Compression-mode resonances in the calcium isotopes and implications for the asymmetry term in nuclear incompressibility

K. B. Howard, U. Garg, M. Itoh, H. Akimune, S. Bagchi, T. Doi, Y. Fujikawa, M. Fujiwara, T. Furuno, M. N. Harakeh, Y. Hijikata, K. Inaba, S. Ishida, N. Kalantar-Nayestanaki, T. Kawabata, S. Kawashima, K. Kitamura, N. Kobayashi, Y. Matsuda, A. NakagawaS. Nakamura, K. Nosaka, S. Okamoto, S. Ota, S. Weyhmiller, Z. Yang

Research output: Contribution to journalArticle

Abstract

Recent data on isoscalar giant monopole resonance (ISGMR) in the calcium isotopes 40,44,48Ca have suggested that Kτ, the asymmetry term in the nuclear incompressibility, has a positive value. A value of Kτ>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 40,42,44,48Ca(α,α) reaction at Eα=386 MeV. These results conclusively discount the possibility of a positive value for Kτ, and are consistent with the previously-obtained values for this quantity.

Original languageEnglish
Article number135185
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume801
DOIs
Publication statusPublished - 2020 Feb 10

Keywords

  • Collectivity
  • Equation of state
  • Giant resonance
  • Nuclear incompressibility

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Howard, K. B., Garg, U., Itoh, M., Akimune, H., Bagchi, S., Doi, T., Fujikawa, Y., Fujiwara, M., Furuno, T., Harakeh, M. N., Hijikata, Y., Inaba, K., Ishida, S., Kalantar-Nayestanaki, N., Kawabata, T., Kawashima, S., Kitamura, K., Kobayashi, N., Matsuda, Y., ... Yang, Z. (2020). Compression-mode resonances in the calcium isotopes and implications for the asymmetry term in nuclear incompressibility. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 801, [135185]. https://doi.org/10.1016/j.physletb.2019.135185