H. Poth

Remeasurement of the magnetic moment of the antiproton

AbstractA high-precision measurement of the finestructure splitting in the circular 11→10 X-ray transition of

Further results and evaluation of electron cooling experiments at LEAR

\bar p^{208} Pb

Positron accumulation and storage for antihydrogen production

was performed. The experimental value of 1199(5) eV is in agreement with QED calculations. From that value the magnetic moment of the antiproton was deduced to be −2.8005(90)μnucl. With this result the uncertainty of the previous world average value was reduced by a factor of ≈2. A comparison with the corresponding quantity of the proton now yields:

Measurement of the 4f strong interaction level width in light antiprotonic atoms

{{\left( {\mu _p - \left| {\left\langle {\mu _{\bar p} } \right\rangle } \right|} \right)} \mathord{\left/ {\vphantom {{\left( {\mu _p - \left| {\left\langle {\mu _{\bar p} } \right\rangle } \right|} \right)} {\mu _p }}} \right. \kern-\nulldelimiterspace} {\mu _p }} = \left( { - 2.4 \pm 2.9} \right) \times 10^{ - 3}

An alternative concept for high-voltage systems used in electron cooling

.

Strong-interaction fine structure effects in antiprotonic148Nd

Abstract New data on strong interaction effects in light antiprotonic atoms (N, 16 O, 18 O, S) are presented. For the first time an isotope effect could be observed in p- 16 O/ 18 O which is used to gain new information about the p-n interaction in nuclei. A comparison between all existing p-atomic data and an optical model calculation is performed, yielding a set of fit parameters for the potential.