Phys. Rev. Lett. 86, 4255–4258 (2001)Observation of Spin-Orbit Splitting in Λ Single-Particle StatesReceived 1 September 2000; published in the issue dated 7 May 2001 The spin-orbit splitting of Λ single-particle states in Λ13C was measured. The 13C(K-,π-)Λ13C reaction was used to excite both the 1/2- and 3/2- states simultaneously, which have predominantly 12C(0+)×pΛ configuration. γ rays from the states to the ground state were measured in coincidence with the π-'s, by which ℓs splitting was found to be 152±54(stat)±36(syst) keV. The value is 20–30 times smaller than exhibited by the ℓs splitting in the nuclear shell model. This value gives us new insight into the YN interaction. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.4255
DOI:
10.1103/PhysRevLett.86.4255
PACS:
21.80.+a, 13.75.Ev, 25.80.Nv
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