1. Hypernuclear fine structure in (9)(lambda)Be.
- Author
-
Akikawa H, Ajimura S, Chrien RE, Eugenio PM, Franklin GB, Franz J, Gang L, Imai K, Khaustov P, May M, Pile PH, Quinn B, Rusek A, Sasao J, Sawafta RI, Schmitt H, Tamura H, Tang L, Tanida K, Yuan L, Zhou SH, Zhu LH, and Zhu XF
- Abstract
With a germanium detector array (Hyperball), we observed two gamma-ray peaks corresponding to the two transitions (5/2(+)-->1/2(+) and 3/2(+)-->1/2(+)) in the (9)(Lambda)Be hypernucleus which was produced by the 9Be(K-,pi(-)) reaction. The energies of the gamma rays are 3029 +/- 2 +/- 1 keV and 3060 +/- 2 +/- 1 keV. The energy difference was measured to be 31.4(+2.5)(-3.6) keV, which indicates a very small Lambda-spin-dependent spin-orbit force between a Lambda and a nucleon. This is the smallest level splitting by far ever measured in a hypernucleus.
- Published
- 2002
- Full Text
- View/download PDF