Person: Hancox, Cindy
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Hancox
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Cindy
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Hancox, Cindy
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Publication Evaporative cooling of atomic chromium(American Physical Society (APS), 2002) Weinstein, Jonathan D.; deCarvalho, Robert; Hancox, Cindy; Doyle, JohnWe report the magnetic trapping and evaporative cooling of bosonic and fermionic isotopes of atomic chromium. Using a cryogenic helium buffer gas, 10^12 chromium atoms are trapped at an initial temperature of ~1 K. The chromium atoms are then cooled adiabatically and evaporatively to temperatures as low as ~10 mK. Elastic and inelastic ^52Cr collisional cross sections are measured over this temperature range. Prospects for simultaneously creating a ^52Cr Bose-Einstein condensate and ^53Cr Fermi degenerate gas will be discussed.Publication Evaporative cooling of magnetically trapped atomic molybdenum(American Physical Society (APS), 2005) Hancox, Cindy; Hummon, Matthew T.; Nguyen, Scott V.; Doyle, JohnWe have magnetically trapped and evaporatively cooled atomic molybdenum. Using a cryogenic helium buffer gas, 2×10^10 molybdenum atoms are loaded into a magnetic trap at an initial temperature of 500 mK. We measure a molybdenum inelastic rate constant of gin = (1.2±0.6)×10^−12cm^3s^ −1 for the initial conditions after loading. The molybdenum atoms are cooled by adiabatic expansion and forced evaporation to 200 mK.Publication Suppression of Angular Momentum Transfer in Cold Collisions of Transition Metal Atoms in Ground States with Nonzero Orbital Angular Momentum(American Physical Society (APS), 2005) Hancox, Cindy; Doret, S. Charles; Hummon, Matthew T.; Krems, Roman V.; Doyle, JohnThe Zeeman relaxation rate in cold collisions of Ti 3d(^2)4s(^2)(^3)3F2 with He is measured. We find that collisional transfer of angular momentum is dramatically suppressed due to the presence of the filled 4s^2 shell. The degree of electronic interaction anisotropy, which is responsible for Zeeman relaxation, is estimated to be about 200 times smaller in the Ti-He complex than in He complexes with typical non-S-state atoms.