Neutron-proton radius differences and isovector deformations from π+ and π- inelastic scattering from 18O

S. Iversen*, H. Nann, A. Obst, Kamal K Seth, N. Tanaka, C. L. Morris, H. A. Thiessen, K. Boyer, W. Cottingame, C. Fred Moore, R. L. Boudrie, D. Dehnhard

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

42 Scopus citations


π+ and π- elastic and inelastic scattering from 18O have been measured at T(π)=164 MeV. Consistent with the results at 230 MeV, it is found that the ratio σ(π-) σ(π+) for the 21+ state is 1.86(16), while for the 31- state it is 0.89(6). These results are interpreted as indicating differences in neutron and proton deformations characterizing the 21+ transition and partial neutron blocking for the 31- transition. Optical model analysis of elastic scattering leads to the conclusion that 〈rn2 1 2-〈rp2 1 2=0.03(3) fm.

Original languageEnglish (US)
Pages (from-to)51-54
Number of pages4
JournalPhysics Letters B
Issue number1
StatePublished - Mar 12 1979

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


Dive into the research topics of 'Neutron-proton radius differences and isovector deformations from π<sup>+</sup> and π<sup>-</sup> inelastic scattering from <sup>18</sup>O'. Together they form a unique fingerprint.

Cite this