Hans von der Schmitt

Pionic 2p - 1s Transitions

Abstract Pionic 2p-1s transitions from Be, 10B, C, N, 16O, 18O, F and Na have been measured with the Ge counters. Data for 1s level shifts and widths are given. No lines were found for Mg and Al.

Fermi matrix elements in allowed beta decay

Abstract All measured Fermi matrix elements of normal allowed β decay are compiled. For each case an adopted value is given which is the mean over all consistent results. The Fermi matrix elements turn out to be small or vanishing, in fair agreement with the isospin selection rule. The question of charge dependence of the nuclear forces is discussed.

Nuclear radii of light nuclei from muonic X-ray measurements

Abstract Measurements of the muonic 2p-1s transition energies in nuclei with Z ⩽ 17 are reported. Nuclear charge radii are deduced and compared with data from electron scattering.

Pionic 2p level widths in light nuclei

Abstract The yields of muonic and pionic 2p-1s X-ray transitions are given for Be, 10 B. nat B and C. Pionic 2p populations are calculated, and the natural widths of the pionic 2p levels from Be to Na are deduced by comparison with X-ray transition rates calculated with realistic pion wave functions.

Intensities of mesonic 2p - 1s X-rays in N, 16O, 18O, F, and Na

Abstract The yields of pionic and muonic 2p-1s X-rays are given for N, 16 O, 18 O, F, and Na. The populations of the pionic 2p levels are determined and the natural widths are deduced.

Determination of semi-muonic branching ratios and fragmentation functions of heavy quarks ine+e− annihilation at\(\langle \sqrt s \rangle \)=34.6 GeV

AbstractMuon inclusive multihadronic final states ine+e− annihilation at

β-γ-zirkularpolarisations-korrelation des Sc46 und chemische form der quelle

\langle \sqrt s \rangle

π-mesic 4f-3d and 5g-4f X-ray

=34.6 GeV, collected by the JADE detector at PETRA, have been analysed in terms of the semi-muonic branching ratios and fragmentation functions of heavy quarks. Defining the fragmentation variable, ζ, as