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Tshoo, K.,Satou, Y.,Bertulani, C.A.,Bhang, H.,Choi, S.,Nakamura, T.,Kondo, Y.,Deguchi, S.,Kawada, Y.,Nakayama, Y.,Tanaka, K.N.,Tanaka, N.,Togano, Y.,Kobayashi, N.,Aoi, N.,Ishihara, M.,Motobayashi, T. Elsevier 2014 Physics letters: B Vol.739 No.-
<P><B>Abstract</B></P> <P>One-neutron knockout from <SUP>24</SUP>O leading to the first excited state in <SUP>23</SUP>O has been measured for a proton target at a beam energy of 62 MeV/nucleon. The decay energy spectrum of the neutron unbound state of <SUP>23</SUP>O was reconstructed from the measured four momenta of the <SUP>22</SUP>O fragment and emitted neutron. A sharp peak was found at <SUB> E decay </SUB> = 50 ± 3 keV , corresponding to an excited state in <SUP>23</SUP>O at 2.78 ± 0.11 MeV , as observed in previous measurements. The longitudinal momentum distribution for this state was consistent with <I>d</I>-wave neutron knockout, providing support for a <SUP> J π </SUP> assignment of 5 / <SUP> 2 + </SUP> . The associated spectroscopic factor was deduced to be <SUP> C 2 </SUP> S ( 0 <SUB> d 5 / 2 </SUB> ) = 4.1 ± 0.4 by comparing the measured cross section ( σ − 1 n exp = 61 ± 6 mb ) with a distorted wave impulse approximation calculation. Such a large occupancy for the neutron 0 <SUB> d 5 / 2 </SUB> orbital is in line with the N = 16 shell closure in <SUP>24</SUP>O.</P>
Search forn−n¯oscillation in Super-Kamiokande
Abe, K.,Hayato, Y.,Iida, T.,Ishihara, K.,Kameda, J.,Koshio, Y.,Minamino, A.,Mitsuda, C.,Miura, M.,Moriyama, S.,Nakahata, M.,Obayashi, Y.,Ogawa, H.,Sekiya, H.,Shiozawa, M.,Suzuki, Y.,Takeda, A.,Takeuch American Physical Society 2015 PHYSICAL REVIEW D - Vol.91 No.7
Measurement of Atmospheric Neutrino Flux Consistent with Tau Neutrino Appearance
Abe, K.,Hayato, Y.,Iida, T.,Ishihara, K.,Kameda, J.,Koshio, Y.,Minamino, A.,Mitsuda, C.,Miura, M.,Moriyama, S.,Nakahata, M.,Obayashi, Y.,Ogawa, H.,Shiozawa, M.,Suzuki, Y.,Takeda, A.,Takeuchi, Y.,Ueshi American Physical Society 2006 Physical review letters Vol.97 No.17
Measurement of Unbound Excited States of 24O
Tshoo, K.,Satou, Y.,Nakamura, T.,Aoi, N.,Bhang, H. C.,Choi, S.,Deguchi, S.,Delaunay, F.,Gibelin, J.,Honda, T.,Ishihara, M.,Kawada, Y.,Kondo, Y.,Kobayashi, T.,Kobayashi, N.,Marques, F. M.,Matsushita, M Korean Physical Society 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.2
PROCESSING OF INTERSTELLAR DUST GRAINS IN GALAXIES
Kaneda, H.,Ishihara, D.,Onaka, T.,Sakon, I.,Suzuki, T.,Kobata, K.,Kondo, T.,Yamagishi, M.,Yasuda, A. The Korean Astronomical Society 2012 天文學論叢 Vol.27 No.4
We have performed a systematic study of interstellar dust grains in various environments of galaxies. AKARI has revealed the detailed properties of dust grains not only in star-forming regions but also in regions not relevant to star formation, some of which are found not to follow our old empirical knowledge. Because of its unique capabilities, AKARI has provided new knowledge on the processing of large grains and polycyclic aromatic hydrocarbons (PAHs). For example, we detect PAHs from elliptical galaxies, which show unusual spectral features and spatial distributions, demonstrating importance of material processing in the interstellar space. We find that copious amounts of large grains and PAHs are flowing out of starburst galaxies by galactic superwinds, which are being shattered and destroyed in galactic haloes. We discover evidence for graphitization of carbonaceous grains near the center of our Galaxy, providing a clue to understanding the activity of the Galactic center. We review the results obtained from our AKARI program, focusing on the processing of carbonaceous grains in various environments of galaxies.