Decoupling of valence neutrons from the core in 16C

Z. Elekes, Zs Dombrádi, A. Krasznahorkay, H. Baba, M. Csatlós, L. Csige, N. Fukuda, Zs Fülöp, Z. Gácsi, J. Gulyás, N. Iwasa, H. Kinugawa, S. Kubono, M. Kurokawa, X. Liu, S. Michimasa, T. Minemura, T. Motobayashi, A. Ozawa, A. SaitoS. Shimoura, S. Takeuchi, I. Tanihata, P. Thirolf, Y. Yanagisawa, K. Yoshida

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Abstract

The neutron and proton excitations in 16C nucleus have been investigated by use of the Coulomb-nuclear interference method applied to the 208Pb+16C inelastic scattering. Angular distribution of the 16C nuclei in the inelastic channel populating the first 2 + state has been measured. The neutron and proton transition matrix elements, Mn and Mp, have been determined from the "Coulomb" and "matter" deformation-length parameters obtained by distorted wave calculations. The Mp or its corresponding B(E2;2+1→0+) value was found to be extremely small: 0.28±0.06 Weisskopf units consistent with a recent lifetime measurement. Furthermore, the extracted Mn/Mp ratio has an unexpectedly large value of 7.6±1.7. These results suggest that the 2+1 state in 16C is a nearly pure valence neutron excitation. copy; 2004 Published by Elsevier B.V.

Original languageEnglish
Pages (from-to)34-40
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume586
Issue number1-2
DOIs
Publication statusPublished - Apr 22 2004

Keywords

  • 21.10.Gv
  • 24.10.Eq
  • 25.70.De
  • 27.20.+n
  • 29.30.Kv
  • Angular distribution
  • Coulomb excitation of C
  • Distorted wave calculation
  • Neutron and proton transition matrix elements

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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  • Cite this

    Elekes, Z., Dombrádi, Z., Krasznahorkay, A., Baba, H., Csatlós, M., Csige, L., Fukuda, N., Fülöp, Z., Gácsi, Z., Gulyás, J., Iwasa, N., Kinugawa, H., Kubono, S., Kurokawa, M., Liu, X., Michimasa, S., Minemura, T., Motobayashi, T., Ozawa, A., ... Yoshida, K. (2004). Decoupling of valence neutrons from the core in 16C. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 586(1-2), 34-40. https://doi.org/10.1016/j.physletb.2004.02.022