Interaction cross sections (σI) for all known Li isotopes (⁶Li-¹¹Li) and ⁷Be, ⁹Be, and ¹⁰Be on targets Be, C, and Al have been measured at 790 MeV/nucleon. Root mean square radii of these isotopes as well as He isotopes have been deduced from the σI by a Glauber-type calculation. Appreciable differences of radii among isobars (⁶He-⁶Li, ⁸He-⁸Li, and ⁹Li-⁹Be) have been observed for the first time. The nucleus ¹¹Li showed a remarkably large radius suggesting a large deformation or a long tail in the matter distribution.
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Tanihata et al. (1985) studied this question.
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