Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Physical Chemistry Chemical Physics

Hyperfine structure of the NaCs b 3 Π 2 state near the dissociation limit 3S 1/2 + 6P 3/2 observed with ultracold atomic photoassociation

Xiaofeng Wang, Wenliang Liu, Yuqing Li, Jizhou Wu, V. B. Sovkov, Jie Ma, Sofiia S. Onishchenko, Peng Li, Yongming Fu, Dan Li, Qunchao Fan, Liantuan Xiao, Suotang Jia

Published Dec 10, 2019• 9 citations
Publisher

Abstract

The hyperfine structure of the ultracold NaCs molecular b 3 Π 2 state is studied experimentally and theoretically.
DOI
10.1039/c9cp05870b

Related papers

Photoassociation spectroscopy of the A1Σ – b3Π complex in ultracold polar NaCs molecules

Marek Haruza, Patrick Zabawa, Amy Wakim +1 more

We present our investigation of photoassociation channels associated with the A1Σ and b3Π electronic states of NaCs including hyperfine structure of high lying levels. We calculate dispersion coefficients and determine a new b3ΠΩ=2 PEC.

Frontiers in Optics•Jan 1, 2012•1 citation

Observation and analysis of the hyperfine structure of near-dissociation levels of the NaCs cΣ+3 state below the dissociation limit 3S1/2+6P3/2

Wenliang Liu, Jizhou Wu, Jie Ma +4 more

We report photoassociation (PA) of ultracold Na and Cs atoms in a dual-species magneto-optical trap. Trap loss spectroscopy of the ultracold polar NaCs molecules formed by PA, which carries information about relative PA transition strengths, has been experimentally obtained by using highly sensitive modulation spectroscopy technique. The fine and hyperfine effects at near-dissociation levels of NaCs molecular $c\phantom{\rule{0.16em}{0ex}}^{3}\mathrm{\ensuremath{\Sigma}}^{+}$ state are observed and modeled. The interaction Hamiltonian is described in terms of the Hund's case ($a$) coupling scheme. The molecular hyperfine structure of near-dissociation levels is simulated within a simplified model of four interacting vibrational levels belonging to different initially unperturbed electronic states. The results of the simulation infer that the interaction parameters of the observed near-dissociation levels are close to the asymptotic parameters of the pair of atoms. The coupling of the electronic states is essential for forming the hyperfine structure.

Physical Review A•Sep 30, 2016•22 citations

Processes in the formation of ultracold NaCs

Christopher Haimberger, Jan Kleinert, Olivier Dulieu +1 more

The formation of electronic ground-state NaCs molecules from ultracold atoms by photoassociation is explored both experimentally and theoretically. We observe saturation of the photoassociation process as well as complete ionization of the molecular sample by resonant two-photon absorption. Measured absolute molecule formation rates are compared to theoretical calculations and shown to be in good agreement.

Journal of Physics B Atomic Molecular and Optical Physics•Sep 25, 2006•37 citations

Spectroscopy of Na2 by photoassociation of laser-cooled Na

Paul D. Lett, Kristian Helmerson, William D. Phillips +3 more

We have observed the spectrum of long range molecular states of singly excited ${\mathrm{Na}}_{2}$ formed by photoassociation during ultracold associative ionization collisions of laser-cooled Na atoms. The low kinetic energy of the collision allows us to obtain very high resolution spectra and to observe states close to the dissociation limit. The spectrum shows regular vibrational series characteristic of the 1/${\mathit{R}}^{3}$ long range portion of the ${1}_{\mathit{g}}$ potential (asymptotically ${\mathit{S}}_{1/2}$+${\mathit{P}}_{3/2}$) as well as molecular hyperfine structure within these peaks. We extract potential parameters and compare with recent theory.

Physical Review Letters•Oct 4, 1993•227 citations

Molecular hyperfine structure in the photoassociation spectroscopy of laser cooled atoms

Carl J. Williams, Paul S. Julienne

The photoassociation of colliding ultracold trapped atoms permits the observation of high resolution molecular spectra of high lying vibrational levels with low total angular momentum and outer turning points greater than 50 Å. This paper describes how the hyperfine structure of alkali dimer molecules at large internuclear separation can be used to assign the electronic character of the observed photoassociation spectra and how hyperfine structure helps to explain the observed photoassociation spectrum of the attractive electronic states of the Na2 molecule that correlate with Na(3 2S)+Na(3 2P3/2) atoms.

The Journal of Chemical Physics•Aug 1, 1994•54 citations

Controlled Formation of Ultracold NaCs Molecules by Photoassociation via Adiabatic Passage

Xuan Li

We investigate the formation of ultracold NaCs molecules by photoassociation of Na and Cs atoms.

arXiv:1007.4795•Jul 27, 2010•1 citation
We report photoassociation (PA) of ultracold Na and Cs atoms in a dual-species magneto-optical trap. Trap loss spectroscopy of the ultracold polar NaCs molecules formed by PA, which carries information about relative PA transition strengths, has been experimentally obtained by using highly sensitive modulation spectroscopy technique. The fine and hyperfine effects at near-dissociation levels of NaCs molecular $c\phantom{\rule{0.16em}{0ex}}^{3}\mathrm{\ensuremath{\Sigma}}^{+}$ state are observed and modeled. The interaction Hamiltonian is described in terms of the Hund's case (aaa) coupling scheme. The molecular hyperfine structure of near-dissociation levels is simulated within a simplified model of four interacting vibrational levels belonging to different initially unperturbed electronic states. The results of the simulation infer that the interaction parameters of the observed near-dissociation levels are close to the asymptotic parameters of the pair of atoms. The coupling of the electronic states is essential for forming the hyperfine structure.
We have observed the spectrum of long range molecular states of singly excited Na2{\mathrm{Na}}_{2}Na2​ formed by photoassociation during ultracold associative ionization collisions of laser-cooled Na atoms. The low kinetic energy of the collision allows us to obtain very high resolution spectra and to observe states close to the dissociation limit. The spectrum shows regular vibrational series characteristic of the 1/R3{\mathit{R}}^{3}R3 long range portion of the 1g{1}_{\mathit{g}}1g​ potential (asymptotically S1/2{\mathit{S}}_{1/2}S1/2​+P3/2{\mathit{P}}_{3/2}P3/2​) as well as molecular hyperfine structure within these peaks. We extract potential parameters and compare with recent theory.
The photoassociation of colliding ultracold trapped atoms permits the observation of high resolution molecular spectra of high lying vibrational levels with low total angular momentum and outer turning points greater than 50 Å. This paper describes how the hyperfine structure of alkali dimer molecules at large internuclear separation can be used to assign the electronic character of the observed photoassociation spectra and how hyperfine structure helps to explain the observed photoassociation spectrum of the attractive electronic states of the Na2 molecule that correlate with Na(3 2S)+Na(3 2P3/2) atoms.