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atoms (J-PARC E03, E07 and future)Yamamoto, Takeshi; Fujita, Manami; Gogami, Toshiyuki*; Harada, Takeshi*; Hayakawa, Shuhei*; Hosomi, Kenji; Ichikawa, Yudai; Ishikawa, Yuji*; Kamata, K.*; Kanauchi, H.*; et al.
EPJ Web of Conferences, 271, p.03001_1 - 03001_5, 2022/11
bound state in the 
C
reaction at 1.8 GeV/
Nagae, Tomofumi*; Ekawa, Hiroyuki; Hasegawa, Shoichi; Hayakawa, Shuhei; Hosomi, Kenji; Ichikawa, Yudai; Imai, Kenichi; Kimbara, Shinji; Nanamura, Takuya*; Naruki, Megumi; et al.
AIP Conference Proceedings 2130, p.020015_1 - 020015_9, 2019/07
Times Cited Count：12 Percentile：97.69(Physics, Nuclear) bound states in the C
reaction at 1.8 GeV/ in J-PARCNagae, Tomofumi*; Ekawa, Hiroyuki; Hasegawa, Shoichi; Hosomi, Kenji; Ichikawa, Yudai; Imai, Kenichi; Sako, Hiroyuki; Sato, Susumu; Sugimura, Hitoshi; Tanida, Kiyoshi; et al.
Proceedings of Science (Internet), 281, p.038_1 - 038_7, 2017/05
C level structure by 
-ray spectroscopyHosomi, Kenji; Ma, Y.*; Ajimura, Shuhei*; Aoki, Kanae*; Dairaku, Seishi*; Fu, Y.*; Fujioka, Hiroyuki*; Futatsukawa, Kenta*; Imoto, Wataru*; Kakiguchi, Yutaka*; et al.
Progress of Theoretical and Experimental Physics (Internet), 2015(8), p.081D01_1 - 081D01_8, 2015/08
Times Cited Count：14 Percentile：65.44(Physics, Multidisciplinary)Level structure of the C hypernucleus was precisely determined by means of -ray spectroscopy. We identified four -ray transitions via the C
reaction using a germanium detector array, Hyperball2. The spacing of the ground-state doublet 
was measured to be 
(stat)
(syst)keV from the direct 
transition. Excitation energies of the 
and 
states were measured to be 
, keV and 
, keV, respectively. The obtained level energies provide definitive references for the reaction spectroscopy of 
hypernuclei.
-hypernuclei with S-2S spectrometerNanamura, Takuya; Ichikawa, Yudai; Nagae, Tomofumi*; Ekawa, Hiroyuki; Tanida, Kiyoshi
no journal, ,
Spectroscopic study of -hypernuclei provides insights into the -
interaction and the 
coupling strength. A missing mass spectroscopy of the -hypernuclei was performed via the C
reaction at J-PARC K1.8 beam line in 2015. In this measurement, we have achieved the missing mass resolution 5.4 MeV (FWHM). It is important to achieve a better missing mass resolution. As the next step, we are constructing a new spectrometer S-2S (Strangeness -2 Spectrometer) for the 
. In this condition, the total missing-mass resolution would be affected mainly due to the target energy loss straggling. To reduce energy loss straggling in the target, we are developing an active target composed of scintillating fibers. Construction of the magnets and most parts of detectors for S-2S has been completed. It will soon be ready for installation in J-PARC K1.8.
at the J-PARC K1.8 beam lineIchikawa, Yudai; Imai, Kenichi; Nagae, Tomofumi*; Fujioka, Hiroyuki*; Tokiyasu, Atsushi*
no journal, ,
no abstracts in English
-hypernucleiNanamura, Takuya; Ichikawa, Yudai; Nagae, Tomofumi*; Ekawa, Hiroyuki; Tanida, Kiyoshi
no journal, ,
Spectroscopic study of -hypernuclei provides insights into the - interaction and the coupling strength. A missing mass spectroscopy of the -hypernuclei was performed via the C reaction at J-PARC K1.8 beam line in 2015. In this measurement, we have achieved the missing mass resolution 5.4 MeV (FWHM). It is important to achieve a better missing mass resolution. As the next step, we are constructing a new spectrometer S-2S (Strangeness -2 Spectrometer) for the . In this condition, the total missing-mass resolution would be affected mainly due to the target energy loss straggling. To reduce energy loss straggling in the target, we are developing an active target composed of scintillating fibers. We will present status of developments of these detectors.
