ISSN:
1432-0649
Keywords:
32.80.Pj
;
05.70.Fh
;
34.40.+n
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Be+ ions stored in a Penning trap were cooled by a laser beam perpendicular to the magnetic field. The cooled ions are strongly coupled and phase transitions of up to 100 ions were observed. In experiments with only a few ions stored in the trap, a stepwise decrease in fluorescence intensity was observed. All steps are of the same size and so every step is attributed to a single ion. The discrete changes in fluorescence occurred more frequently when the background pressure was increased, caused by collisions between stored ions and background neutral molecules.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00425998
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