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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
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
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>
Signature Anomaly in the Yrare Band of 119Xe
C.-B.Moon,S.J.Chae,J.H.Ha,T.Komatsubara,Y.Sasaki,T.Jumatsu,K.Yamada,K.Satou,K.Furuno 한국물리학회 2002 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.41 No.2
The excited states of the $^{119}$Xe nucleus have been studied by using in-beam $\gamma$-ray spectroscopy with the $^{107}$Ag ($^{16}$O, p3n) $^{119}$Xe fusion-evaporation reaction at a beam energy of 85 MeV. The level scheme of $^{119}$Xe has been derived from $\gamma$-$\gamma$ coincidence and $\gamma$-$\gamma$ angular correlation analyses. We have, for the first time, established the second negative-parity favored and unfavored states built on the 11/2$^-$ state, namely the yrare rotational bands in $^{119}$Xe. In contrast to the behavior of the yrast bands where the favored states are lying lower in energy, the yrare favored states were observed to lie above the unfavored band. Such a signature inversion becomes normal at $I$=12 $\hbar$, which is the first observation of critical inversion-spin in an odd-mass Xe. We suggest that the signature inversion might be associated with a shape coexistence in terms of the $\gamma$ deformations between the favored and the unfavored yrare bands based on the coupling of the favored $h_{11/2}$ neutron with the even- and the odd-spin members of the $\gamma$ bands in even-even neighbors.
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
Study on the Realization of Zinc Point
J. V. Widiatmo,M. Sakai,K. Yamazawa,K. Satou,J. Tamba,M. Arai 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Two zinc-point cells were fabricated using high grade zinc samples, impurity elements of one of which were analyzed extensively. Temperature measurements during the solid-liquid coexistence, under which the zinc fixed-point is defined, were conducted, the result of which was used to perform a thermal analysis. Comparisons of zinc-point temperature realized within the newly fabricated cells were also conducted. Zinc-point depression due to impurity elements was calculated based on the chemical element analysis. Evaluation was made on the thermal analysis, the cell comparison results and the chemical element analysis, to lead to an estimation of uncertainty caused by the impurity elements. The present paper outlines the cell fabrication, the temperature measurements and the evaluation of impurity effect to the zinc-point realization.