Strong interaction effect measurements in Sigma hyperonic atoms of W and Pb
1993
11 pages
Published in:
- Phys.Rev.C 47 (1993) 1263-1273
Experiments:
Citations per year
Abstract: (APS)
Strong-interaction effects have been observed in the x-ray spectra of atoms formed with Σ− hyperons in W and Pb. The spectra were analyzed for energy shifts and broadenings and for yield reductions of the final x-ray transitions before absorption of the Σ− by the nucleus. The results for the 10l→9k transitions of Σ− hyperonic atoms averaged over fine structure components are W184: ɛ(9k)=214±60 eV, Γ(9k)=18±149 eV, Γ(10l)=2±2 eV; Pb208: ɛ(9k)=422±56 eV, Γ(9k)=428±158 eV, Γ(10l)=17±3 eV, where the strong interaction shift ɛ=Em-Ec, Em is the measured transition energy, and Ec is the transition energy calculated assuming no strong interaction and Γ is the Lorentzian broadening. A four-parameter optical potential representing an effective spin-independent Σ−-nuclear hadronic interaction was fitted by these results in combination with previous data from lower-Z nuclei.- atom: hyperonic atom
- Sigma: hyperonic atom
- tungsten: hyperonic atom
- lead: hyperonic atom
- effect: strong interaction
- strong interaction: effect
- energy levels: hyperonic atom
- fine structure: hyperonic atom
- Sigma: binding energy
- Sigma nucleus: scattering length
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