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- W1505091167 endingPage "217" @default.
- W1505091167 startingPage "155" @default.
- W1505091167 abstract "An antihydrogen (H¯) atom—a positron (e+) in orbit about an antiproton (p¯)—is the simplest atom made entirely of antimatter. Producing H¯ atoms that are cold enough to be trapped for precise laser spectroscopy, to compare antihydrogen and hydrogen, is a goal that has been pursued for many years. A prequel to this review summarized the techniques for accumulating cold p¯ and e+ that opened the way to slow H¯ production, along with crucial devices like the nested Penning trap that was developed to bring the p¯ and e+ together. Several exciting years have seen the first production, observations and studies of slow H¯ atoms—so far by two different methods. The demonstrations of e+ cooling of p¯ in a nested Penning trap led to observations of slow H¯ atoms produced in this way (method I) using two detection techniques. Field ionization detection of H¯ produced by method I makes it possible to go beyond the simple counting of H¯ atoms via charge exchange collisions—a method that seems to naturally produce H¯ atoms with essentially the low energy distribution of the p¯ from which they form." @default.
- W1505091167 created "2016-06-24" @default.
- W1505091167 creator A5041861669 @default.
- W1505091167 date "2005-01-01" @default.
- W1505091167 modified "2023-09-23" @default.
- W1505091167 title "Atoms made entirely of antimatter: Two methods produce slow antihydrogen" @default.
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