr II levels were given in the literature. Recently new hyperfine splitting measurements of 11 other Zr II levels, of the same parity are achieved, applying fast-ion-beam laser-fluorescence spectroscopy. The hfs of these 23 gathered levels has been analysed by simultaneous parametrisation of the one- and two-body interactions, first in model space (4d + 5s)3 and secondly in extended space. For the three lowest configurations, radial parameters of the magnetic dipole A and quadrupole electric B factors are deduced in their entirety for 91Zr II, compared and discussed with calculated values, available in the literature, and also with ours, computed by means of the ab initio method. For instance we give the main experimental values of the extracted single-electron hfs parameters of 4d25s: [Formula: see text] = –2701 MHz, [Formula: see text] = –122.4 MHz, and [Formula: see text] = –113.5 MHz.

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