Spectroscopy of alkali-metal atoms in dense supercritical<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>4</mml:mn></mml:msup></mml:math>He at low temperatures

Moroshkin, Peter; Lebedev, Victor; Weis, A.

doi:10.1103/physreva.87.022513

Cited by 4 publications

(3 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For large interatomic distance, the shown curves asymptotically approach the energy of rubidium atoms in the 5S 1/2 , 5P 1/2 , and 5P 3/2 electronic states. Using such potential curves, we have for a more complete characterization of our system calculated both absorption and emission lineshapes of the rubidium D-lines in the high pressure argon buffer gas regime, following standard methods of a unified line broadening theory [13,18,19], see the Supplemental Information. Typical calculated results for the rubidium D-lines absorption and emission spectra are shown in Fig.…”

mentioning

confidence: 99%

Kennard-Stepanov Relation Connecting Absorption and Emission Spectra in an Atomic Gas

et al. 2014

View full text Add to dashboard Cite

The Kennard-Stepanov relation describes a thermodynamic, Boltzmann-type scaling between the absorption and emission spectral profiles of an absorber, which applies in many liquid state dye solutions as well as in semiconductor systems. Here we examine absorption and emission spectra of rubidium atoms in a dense argon buffer gas environment. We demonstrate that the Kennard-Stepanov relation between absorption and emission spectra is well fulfilled in the collisionally broadened atomic gas system. Our experimental findings are supported by a simple theoretical model.

show abstract

mentioning

confidence: 99%

Kennard-Stepanov Relation Connecting Absorption and Emission Spectra in an Atomic Gas

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Depending on the temperature, a large part of the line profile in the region below the SVP is red-shifted. Our observations are important as a benchmark for theory [64][65][66][67][68][69][70] and will contribute to a better understanding of collisional processes, including in the atmosphere of the sun, and other stars and exoplanets [67][68][69][70][71][72][73][74][75][76]. Our studies are also relevant to an understanding of micro-solvation.…”

Section: Introductionmentioning

confidence: 75%

Atomic fluorescence emitted from a corona discharge in helium above and below saturated vapour pressure

et al. 2018

View full text Add to dashboard Cite

Abstract.A new apparatus was constructed to investigate the visible and near infrared fluorescence spectroscopy of electronically excited helium over a wide range of pressures and temperatures, covering both the gaseous and liquid phases. To achieve sufficient throughput, increased sensitivity was established by employing a micro-discharge cell and a high performance lens system that allows for a large collection solid angle. With this set-up, several thousand spectra were recorded. The atomic 3s1 S → 2p 1 P and 3s 3 S → 2p 3 P atomic transitions showed line shifts, spectral broadening and intensity changes that were dependent in magnitude on pressure, temperature and thermodynamic phase. While in the gas phase the lines showed little dependency on the discharge cell temperature, the opposite was observed for the liquid phase, suggesting that a significant number of atoms were solvated. Triplet lines were up to a factor of 50 times stronger in intensity than the singlet lines, depending on pressure. When taking the particle density into account, this effect was stronger in the gas phase than in the liquid phase of helium. This was attributed to the recombination of He2 + , He3 + and He4 + with electrons, which is facilitated in the gas phase because of the significantly higher mobility.

show abstract

“…Kanorsky et al demonstrated optical pumping of cesium atoms trapped in solid He and performed ESR spectroscopy with milliHertz resolution 18 . The group of Weis performed detailed optical spectroscopic studies of Cs atoms in solid He 36,37 . Magnetic rare-earth atoms such as thulium have also been isolated and studied in solid He, and narrow lines for electronic transitions have been observed 38 .…”

Section: Magnetic Atom Impurities In Inert Matricesmentioning

confidence: 99%

Controllable quantum spin glasses with magnetic impurities embedded in quantum solids

et al. 2013

View full text Add to dashboard Cite

Magnetic impurities embedded in inert solids can exhibit long coherence times and interact with one another via their intrinsic anisotropic dipolar interaction. We argue that, as a consequence of these properties, disordered ensembles of magnetic impurities provide an effective platform for realizing a controllable, tunable version of the dipolar quantum spin glass seen in LiHoxY1−xF4.Specifically, we propose and analyze a system composed of dysprosium atoms embedded in solid helium. We describe the phase diagram of the system and discuss the realizability and detectability of the quantum spin glass and antiglass phases.

show abstract

Spectroscopy of alkali-metal atoms in dense supercritical4He at low temperatures

Cited by 4 publications

References 42 publications

Kennard-Stepanov Relation Connecting Absorption and Emission Spectra in an Atomic Gas

Kennard-Stepanov Relation Connecting Absorption and Emission Spectra in an Atomic Gas

Atomic fluorescence emitted from a corona discharge in helium above and below saturated vapour pressure

Controllable quantum spin glasses with magnetic impurities embedded in quantum solids

Contact Info

Product

Resources

About