The study of quadrupole hyperfine interactions in pionic atoms of¹⁸¹Ta and¹⁶⁵Ho

Conclusion

In Table 3 we have listed the Q values of¹⁶⁵Ho and¹⁸¹Ta obtained by the pionic methods from this experiment and the one from Ebersoldet. al. and also the results by the muonic methods.^{4, 5} They are all in good agreements within the experimental uncertainties around 1%. The large discrepency between the Q values of¹⁸¹Ta from Ref. 5 and Ref. 7 was discussed and explained in detail in Ref. 5.

The ε_o obtained in¹⁶⁵Ho is comparable to the ε_o calculated by using the Kisslinger's potential. However, the experimental ε_o for¹⁸¹Ta from this experiment is 28% larger than the theoretical value by Scheck³ by using the perturbation method.

As it was mentioned at the beginning of this paper that the strong interaction quadrupole effect introduces characteristic level broadening to each components of the multiplet. The excellent fit between the calculated composite curve with the observed experimental h.f.s. spectra could be obtained only by varying all three independent parameters Q_eff, ε_o and Γ_o. Without Γ_o, or Γ₂, no satisfactory fitting could be obtained. That this illustrates the intrigue strong quadrupole effects on each components of a multiplet do behave as predicted by Scheck.³