### Abstract

With a germanium detector array (Hyperball), we observed two [Formula presented]-ray peaks corresponding to the two transitions ([Formula presented] and [Formula presented]) in the [Formula presented] hypernucleus which was produced by the [Formula presented] reaction. The energies of the [Formula presented] rays are [Formula presented] and [Formula presented]. The energy difference was measured to be [Formula presented], which indicates a very small [Formula presented]-spin-dependent spin-orbit force between a [Formula presented] and a nucleon. This is the smallest level splitting by far ever measured in a hypernucleus.

Original language | English |
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Number of pages | 1 |

Journal | Physical review letters |

Volume | 88 |

Issue number | 8 |

DOIs | |

Publication status | Published - 2002 |

### ASJC Scopus subject areas

- Physics and Astronomy(all)

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## Cite this

*Physical review letters*,

*88*(8). https://doi.org/10.1103/PhysRevLett.88.082501