Sympathetic cooling of fluorine atoms with ultracold atomic hydrogen

González-Martínez, Maykel L.; Hutson, Jeremy M.

doi:10.1103/physreva.88.053420

Cited by 18 publications

(35 citation statements)

References 57 publications

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“…Shortening the molecular beam pulse will enable a reduction in the collisions that contribute to trap loss and thus a genuine accumulation of signal over multiple pulses. Increasing the phase space density by sympathetic cooling with ultracold H atoms may be a possibility, as suggested recently by calculations for F atoms [22].…”

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confidence: 82%

Magnetic Trapping of Cold Bromine Atoms

et al. 2014

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Magnetic trapping of bromine atoms at temperatures in the millikelvin regime is demonstrated for the first time. The atoms are produced by photodissociation of Br2 molecules in a molecular beam. The lab-frame velocity of Br atoms is controlled by the wavelength and polarization of the photodissociation laser. Careful selection of the wavelength results in one of the pair of atoms having sufficient velocity to exactly cancel that of the parent molecule, and it remains stationary in the lab frame. A trap is formed at the null point between two opposing neodymium permanent magnets. Dissociation of molecules at the field minimum results in the slowest fraction of photofragments remaining trapped. After the ballistic escape of the fastest atoms, the trapped slow atoms are lost only by elastic collisions with the chamber background gas. The measured loss rate is consistent with estimates of the total cross section for only those collisions transferring sufficient kinetic energy to overcome the trapping potential.

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confidence: 82%

Magnetic Trapping of Cold Bromine Atoms

et al. 2014

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“…Ref. [54]). Quantum states are calculated from the diagonalization of the resulting Hamiltonian matrix for a specific value of the external fields, using NIST recommended parameters [36].…”

Section: Quantum Statesmentioning

confidence: 99%

Statistical product distributions for ultracold reactions in external fields

et al. 2014

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The main limitation of most ultracold chemistry studies to date is the lack of an analysis of reaction products. Here, we discuss a generally tractable, rigorous theoretical framework for computing statistical product-state distributions for ultracold reactions in external fields. We show that fields have two main effects on the products of a statistical reaction, by (1) modifying the product energy levels and thus potentially reshaping the product distributions and/or (2) adding or removing product states by changing the reaction exothermicity. By analyzing these effects and the strength of the formalism to distinguish between different reaction mechanisms in benchmark reactions involving 40 K and 87 Rb species, we argue that statistical predictions will help understanding product formation and control, and lead developments to realize the full potential of ultracold chemistry.

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“…These properties enable new exciting applications and experiments, such as precise measurements of fundamental physical constants [1,2] or simulations of spin models in optical lattices [3,4] . The replacement of the Ake by Yb leads to a class of molecules with similar features which have been studied theoretically [5–10] as well as experimentally in combined traps of ultracold Ak and Yb atoms [11–14] . Ake monohalides, such as CaF or SrF [15–18] , also possess a magnetic and permanent electric dipole moment in their

ground state.…”

Section: Introductionmentioning

confidence: 99%