Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Hyperfine Interactions

Antihydrogen at sub-Kelvin temperatures

Georgy V. Shlyapnikov, Jook T. M. Walraven, E.L. Surkov

Published Dec 1, 1993• 27 citations
Publisher
DOI
10.1007/bf02316704

Related papers

Antiproton-Hydrogen and Antihydrogen-Hydrogen annihilation at sub-kelvin temperatures

Alexei Yu. Voronin, Jaume Carbonell

Few-body systems. Supplementum•Jan 1, 1999•1 citation

Observations of Cold Antihydrogen

G. Gabrielse

International Conference on Atomic Physics (ICAP)•Apr 1, 2003•0 citations

Observations of cold antihydrogen

Jun Tan, N. S. Bowden, G. Gabrielse +12 more

Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms•Jul 31, 2003•5 citations

Radiative association of atomic hydrogen with antihydrogen at subkelvin temperatures

Bernard Zygelman, Alejandro Sáenz, Piotr Froelich +2 more

Partial and total cross sections for the radiative association process $\mathrm{H}+\mathrm{H}\stackrel{\ensuremath{\rightarrow}}{\ifmmode\bar\else\textasciimacron\fi{}}\mathrm{H}\mathrm{H}\ifmmode\bar\else\textasciimacron\fi{}+h\ensuremath{\nu}$ in the sub-Kelvin temperature regime are reported. We calculate the emission spectra for this process and suggest its utility as a diagnostic. The cross section for radiative association is found to have the value $\ensuremath{\sigma}=6.85\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}22} {\mathrm{cm}}^{2}/\sqrt{T}$, where T is an effective temperature. It is significantly smaller than the in-flight annihilation and fragmentation cross sections. We discuss the role that radiative association plays in the formation of a quasibound system of the $\mathrm{H}\mathrm{H}\ifmmode\bar\else\textasciimacron\fi{}$ molecule.

Physical Review A•Apr 19, 2001•28 citations

Cold antihydrogen atoms

J. Walz, H. Pittner, M. G. Herrmann +3 more

Applied Physics B•Dec 1, 2003•5 citations

A novel cooling scheme for antiprotons

A. Kellerbauer, J. Walz

We propose a novel technique which uses laser-cooled negative osmium ions for sympathetic cooling of antiprotons. Temperatures down to the sub-millikelvin range might be achievable. These antiprotons could be used to form antihydrogen at ultra-cold temperatures, thus allowing efficient magnetic trapping of antihydrogen for high-resolution laser spectroscopy. Antihydrogen at sub-millikelvin temperatures might also enable first direct measurements of the gravitational acceleration of antimatter. Currently, no other technique exists which allows the cooling of large numbers of antiprotons to temperatures below that of the surrounding trap.

New Journal of Physics•Mar 29, 2006•66 citations
Partial and total cross sections for the radiative association process $\mathrm{H}+\mathrm{H}\stackrel{\ensuremath{\rightarrow}}{\ifmmode\bar\else\textasciimacron\fi{}}\mathrm{H}\mathrm{H}\ifmmode\bar\else\textasciimacron\fi{}+h\ensuremath{\nu}$ in the sub-Kelvin temperature regime are reported. We calculate the emission spectra for this process and suggest its utility as a diagnostic. The cross section for radiative association is found to have the value $\ensuremath{\sigma}=6.85\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}22} {\mathrm{cm}}^{2}/\sqrt{T}$, where T is an effective temperature. It is significantly smaller than the in-flight annihilation and fragmentation cross sections. We discuss the role that radiative association plays in the formation of a quasibound system of the $\mathrm{H}\mathrm{H}\ifmmode\bar\else\textasciimacron\fi{}$ molecule.
We propose a novel technique which uses laser-cooled negative osmium ions for sympathetic cooling of antiprotons. Temperatures down to the sub-millikelvin range might be achievable. These antiprotons could be used to form antihydrogen at ultra-cold temperatures, thus allowing efficient magnetic trapping of antihydrogen for high-resolution laser spectroscopy. Antihydrogen at sub-millikelvin temperatures might also enable first direct measurements of the gravitational acceleration of antimatter. Currently, no other technique exists which allows the cooling of large numbers of antiprotons to temperatures below that of the surrounding trap.