1997年
Laser spectroscopy of thulium atoms implanted in liquid and solidHe
Physical Review B - Condensed Matter and Materials Physics
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- 巻
- 56
- 号
- 2
- 開始ページ
- 780
- 終了ページ
- 787
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevB.56.780
The excitation, emission spectra, and decay curves of the emission intensity of thulium atoms implanted in liquid and solid helium were observed in the presence and absence of an external magnetic field. The observed narrow line (width (Formula presented) nm) of the excitation spectrum at 590.60 nm is assigned as a zero-phonon transition from the electronic ground state (Formula presented), which indicates that the transition between the inner shells is weakly perturbed by surrounding helium atoms. The pressure dependence of the emission wavelength suggests that the symmetry of helium atoms distributed around a thulium atom in the solid phase is similar to that in the liquid phase. The emission intensity was stable and large in the solid phase since thulium atoms were trapped at a density of 10(Formula presented)-10(Formula presented) atoms/cm(Formula presented). The lifetime of the excited state was measured to be (Formula presented)s, which was longer than that of the (Formula presented) state of free thulium atoms. The excited state is expected to be a mixed state of the (Formula presented) and (Formula presented) configurations. The metastable state (Formula presented) is populated by a radiative transition from this excited state and relaxes to the ground state through a magnetic dipole transition. The lifetime of the metastable state of a neutral thulium atom was measured to be (Formula presented) ms. © 1997 The American Physical Society.
- ID情報
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- DOI : 10.1103/PhysRevB.56.780
- ISSN : 1550-235X
- ISSN : 1098-0121
- SCOPUS ID : 0001311106