Singlets-wave scattering lengths ofLi6andLi7
| Autor: | Randall G. Hulet, Eric Abraham, Alexander Dalgarno, W. I. McAlexander, Robin Côté, Jordan M. Gerton |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Phonon scattering Scattering Isotopes of lithium Scattering length Atomic and Molecular Physics and Optics Scattering amplitude Excited state Physics::Atomic and Molecular Clusters Physics::Atomic Physics Sensitivity (control systems) Atomic physics Hyperfine structure |
| Zdroj: | Physical Review A. 53:R3713-R3715 |
| ISSN: | 1094-1622 1050-2947 |
| DOI: | 10.1103/physreva.53.r3713 |
| Popis: | Photoassociation of ultracold lithium atoms into bound vibrational levels of the $A^{1}\ensuremath{\Sigma}_{u}^{+}$ excited state is used to probe the $X^{1}\ensuremath{\Sigma}_{g}^{+}$ ground-state interaction potential of $^{6}\mathrm{Li}_{2}$ and $^{7}\mathrm{Li}_{2}$. It had been predicted that the $s$-wave photoassociation signal strength would pass through a minimum as a function of vibrational level for positive $s$-wave scattering length. We report the observation of this novel effect, and use the location of the minimum to precisely determine the singlet $s$-wave scattering length for both isotopes. The sensitivity of this technique is demonstrated by distinguishing the minima for collisions involving $^{7}\mathrm{Li}$ atoms in different hyperfine states. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|