Neutron deformation parameter from comparative study of + and - Inelastic scattering

S. Iversen*, A. Obst, Kamal K. Seth, H. A. Thiessen, C. L. Morris, N. Tanaka, E. Smith, J. F. Amann, R. Boudrie, G. Burleson, M. Devereux, L. W. Swenson, P. Varghese, K. Boyer, W. J. Braithwaite, W. Cottingame, C. Fred Moore

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


Differential cross sections for the excitation of the 2+ state in O18 by 230-MeV pions are found to be about 70% larger for - than for +. Since the -nucleon interaction at this energy is dominated by the (3,3) resonance, it is concluded that the results imply that Rn1.3Rp, or alternatively, that (R)n (valence neutrons) 3(R)c(core), where is the deformation parameter and R the equilibrium radius of the deformed potential. We believe that these results constitute the first example of measurement of the neutron deformation parameter.

Original languageEnglish (US)
Pages (from-to)17-20
Number of pages4
JournalPhysical review letters
Issue number1
StatePublished - 1978

ASJC Scopus subject areas

  • General Physics and Astronomy


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