U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Eite Tiesinga (Fed)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 251 - 275 of 373

Purely-Long-Range Bound States of He (2s 3 S) + He(2p 3 P)

August 1, 2003
Author(s)
V Venturi, P J. Leo, Eite Tiesinga, Carl J. Williams, I B. Whittingham
We predict the presence and positions of purely-long-range bound states of 4He (2s3S) + 4He (2p3P) near the2s3S1 + 2p3P0, 1 atomic limits. The results of the full multichannel and approximate models are compared, and we assess the sensitivity of the bound

Two-Color Photoassociation Spectroscopy of the Lowest Triplet Potential of Na 2

July 1, 2003
Author(s)
L E. de Araujo, J D. Weinstein, S D. Gensemer, F K. Fatemi, Kevin Jones, Paul D. Lett, Eite Tiesinga
We have performed a type of Autler-Townes spectroscopy to locate a number of rovibrational hyperfine levels of the a ^3^ς + u potential, the lowest triplet potential of the Na 2 dimer. The spectroscopy starts with the photoassociation of ultracold atoms in

Ultracold Collision Properties of Metastable Alkaline-Earth Atoms

February 1, 2003
Author(s)
A Derevianko, S. G. Porsev, Svetlana A. Kotochigova, Eite Tiesinga, Paul S. Julienne
Ultra-cold collisions of spin-polarized Mg, Ca, and Sr in the metastable 3P2 excited state are investigated. We show the existence of purely long-range potentials, determine the scattering length, and estimate the collisional loss rate as a function of

Intensity Effects in Ultracold Photoassociation Line Shapes

December 1, 2002
Author(s)
A Simoni, Paul S. Julienne, Eite Tiesinga, Carl J. Williams
We derive ultracold atom-atom photoassociation line shapes valid for intense light fields and investigate laser power effects in sodium and rubidium photoassociation to the purely long range 0g- symmetry state. We consider intensities up to few hundreds W

Ultracold Ground-State Molecule Production in Sodium

November 1, 2002
Author(s)
F K. Fatemi, Kevin Jones, Paul D. Lett, Eite Tiesinga
We have observed the formation of ground state Na 2 molecules via the spontaneous decay of excited molecules created by the photoassociation of ultracold atoms. We measure the energies of ground state molecules formed in three hyperfine components of the

Measurement of the Zero Crossing in a Feshbach Resonance of Fermionic 6 Li

October 1, 2002
Author(s)
K M. O'Hara, S L. Hemmer, M E. Granade, M E. Gehm, J E. Thomas, V Venturi, Eite Tiesinga, Carl J. Williams
We measure a zero crossing in the scattering length of a mixture of the two lowest hyperfine states of 6Li. To locate the zero crossing, we monitor the decrease in temperature and atom number arising from evaporation in a CO2 laser trap as a function of