Rotationally resolved depletion spectroscopy of ultracold KRb molecules
- Physics Department, University of Connecticut, Storrs, Connecticut 06269 (United States)
We report on the use of depletion spectroscopy to detect ultracold ground-state KRb molecules with rotational resolution. The population of a specific ground-state vibrational level v{sup }, produced by photoassociation of ultracold atoms, is monitored by one-color two-photon pulsed-laser ionization. When a cw laser is resonant with a rovibrational transition to an excited state, the ground-state population, and hence the ion signal, is depleted. This narrow-band spectroscopic technique allows the individual rotational levels in both ground and excited states to be resolved, and thus the population of a single ground-state rovibrational level to be monitored. These resolved transitions are a necessary first step in transferring population from high vibrational levels of the ground state, such as produced by photoassociation, to the absolute molecular ground state X {sup 1}{sigma}{sup +} (v{sup }=0, J{sup }=0). This technique can also be used to determine binding energies of high-v{sup } molecules. Combining our binding energy measurement with the results of previous spectroscopy yields an improved dissociation energy of the X state: D{sub e}=4217.822{+-}0.003 cm{sup -1}. We also report on the two-color pulsed-laser ionization used to locate the depletion transitions.
- OSTI ID:
- 20982308
- Journal Information:
- Physical Review. A, Vol. 75, Issue 3; Other Information: DOI: 10.1103/PhysRevA.75.032511; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ATOMS
BINDING ENERGY
COLOR
DISSOCIATION
DISSOCIATION ENERGY
GROUND STATES
IONS
MOLECULES
PHOTOIONIZATION
PHOTOLYSIS
PHOTON-MOLECULE COLLISIONS
PHOTONS
POTASSIUM COMPOUNDS
RESOLUTION
ROTATIONAL STATES
RUBIDIUM COMPOUNDS
SPECTRA
SPECTROSCOPY
TEMPERATURE RANGE 0000-0013 K
VIBRATIONAL STATES