| 1. |
- Garpman, S, et al.
(författare)
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Lifetimes of some highly excited levels in the Pb-I spectrum measured by the Hanle method
- 1971
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Ingår i: Zeitschrift für Physik A Hadrons and Nuclei. - 0939-7922. ; 241:3, s. 217-235
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Tidskriftsartikel (refereegranskat)abstract
- Natural lifetimes of some highly excited levels in the Pb-I spectrum have been measured by the zero field level crossing (Hanle) method. The levels were reached by optical excitation from the metastable 6p2 3P2 and 6p2 3P1 states, were a considerable population had been created by means of adc discharge in a Pb atomic beam. An atomic beam source producing atoms in metastable states is described. For the lifetimes t of the investigated levels we find:t(6p(1/2)6d3D1)=3.74(28) ns,t(6p(1/2)6d3F2)=25.8(1.3) ns,t(6p(1/2)6d3D2)=4.17(-31)(-49) ns,t(6p(1/2)6d3F3)=6.08(26) ns,t(6p(3/2)7s)3P2=5.85(27) ns. These results are compared with lifetimes derived from oscillator strengths given in the literature.
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| 2. |
- Garpman, S, et al.
(författare)
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Optical double resonance and zero field level crossing spectroscopy applied to the 5p^(3)6s^(5)S_(2) level in the Te-I spectrum
- 1971
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Ingår i: Zeitschrift für Physik A Hadrons and Nuclei. - 0939-7922. ; 247:3, s. 238-251
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Tidskriftsartikel (refereegranskat)abstract
- As a first application of optical double resonance and zero field level crossing spectroscopy to the elements of the sixth group in the periodic table of the atoms, the 5p36s5S2 level in the Te-I spectrum was investigated using natural tellurium in a high temperature quartz cell. For the electronic Landé-factor and the natural radiative lifetime the following values were obtained:$$g_J \left( {5p^3 6s^5 S_2 } \right) = - 1.9657\left( {12} \right),\tau \left( {5p^3 6s^5 S_2 } \right) = 71.8\left( {2.2} \right)ns.$$
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| 3. |
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| 4. |
- Svanberg, Sune, et al.
(författare)
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Redetermination of the hyperfine structure of the 6p^(2)P_(3/2) level in Cs 133 by the zero field optical double resonance method
- 1972
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Ingår i: Zeitschrift für Physik A Hadrons and Nuclei. - 0939-7922. ; 251:1, s. 1-5
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Tidskriftsartikel (refereegranskat)abstract
- By combining recent level crossing data with the results from a modified atomic beam experiment by Buck, Rabi, and Senitzky in 1956, a Landégj factor deviating about 0.6% from the LS-value -1.3341 is obtained for the 6p2P3/2 level of Cs133. As this large deviation is difficult to explain, a remeasurement of the hyperfine structure of this level was performed by the zero field optical double resonance method. For the magnetic dipole and the electric quadrupole interaction constantsa andb we obtain$$a(6p{}^2P_{{3 \mathord{\left/ {\vphantom {3 2}} \right. \kern-\nulldelimiterspace} 2}} ) = 50.31(5)MHz,b(6p{}^2P_{{3 \mathord{\left/ {\vphantom {3 2}} \right. \kern-\nulldelimiterspace} 2}} ) = - 0.30(33)MHz.$$ With these new values agj factor of -1.3341 (15) is deduced for the 6p2P3/2 level of Cs133, in agreement with the LS-value.
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