| Budget Amount *help |
¥338,000,000 (Direct Cost: ¥338,000,000)
Fiscal Year 2009: ¥15,600,000 (Direct Cost: ¥15,600,000)
Fiscal Year 2008: ¥94,400,000 (Direct Cost: ¥94,400,000)
Fiscal Year 2007: ¥117,700,000 (Direct Cost: ¥117,700,000)
Fiscal Year 2006: ¥96,400,000 (Direct Cost: ¥96,400,000)
Fiscal Year 2005: ¥13,900,000 (Direct Cost: ¥13,900,000)
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| Research Abstract |
We carried out an experiment of precisionγ-ray spectroscopy of ^<12>_ΛC and ^<11>_ΛB hypernuclei at KEK and successfully revealed their structures, particularly their ground state doublets, which enables us to establish the ΛN spin-dependent interaction strengths. In order to extend our study on hypernuclearγ-ray spectroscopy at J-PARC, we developed and constructed a new Ge detector array (Hyperball-J) which is tolerant of higher counting rates. Here, we successfully developed a low-temperature Ge detector cooled with a mechanical refrigerator and fast background suppression counters using PWO scintillator. We also fabricated detectors for the SKS spectrometer system at the J-PARC K1.8 beam line and confirmed the performance of the spectrometer with pion beams.
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