Persistent decoupling of valence neutrons toward the dripline: Study of C20 by γ spectroscopy

Z. Elekes, Zs Dombrádi, T. Aiba, N. Aoi, H. Baba, D. Bemmerer, B. A. Brown, T. Furumoto, Zs Fülöp, N. Iwasa, Á Kiss, T. Kobayashi, Y. Kondo, T. Motobayashi, T. Nakabayashi, T. Nannichi, Y. Sakuragi, H. Sakurai, D. Sohler, M. TakashinaS. Takeuchi, K. Tanaka, Y. Togano, K. Yamada, M. Yamaguchi, K. Yoneda

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Abstract

The very neutron-rich nucleus C20 has been investigated by inelastic scattering on Pb208 and liquid hydrogen targets. Through distorted wave analysis, the reduced electric quadrupole transition probability B(E2;0g.s.+→21+)<18.4 (stat) e2 fm4 and the neutron transition probability Mn2=292±52 (stat) fm4 have been derived. A simple shell model calculation has shown a need for a factor of about 0.4 decrease of the normal polarization charges to elucidate the results. This is interpreted as a decoupling of the valence neutrons from the nuclear core in carbon isotopes heavier than C14.

Original languageEnglish
Article number011302
JournalPhysical Review C - Nuclear Physics
Volume79
Issue number1
DOIs
Publication statusPublished - 2009 Jan 29

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Elekes, Z., Dombrádi, Z., Aiba, T., Aoi, N., Baba, H., Bemmerer, D., Brown, B. A., Furumoto, T., Fülöp, Z., Iwasa, N., Kiss, Á., Kobayashi, T., Kondo, Y., Motobayashi, T., Nakabayashi, T., Nannichi, T., Sakuragi, Y., Sakurai, H., Sohler, D., ... Yoneda, K. (2009). Persistent decoupling of valence neutrons toward the dripline: Study of C20 by γ spectroscopy. Physical Review C - Nuclear Physics, 79(1), [011302]. https://doi.org/10.1103/PhysRevC.79.011302