The Isoscalar Giant Dipole Resonance in 208Pb and the Nuclear incompressibility
M. Hedden, U. Garg, B. Kharraja, S. Zhu, M. Uchida, H. Sakaguchi, T. Murakami, M. Yosoi, H. Takeda, M. Itoh, T. Kawabata, T. Taki, T. Ishikawa, N. Tsukuhara, Y. Yasuda, M. Fujiwara, H. Fujimura, H. P. Yoshida, E. Obayashi, K. Hara, H. Akimune, M. N. Harakeh, M. Volkerts
Abstract
The isoscalar giant dipole resonance (ISGDR) has been investigated in 208Pb using inelastic scattering of 400 MeV alpha particles at forward angles, including 0deg. Using the superior capabilities of the Grand Raiden spectrometer, it has been possible to obtain spectra devoid of any "instrumental" background. The ISGDR strength distribution has been extracted from a multipole-composition of the observed spectra. The implication of these results on the experimental value of nuclear incompressibility are discussed.
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