TY - JOUR
T1 - Decoupling of valence neutrons from the core in 17B
AU - Dombrádi, Zs
AU - Elekes, Z.
AU - Kanungo, R.
AU - Baba, H.
AU - Fülöp, Zs
AU - Gibelin, J.
AU - Horváth, Á
AU - Ideguchi, E.
AU - Ichikawa, Y.
AU - Iwasa, N.
AU - Iwasaki, H.
AU - Kanno, S.
AU - Kawai, S.
AU - Kondo, Y.
AU - Motobayashi, T.
AU - Notani, M.
AU - Ohnishi, T.
AU - Ozawa, A.
AU - Sakurai, H.
AU - Shimoura, S.
AU - Takeshita, E.
AU - Takeuchi, S.
AU - Tanihata, I.
AU - Togano, Y.
AU - Wu, C.
AU - Yamaguchi, Y.
AU - Yanagisawa, Y.
AU - Yoshida, A.
AU - Yoshida, K.
N1 - Funding Information:
We would like to thank the RIKEN Ring Cyclotron staff for their assist during the experiment. One of authors (Z.E.) is grateful for the JSPS Fellowship Program in RIKEN and the Bolyai grant in Hungary. The European authors thank the kind hospitality and support from RIKEN. The present work was partly supported by the Grant-in-Aid for Scientific Research (No. 1520417) by the Ministry of Education, Culture, Sports, Science and Technology and by OTKA T46901, T42733, T38404, T32113.
PY - 2005/8/11
Y1 - 2005/8/11
N2 - Proton inelastic scattering study of 17B nucleus has been performed at 43.8 A MeV average energy in inverse kinematics using a liquid hydrogen target. In the Doppler corrected γ ray spectrum, a single peak with an energy of 1089(15) keV appeared corresponding to the first excited state of 17B. Based on the reaction cross section, β2pp′ deformation parameter of the transition is deduced by distorted wave analysis. Comparing it with the electric quadrupole moment of the nucleus, it is shown that the deformation of the neutron distribution is large (βn∼0.6), and the neutron effective charge is much smaller (en<0.12) than usual (∼0.5). The small effective charge is interpreted as a consequence of the decoupling of valence neutrons from the core.
AB - Proton inelastic scattering study of 17B nucleus has been performed at 43.8 A MeV average energy in inverse kinematics using a liquid hydrogen target. In the Doppler corrected γ ray spectrum, a single peak with an energy of 1089(15) keV appeared corresponding to the first excited state of 17B. Based on the reaction cross section, β2pp′ deformation parameter of the transition is deduced by distorted wave analysis. Comparing it with the electric quadrupole moment of the nucleus, it is shown that the deformation of the neutron distribution is large (βn∼0.6), and the neutron effective charge is much smaller (en<0.12) than usual (∼0.5). The small effective charge is interpreted as a consequence of the decoupling of valence neutrons from the core.
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U2 - 10.1016/j.physletb.2005.06.031
DO - 10.1016/j.physletb.2005.06.031
M3 - Article
AN - SCOPUS:22544470584
SN - 0370-2693
VL - 621
SP - 81
EP - 88
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 1-2
ER -