Eur. Phys. J. A (2007) 33: 243-246
https://doi.org/10.1140/epja/i2007-10471-9

HYP 2006

γ -ray spectroscopy study of ¹¹ _ΛB and ¹² _ΛC

¹ Department of Physics, Tohoku University, 980-8578, Sendai, Japan
² High Energy Accelerator Research Organization (KEK), 305-0801, Tsukuba, Ibaraki, Japan
³ Department of Physics, Kyoto University, 606-8502, Kyoto, Japan
⁴ Department of Physics, Osaka University, 560-0043, Osaka, Japan
⁵ RIKEN, 351-0198, Wako, Japan
⁶ Osaka Electro-Communication University, 572-8530, Osaka, Japan
⁷ China Institute of Atomic Energy, P.O. Box-275-30, 102413, Beijing, China
⁸ Department of Physics, University of Tokyo, 113-0033, Tokyo, Japan

^* e-mail: ma@lambda.phys.tohoku.ac.jp

Received: 28 February 2007
Accepted: 7 July 2007
Published online: 3 September 2007

Abstract

In this paper, a preliminary result from the latest hypernuclear γ -ray spectroscopy experiment (KEK-E566) is presented together with a short discussion. The experiment was performed at the KEK-PS K6 beam line in 2005. In this experiment, the ¹²C(π⁺, K ⁺)¹² _ΛC reaction was employed to populate ¹² _ΛC/¹¹ _ΛB hypernuclei. A germanium detector array, Hyperball2, was constructed to detect γ -rays emitted from the hypernuclei produced. Three hypernuclear γ -ray peaks were observed and assigned.