Lifetime of the 6s6p1P1 level of barium

1970 ◽  
Vol 48 (7) ◽  
pp. 879-883 ◽  
Author(s):  
L. O. Dickie ◽  
F. M. Kelly
Keyword(s):  
Recent Work ◽  
Hollow Cathode ◽  
Atomic Beam ◽  
Resonance Line ◽  
Resonance Radiation ◽  
Zero Field ◽  
Excited Singlet ◽  
Level Crossing ◽  
Hollow Cathode Lamp ◽  
Good Agreement

The lifetime of the first excited singlet P level of barium, 6s6p1P1, has been determined from the width of the zero field level crossing, i.e. the Hanle effect, of the 6s6p1P1 –6s21S0, 5535 Å resonance line. The resonance radiation was produced in a hollow cathode lamp and the scattering atoms by an atomic beam. After taking account of coherence narrowing, the lifetime is determined to be 8.37 ± 0.14 × 10−9 s, in good agreement with other recent work.

scholarly journals Untersuchung des 5p2P3/2-Terms im Silber I-Spektrum durch Resonanzstreuung von Licht in elektrischen und magnetischen Feldern

1971 ◽  
Vol 26 (6) ◽  
pp. 1016-1020 ◽  
Author(s):  
H. Bucka ◽  
D. Einfeld ◽  
J. Ney ◽  
J. Wilken
Keyword(s):  
Hyperfine Structure ◽  
Electric Fields ◽  
Atomic Beam ◽  
Resonance Line ◽  
Positive Sign ◽  
Level Crossing

Abstract Using separated isotopes the hyperfine structure of the 5p 2P3/2-state in Ag I-spectrum was investigated by scattering the resonance line on an atomic beam in parallel magnetic and electric fields. With the theoretical positive sign of the Stark-constant β, the shift of the Heydenburg- and level-crossing-signals with electric fields can be explained by the following parameters: Ag (107) : A = - (32,4 ± 0.5) Mc/sec , Ag (109): A - - (37,3 ± 0.8) Mc/sec , β (2P3/2) = (5.15 ± 0.15) (kc/sec) (kV/cm) -2 , τ (2p3/2) = (6.3 ± 0.6 ) · 10-9 sec.

Lebensdauern der Feinstrukturzustände z4F9/2, z4F7/2, z4G11/2, z4G9/2 und y4G11/2 im Kobalt-I-Spektrum

1969 ◽  
Vol 24 (8) ◽  
pp. 1202-1209
Author(s):  
M. v. Hartrott
Keyword(s):  
Stable Isotope ◽  
Excited States ◽  
Atomic Beam ◽  
Exciting Radiation ◽  
Complex Spectrum ◽  
Zero Field ◽  
Level Crossing ◽  
Crossing Experiment ◽  
Structure Splitting ◽  
The One

AbstractAtomic lifetimes of 5 excited states in the Co-I spectrum are determined by a zero field level-crossing experiment. Because of the complex spectrum of Co the radiation scattered by the atomic beam is carefully analysed to establish a correspondence of the observed signals to well defined finestructure levels. Since Co has only the one stable isotope 59Co, the influence of the hyperfine-structure splitting on the width of the depolarisation curves is estimated with special reference to the spectral distribution of the exciting radiation. The following values for lifetimes are deduced:τ(z4F9/2) = 0.6 × 10-7 s, τ(z4F7/2) = 0.8 × 10-7 s,τ(z4F11/2) = 1.1 × 10-7 s, τ(z4F9/2) = 1.3 × 10-7 s,τ(γ4G11/2) = 0.6 × 10-8 s.

The Influence of Operating Parameters on the Profile of the Calcium 422.67 nm Resonance Line Emitted by a Demountable Hollow Cathode Lamp

1976 ◽  
Vol 30 (2) ◽  
pp. 162-167 ◽  
Author(s):  
D. G. Bevan ◽  
G. F. Kirkbright
Keyword(s):  
Hollow Cathode ◽  
Resonance Line ◽  
Operating Parameters ◽  
Hollow Cathode Lamp ◽  
Integrated Intensity ◽  
Lamp Source

The profile and integrated intensity of the calcium 422.67 nm resonance line from a commercially available demountable hollow cathode lamp have been examined using several filler gases at pressures between 1 and 7 Torr and operating currents in the range of 6 to 30 mA. The results are interpreted in terms of the reduced Doppler and self-absorption broadening obtained in this source compared to these effects in a commercially available, sealed, neon-filled hollow cathode lamp source.

TEMPORAL BEHAVIOUR OF THE OPTOGALVANIC SIGNAL IN A HOLLOW CATHODE LAMP

1983 ◽  
Vol 44 (C7) ◽  
pp. C7-479-C7-487 ◽  
Author(s):  
M. Broglia ◽  
F. Catoni ◽  
P. Zampetti
Keyword(s):  
Hollow Cathode ◽  
Temporal Behaviour ◽  
Hollow Cathode Lamp

Disorientation of Cs(62P1/2) atoms, induced in collisions with noble gases

1976 ◽  
Vol 54 (7) ◽  
pp. 748-752 ◽  
Author(s):  
B. Niewitecka ◽  
L. Krause
Keyword(s):  
Cross Sections ◽  
Noble Gas ◽  
Zero Magnetic Field ◽  
Zero Field ◽  
Buffer Gas ◽  
Resonance Fluorescence ◽  
Circularly Polarized ◽  
Low Field ◽  
Good Agreement ◽  
Gas Pressures

The disorientation of 62P1/2 cesium atoms, induced in collisions with noble gas atoms in their ground states, was systematically investigated by monitoring the depolarization of cesium resonance fluorescence in relation to noble gas pressures. The Cs atoms, contained together with a buffer gas in a fluorescence cell and located in zero magnetic field, were excited and oriented by irradiation with circularly polarized 8943 Å resonance radiation, and the resonance fluorescence, emitted in an approximately backward direction, was analyzed with respect to circular polarization. The experiments yielded the following disorientation cross sections which have been corrected for the effects of nuclear spin: Cs–He: 4.9 ± 0.7 Å2; Cs–Ne: 2.1 ± 0.3 Å2; Cs–Ar: 5.6 ± 0.8 Å2; Cs–Kr: 5.8 ± 0.9 Å2; Cs–Xe: 6.3 ± 0.9 Å2. The results are in good agreement with most of the available zero-field and low-field data.

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