Isospin Mixing in the Isobaric Analog State Derived from the ( p,nIASp ) Reaction on 140Ce , 172,174,176Yb , and 208Pb
Year: 1998
Type: article
Abstract: An exclusive coincidence experiment using the $({p,n}_{\mathrm{IAS}}\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{p})$ reaction on ${}^{140}\mathrm{Ce}$, ${}^{172,174,176}\mathrm{Yb}$, and ${}^{208}\mathrm{Pb}$ was carried out for the first time by measuring decay protons from the isobaric analog states (IAS). Spreading widths of the IAS are deduced from the escape and total widths. The results show a strong isospin dependence which can be explained by the isospin mixing effect due to the coupling to the ${T}_{0}$ component among three multiplets ${T\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}T}_{0}\ensuremath{-}1$, ${T}_{0}$, and ${T}_{0}+1$ of isovector monopole states in daughter nuclei. Empirical isospin mixing probabilities are found to be consistent with microscopic sum rule predictions.
Source: Physical Review Letters
Authors: H. Orihara, C. C. Yun, A. Terakawa, K. Itoh, A. Yamamoto, K. Kawami, H. Suzuki, Y. Mizuno, H. Kamurai, Y. Tajima, K. Ishii, Y. Fujii, H. Sagawa, T. Suzuki, H. Ohnuma
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W219202452