Radiative properties of neutral germanium obtained from excited-state lifetime and branching-ratio measurements and comparison with theoretical calculations
(1999) In Physical Review A (Atomic, Molecular and Optical Physics) 60(1). p.198-208- Abstract
- Using time-resolved UV laser-induced fluorescence from a laser-produced plasma, natural radiative lifetimes have been measured for 21 levels of Ge I belonging to the odd-parity 4p4d, 4p5d, and 4p6s configurations. Stimulated Brillouin scattering in water has allowed us to compress Nd:YAG laser pulses pumping a dye laser (where YAG denotes yttrium aluminum garnet), thus yielding 1-ns tunable laser pulses to enable accurate measurements of short lifetimes. Branching ratios of Ge I have been measured by inductively coupled plasma emission spectrometry, the intensity calibration being performed by means of Ar lines emitted by a hollow-cathode lamp. The experimental lifetimes and branching ratios have been combined in order to provide a set of... (More)
- Using time-resolved UV laser-induced fluorescence from a laser-produced plasma, natural radiative lifetimes have been measured for 21 levels of Ge I belonging to the odd-parity 4p4d, 4p5d, and 4p6s configurations. Stimulated Brillouin scattering in water has allowed us to compress Nd:YAG laser pulses pumping a dye laser (where YAG denotes yttrium aluminum garnet), thus yielding 1-ns tunable laser pulses to enable accurate measurements of short lifetimes. Branching ratios of Ge I have been measured by inductively coupled plasma emission spectrometry, the intensity calibration being performed by means of Ar lines emitted by a hollow-cathode lamp. The experimental lifetimes and branching ratios have been combined in order to provide a set of accurate transition probabilities for the 4p-5s and 4p-4d transitions. A relativistic Hartree-Fock; calculation, taking configuration-interaction and polarization effects into account, has been combined with a least-squares optimization procedure of the Slater and spin-orbit integrals in order to test the ability of this approach to correctly predict radiative properties of the group-IV elements. Good agreement between experimental and theoretical transition probability values has been achieved for most of the transitions considered. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2258779
- author
- Li, Z. S ; Norin, J ; Persson, Anders LU ; Wahlström, Claes-Göran LU ; Svanberg, Sune LU ; Doidge, P. S and Biemont, E
- organization
- publishing date
- 1999
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review A (Atomic, Molecular and Optical Physics)
- volume
- 60
- issue
- 1
- pages
- 198 - 208
- publisher
- American Physical Society
- external identifiers
-
- scopus:0001822791
- ISSN
- 1050-2947
- DOI
- 10.1103/PhysRevA.60.198
- language
- English
- LU publication?
- yes
- id
- 3f717dd1-f87f-4ddd-a789-19b17c7870f4 (old id 2258779)
- date added to LUP
- 2016-04-04 06:57:57
- date last changed
- 2022-03-15 06:20:33
@article{3f717dd1-f87f-4ddd-a789-19b17c7870f4, abstract = {{Using time-resolved UV laser-induced fluorescence from a laser-produced plasma, natural radiative lifetimes have been measured for 21 levels of Ge I belonging to the odd-parity 4p4d, 4p5d, and 4p6s configurations. Stimulated Brillouin scattering in water has allowed us to compress Nd:YAG laser pulses pumping a dye laser (where YAG denotes yttrium aluminum garnet), thus yielding 1-ns tunable laser pulses to enable accurate measurements of short lifetimes. Branching ratios of Ge I have been measured by inductively coupled plasma emission spectrometry, the intensity calibration being performed by means of Ar lines emitted by a hollow-cathode lamp. The experimental lifetimes and branching ratios have been combined in order to provide a set of accurate transition probabilities for the 4p-5s and 4p-4d transitions. A relativistic Hartree-Fock; calculation, taking configuration-interaction and polarization effects into account, has been combined with a least-squares optimization procedure of the Slater and spin-orbit integrals in order to test the ability of this approach to correctly predict radiative properties of the group-IV elements. Good agreement between experimental and theoretical transition probability values has been achieved for most of the transitions considered.}}, author = {{Li, Z. S and Norin, J and Persson, Anders and Wahlström, Claes-Göran and Svanberg, Sune and Doidge, P. S and Biemont, E}}, issn = {{1050-2947}}, language = {{eng}}, number = {{1}}, pages = {{198--208}}, publisher = {{American Physical Society}}, series = {{Physical Review A (Atomic, Molecular and Optical Physics)}}, title = {{Radiative properties of neutral germanium obtained from excited-state lifetime and branching-ratio measurements and comparison with theoretical calculations}}, url = {{https://lup.lub.lu.se/search/files/5118888/2297395.pdf}}, doi = {{10.1103/PhysRevA.60.198}}, volume = {{60}}, year = {{1999}}, }