Measurement Of Gamma-Rays From B-11(Lambda) And C-12(Lambda)

From the C-12(pi(+), K+)(Lambda)C-12 reaction, the gamma-rays of 261.6 +/- 0.24 keV (7/2(+) -> 5/2(+)) and 1481.7 +/- 0.7 keV (1/2(+) -> 5/2(+)) of B-11(Lambda), and 2667.3 +/- 2.8 keV (1(2)(-)-> 2(1)(-)) of C-12(Lambda) hypernuclei have been identified using a large germainum detector array Hyperball2 at K6 beam line of KEK. The observed energies of the transactions 1481.7 keV and 261.6 keV are significnatly different from the values predicted by the shell model using the Delta and S-N parameters determined from the Li-7(Lambda) data.