Evidence of a Pionic Enhancement Observed in ¹⁶O(p,p') ¹⁶O(0-,T=1) at 295 MeV
Wakasa, T. · Berg, G. P. A. · Fujimura, H. · Fujita, K. · Hatanaka, K. · Ichimura, M. · Itoh, M. · Kamiya, J. · Kawabata, T. · Kitamura, Y. · Obayashi, E. · Sakaguchi, H. · Sakamoto, N. · Sakemi, Y. · Shimizu, Y. · Takeda, H. · Uchida, M. · Yasuda, Y. · Yoshida, H. P. · Yosoi, M.
Original · EN
The cross section of the ¹⁶ O(p,p')¹⁶ O(0-,T=1) scattering was measured at a bombarding energy of 295 MeV in the momentum transfer range of 1.0 fm⁻¹ ≤ q c.m. ≤ 2.1 fm⁻¹. The isovector 0- state at Eₓ = 12.8 MeV is clearly separated from its neighboring states owing to the high energy resolution of about 30 keV. The cross section data were compared with distorted wave impulse approximation (DWIA) calculations employing shell-model wave functions. The observed cross sections around q c.m. ≃ 1.7 fm⁻¹ are significantly larger than predicted by these calculations, suggesting pionic enhancement as a precursor of pion condensation in nuclei. The data are successfully reproduced by DWIA calculations using random phase approximation response functions including the Δ isobar that predict pionic enhancement.
English translation
This paper has no Arabic translation yet. Be the first: it takes a few seconds, and the result is stored for every future reader.