Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apr.u4004z&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
With the CERN anti-proton decelerator now on line, it is anticipated that antihydrogen \overlineH atoms will be created, cooled and stored in large numbers. It has recently been proposed that the introduction of cold, spin-polarized, hydrogen atoms into a gas of trapped antihhydrogen could allow sympathetic cooling of the antihydrogen into the sub-Kelvin regime. In this talk we will present the results of calculations that estimate the rate of elastic scattering of H with \overlineH, and compare that to the rate in the which fragmentation reaction, H +\overline H arrow p \overline p +e^- e^+ occurs and limits the utility of sympathetic cooling. Unlike the ground state of the H2 system, the H \overline H system possesses a non-vanishing dipole that allows for the additional inelastic reaction H+\overline H arrow H \overline H^* + hν , where H \overline H^* is a quasi-bound state of the hydrogen-antihydrogen complex. The rate for radiative association into quasi-bound states of the H \overline H^* complex will be presented and we will estimate the lifetimes of the quasi-bound H \overline H^* system.
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