arXiv · 1911.05267
Compression-mode resonances in the calcium isotopes and implications for the asymmetry term in nuclear incompressibility
Abstract
Recent data on isoscalar giant monopole resonance (ISGMR) in the calcium isotopes $^{40,44,48}$Ca have suggested that $K_\tau$, the asymmetry term in the nuclear incompressibility, has a positive value. A value of $K_\tau > 0$ is entirely incompatible with present theoretical frameworks and, if correct, would have far-reaching implications on our understanding of myriad nuclear and astrophysical phenomena. This paper presents results of an independent ISGMR measurement with the $^{40,42,44,48}$Ca($\alpha,\alpha^\prime$) reaction at $E_\alpha = 386$ MeV. These results conclusively discount the possibility of a positive value for $K_\tau$, and are consistent with the previously-obtained values for this quantity.
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Kevin B. Howard, Umesh Garg, Masatoshi Itoh, Hidetoshi Akimune, Soumya Bagchi, Takanobu Doi, Yuki Fujikawa, Mamoru Fujiwara, Tatsuya Furuno, Muhsin N. Harakeh, Yuto Hijikata, Kento Inaba, Shunya Ishida, Nasser Kalantar-Nayestanaki, Takahiro Kawabata, Shoutaro Kawashima, Kazuya Kitamura, Nobuyuki Kobayashi, Yohei Matsuda, Anna Nakagawa, Shoken Nakamura, Kyoko Nosaka, Shintaro Okamoto, Shinsuke Ota, Sierra Weyhmiller, Zaihong Yang. 2019-11-13. Compression-mode resonances in the calcium isotopes and implications for the asymmetry term in nuclear incompressibility. https://arxiv.org/abs/1911.05267
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