Experiments with Atomic Hydrogen in a Magnetic Trapping Field

Roijen, R. van; Berkhout, J.J.; Jaakkola, S.; Walraven, J.T.M.

doi:10.1103/physrevlett.61.931

Cited by 120 publications

(64 citation statements)

References 19 publications

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“…Nevertheless, magnetically trapped hydrogen atoms in state H d have been produced at temperatures of 40 to 100 mK and densities up to 3 × 10 14 cm −3 by purely cryogenic methods [47,48] and then evaporatively cooled to produce a BEC of 10 9 atoms at a temperature of around 50 μK and densities between 10 14 and 5 × 10 15 cm −3 [49]. In addition, Zeeman deceleration and magnetic trapping of hydrogen have recently been demonstrated [50][51][52][53], although at higher temperatures and lower number densities.…”

Section: A Atomic Hyperfine and Zeeman Levelsmentioning

confidence: 99%

Sympathetic cooling of fluorine atoms with ultracold atomic hydrogen

González-Martínez

Hutson²

2013

Phys. Rev. A

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The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. We consider the prospect of using ultracold hydrogen atoms for sympathetic cooling of fluorine atoms to microkelvin temperatures. We carry out quantum-mechanical calculations on collisions between cold F and H atoms in magnetically trappable states and show that the ratio of elastic to inelastic cross sections remains high across a wide range of temperatures and magnetic fields. For F atoms initially in the spin-stretched state ( 2 P 3/2 , f = m f = +2), sympathetic cooling appears likely to succeed from starting temperatures around 1 K or even higher. This occurs because inelastic collisions are suppressed by p-wave and d-wave barriers that are 600 mK and 3.2 K high, respectively. In combination with recent results on H + NH and H + OH collisions [M. L. González-Martínez and J. M. Hutson, Phys. Rev. Lett. 111, 203004 (2013)], this establishes ultracold H atoms as a very promising and versatile coolant for atoms and molecules that cannot be laser-cooled.

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Section: A Atomic Hyperfine and Zeeman Levelsmentioning

confidence: 99%

Sympathetic cooling of fluorine atoms with ultracold atomic hydrogen

González-Martínez

Hutson²

2013

Phys. Rev. A

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“…A revision of the calculated value for g would cause a proportional change in the value of χ. Experiments have verified this decay constant at the 20% level [21], but since the calculation involves well known ground state potentials, the calculated value is expected to be more certain.…”

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confidence: 99%

Cold Collision Frequency Shift of the1S-2STransition in Hydrogen

et al. 1998

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We have observed the cold collision frequency shift of the 1S-2S transition in trapped spin-polarized atomic hydrogen. We find ∆ν 1S−2S = −3.8 ± 0.8 × 10 −10 n Hz cm 3 , where n is the sample density. From this we derive the 1S-2S s-wave triplet scattering length, a 1S−2S = −1.4 ± 0.3 nm, which is in fair agreement with a recent calculation. The shift provides a valuable probe of the distribution of densities in a trapped sample.

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“…[12,13] and originally used for trapping hydrogen [14,15] and sodium [16] in cryogenic traps. In contrast, our trap is built with normal electromagnets.…”

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confidence: 99%

Bose-Einstein Condensation in a Tightly Confining dc Magnetic Trap

et al. 1996

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General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible.Download date: 24 Mar 2019 VOLUME 77, NUMBER 3 Bose-Einstein condensation of sodium atoms has been observed in a novel "cloverleaf" trap. This trap combines tight confinement with excellent optical access, using only dc electromagnets. Evaporative cooling in this trap produced condensates of 5 3 10 6 atoms, a tenfold improvement over previous results. We measured the condensate fraction and the repulsive mean-field energy, finding agreement with theoretical predictions. [S0031-9007(96) P H Y S I C A L R E V I E W L E T T E R S 15 JULY 1996 Bose-Einstein Condensation in a Tightly Confining dc Magnetic Trap

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Experiments with Atomic Hydrogen in a Magnetic Trapping Field

Cited by 120 publications

References 19 publications

Sympathetic cooling of fluorine atoms with ultracold atomic hydrogen

Sympathetic cooling of fluorine atoms with ultracold atomic hydrogen

Cold Collision Frequency Shift of the1S-2STransition in Hydrogen

Bose-Einstein Condensation in a Tightly Confining dc Magnetic Trap

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