Observation of a spin-flip M1 transition in 7ΛLi

H. Tamura, K. Tanida, D. Abe, H. Akikawa, K. Araki, H. Bhang, T. Endo, Y. Fujii, T. Fukuda, O. Hashimoto, K. Imai, H. Hotchi, Y. Kakiguchi, J. H. Kim, Y. D. Kim, T. Miyoshi, T. Murakami, T. Nagae, H. Noumi, H. OutaK. Ozawa, T. Saito, J. Sasao, Y. Sato, S. Satoh, R. I. Sawafta, M. Sekimoto, T. Takahashi, L. Tang, H. H. Xia, S. H. Zhou, L. H. Zhu

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156 Citations (Scopus)


Using a large-acceptance germanium detector array (Hyperball), we have observed a spin-flip M1 γ transition between the ground-state spin doublet of 7 Li (3/2+ → 1/2+). The observed energy of 691.7 ± 0.6 (stat) ± 1.0 (syst) keV provides crucial information on the strength of the spin-spin interaction between a Λ and a nucleon. This is the first observation of well-identified hypernuclear γ transitions using germanium detectors.

Original languageEnglish
Pages (from-to)5963-5966
Number of pages4
JournalPhysical Review Letters
Issue number26
Publication statusPublished - 2000


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