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

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...

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Vydáno v:	Physics letters. B Ročník 801; s. 135185
Hlavní autoři:	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., Nakagawa, A., Nakamura, S., Nosaka, K., Okamoto, S., Ota, S., Weyhmiller, S., Yang, Z.
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Elsevier B.V 10.02.2020 Elsevier
Témata:	Collectivity Equation of state Giant resonance Nuclear incompressibility Collectivity Giant resonance Nuclear incompressibility Equation of state
ISSN:	0370-2693, 1873-2445
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Popis
Shrnutí:	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.
ISSN:	0370-2693 1873-2445
DOI:	10.1016/j.physletb.2019.135185