Observation of spin-orbit splitting in lambda single-particle states.
The spin-orbit splitting of Lambda single-particle states in (13)(Lambda)C was measured. The 13C(K-,pi(-))(13)(Lambda)C reaction was used to excite both the 1/2(-) and 3/2(-) states simultaneously, which have predominantly 12C(0(+)) x p(Lambda) configuration. gamma rays from the states to the ground state were measured in coincidence with the pi(-)'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.
Ajimura
S
S
Department of Physics, Osaka University, Toyonaka, Osaka, 560-0043, Japan.
Hayakawa
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Kishimoto
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Kohri
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Matsuoka
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Minami
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Mori
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Morikubo
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Saji
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Sakaguchi
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Shimizu
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Sumihama
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Chrien
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May
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Pile
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Rusek
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Sutter
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Eugenio
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Franklin
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Khaustov
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Paschke
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Quinn
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Schumacher
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Franz
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Fukuda
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Noumi
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Outa
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Gan
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Tang
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Yuan
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Tamura
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Nakano
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Tamagawa
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Tanida
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Sawafta
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