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Invariant Mass Spectroscopy for the Neutron Rich Nuclei
사토,추경호,방형찬,S. H. Choi,T. Nakamura,Y. Kondo,Y. Nakayama,N. Kobayashi,K. N. Tanaka,S. Deguchi,Y. Kawada,N. Tanaka,T. Sugimoto,T. Motobayashi,H. Sakurai,H. Otsu,N. Aoi,Y. Yanagisawa,S. Takeuchi,N. Fukuda 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
The neutron-rich carbon isotopes ^(19,17)C and a boron isotope ^(14)B are investigated respectively via proton inelastic and charge-exchange reactions on a liquid hydrogen target at around 70 MeV/nucleon at RIKEN. The invariant mass method in inverse kinematics involving coincidence detection of a charged fragment and a neutron both emitted at forward angles is employed to map the energy spectrum above the neutron decay threshold. Several resonance structures are revealed in the invariant mass spectra, and the nature for some of them is discussed from comparisons of differential cross section data with predictions of microscopic DWBA calculations based on spsdpf shell model wave functions and a recent parametrization of semi-microscopic nucleon-nucleus optical model potential (JLMB). By extrapolating the (p,n) cross sections leading to the 1^+ state at 1.27 MeV in ^(141)B to zero momentum transfer the Gamow-Teller transition strength is deduced. The value is found to compare well with that reported in a β-delayed neutron emission study.
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>
Invariant Mass Spectroscopy of 23O via the (p, p′) Reaction in Inverse Kinematics
Satou, Y.,Tshoo, K.,Bhang, H.,Choi, S.,Hwang, J. W.,Nakamura, T.,Kondo, Y.,Nakayama, Y.,Kobayashi, N.,Tanaka, K. N.,Deguchi, S.,Kawada, Y.,Tanaka, N.,Motobayashi, T.,Sakurai, H.,Otsu, H.,Aoi, N.,Takeu Springer-Verlag 2013 Few-body systems Vol.54 No.1
Invariant Mass Spectroscopy for the Neutron Rich Nuclei
Satou, Y.,Tshoo, K.,Bhang, H. C.,Choi, S. H.,Nakamura, T.,Kondo, Y.,Nakayama, Y.,Kobayashi, N.,Tanaka, K. N.,Deguchi, S.,Kawada, Y.,Tanaka, N.,Sugimoto, T.,Motobayashi, T.,Sakurai, H.,Otsu, H.,Aoi, N. Korean Physical Society 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.2
Causal relationship study of human sense for odor
( N. Kaneki ),( K. Shimada ),( H. Yamada ),( T. Miura ),( H. Kamimura ),( H. Tanaka ) 한국감성과학회 2002 춘계학술대회 Vol.2002 No.-
The impressions for odors are subjective and have individual differences. In this study, the Impressions of odors were investigated by covariance structure analysis. 46 subjects (men in their twenty) recorded their reactions to ten odorants by grading them on a seven-point scale in terms of twelve adjective pairs. Their reactions were quantified by using factor analysis and covariance structure analysis. The factors were extracted as "preference", "arousal" and "persistency". The subjects were classified into three groups according to the most suitable causal models (structural equation models). Each group had different causal relationship and different impression structure for odors. It was suggested that there is a possibility to evaluate the subjective impression of odor using covariance structure analysis.