Physics

A Fragile Union Between Li and He Atoms

Břetislav Friedrich

Published Apr 8, 2013• 18 citations

Abstract

The LiHe van der Waals molecule has been produced and spectroscopically detected and its binding energy found to only suffice to stabilize a single rotationless vibrational state.

DOI: 10.1103/physics.6.42

Related papers

Spectroscopic Detection of the Lithium Helium (LiHe) van der Waals Molecule

Al Taisan, Nada Ahmed

Jan 1, 20130 citations

Spectroscopic Detection of the LiHe Molecule

Naima Tariq, Nada Al Taisan, Vijay Singh +1 more

We use cryogenic helium buffer-gas cooling to form large densities of lithium atoms in a high-density helium gas, from which LiHe molecules form by three-body recombination. These weakly bound van der Waals molecules are detected spectroscopically, and their binding energy is measured from their equilibrium thermodynamic properties.

Physical Review LettersApr 8, 201368 citations

Can the LiH molecule bind He atoms? A computational experiment

Franco Antonio Gianturco, Francesco Paesani, Roman Čurı́k +4 more

Chemical Physics LettersSep 1, 199910 citations

Direct Measurement of the van der Waals Interaction between two single Rydberg atoms

Henning Labuhn, Lucas Béguin, Aline Vernier +5 more

May 30, 20130 citations

Prediction of a weakly bound excited state of Efimov character in a Li7He24 system

M.-S. Wu, Hui-Li Han, Chengbin Li +1 more

Physical Review ADec 8, 201416 citations

First measurements of hollow lithium states produced by triple excitation of laser-excited lithium atoms

F. J. Wuilleumier, D. Cubaynes, S. Diehl +13 more

APSMay 1, 19960 citations

Physics

A Fragile Union Between Li and He Atoms

Břetislav Friedrich

Published Apr 8, 2013• 18 citations

Publisher

Abstract

The LiHe van der Waals molecule has been produced and spectroscopically detected and its binding energy found to only suffice to stabilize a single rotationless vibrational state.

DOI: 10.1103/physics.6.42

Related papers

Spectroscopic Detection of the Lithium Helium (LiHe) van der Waals Molecule

Al Taisan, Nada Ahmed

Jan 1, 20130 citations

Spectroscopic Detection of the LiHe Molecule

Naima Tariq, Nada Al Taisan, Vijay Singh +1 more

Physical Review LettersApr 8, 201368 citations

Can the LiH molecule bind He atoms? A computational experiment

Franco Antonio Gianturco, Francesco Paesani, Roman Čurı́k +4 more

Chemical Physics LettersSep 1, 199910 citations

Direct Measurement of the van der Waals Interaction between two single Rydberg atoms

Henning Labuhn, Lucas Béguin, Aline Vernier +5 more

May 30, 20130 citations

Prediction of a weakly bound excited state of Efimov character in a Li7He24 system

M.-S. Wu, Hui-Li Han, Chengbin Li +1 more

We carry out calculations on the van der Waals trimer $^{7}\mathrm{Li}^{4}\mathrm{He}_{2}$ using the mapping method within the frame of hyperspherical coordinates, which allows us to give accurate binding energies and wave functions for both the ground and excited state of the system. When the realistic two-body potentials are adopted, the system presents an excited state which shows Efimov character. We study the range of the interaction strength in which the excited state could exist and find that the state persists within the experiment error band for binding energy of LiHe molecule. We also study the three-body parameter (3BP) of $^{7}\mathrm{Li}^{4}\mathrm{He}_{2}$ system and its relationship with the background scattering length ${a}_{\text{HeHe}}$ . Our calculations demonstrate that the 3BP of $^{7}\mathrm{Li}^{4}\mathrm{He}_{2}$ system is dependent on the value of the scattering length ${a}_{\text{HeHe}}$ , independent of the short-range details of the He-He interaction. The results confirm the prediction of Wang et al. [Phys. Rev. Lett. 109, 243201 (2012)] that the 3BP for a heteronuclear atomic system is universally determined from the van der Waals lengths and the homonuclear scattering length.We carry out calculations on the van der Waals trimer $^{7}\mathrm{Li}^{4}\mathrm{He}_{2}$ using the mapping method within the frame of hyperspherical coordinates, which allows us to give accurate binding energies and wave functions for both the ground and excited state of the system. When the realistic two-body potentials are adopted, the system presents an excited state which shows Efimov character. We study the range of the interaction strength in which the excited state could exist and find that the state persists within the experiment error band for binding energy of LiHe molecule. We also study the three-body parameter (3BP) of $^{7}\mathrm{Li}^{4}\mathrm{He}_{2}$ system and its relationship with the background scattering length ${a}_{\text{HeHe}}$. Our calculations demonstrate that the 3BP of $^{7}\mathrm{Li}^{4}\mathrm{He}_{2}$ system is dependent on the value of the scattering length ${a}_{\text{HeHe}}$, independent of the short-range details of the He-He interaction. The results confirm the prediction of Wang et al. [Phys. Rev. Lett. 109, 243201 (2012)] that the 3BP for a heteronuclear atomic system is universally determined from the van der Waals lengths and the homonuclear scattering length.

Physical Review ADec 8, 201416 citations

First measurements of hollow lithium states produced by triple excitation of laser-excited lithium atoms

F. J. Wuilleumier, D. Cubaynes, S. Diehl +13 more

APSMay 1, 19960 citations

We carry out calculations on the van der Waals trimer

^{7}\mathrm{Li}^{4}\mathrm{He}_{2}

using the mapping method within the frame of hyperspherical coordinates, which allows us to give accurate binding energies and wave functions for both the ground and excited state of the system. When the realistic two-body potentials are adopted, the system presents an excited state which shows Efimov character. We study the range of the interaction strength in which the excited state could exist and find that the state persists within the experiment error band for binding energy of LiHe molecule. We also study the three-body parameter (3BP) of

^{7}\mathrm{Li}^{4}\mathrm{He}_{2}

system and its relationship with the background scattering length

{a}_{\text{HeHe}}

. Our calculations demonstrate that the 3BP of

^{7}\mathrm{Li}^{4}\mathrm{He}_{2}

system is dependent on the value of the scattering length

{a}_{\text{HeHe}}

, independent of the short-range details of the He-He interaction. The results confirm the prediction of Wang et al. [Phys. Rev. Lett. 109, 243201 (2012)] that the 3BP for a heteronuclear atomic system is universally determined from the van der Waals lengths and the homonuclear scattering length.