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-decay properties and Gamow-Teller strength distributions in 
neutron-rich nucleiYoshida, Sota*; Utsuno, Yutaka; Shimizu, Noritaka*; Otsuka, Takaharu*
Physical Review C, 97(5), p.054321_1 - 054321_17, 2018/05
Times Cited Count：34 Percentile：93.04(Physics, Nuclear)no abstracts in English
Suzuki, Hiroshi; Bae, S.*; Kanematsu, Manabu*
Advances in Materials Science and Engineering, 2016, p.8936084_1 - 8936084_6, 2016/00
Times Cited Count：2 Percentile：7.58(Materials Science, Multidisciplinary)The deformation behavior of nanostructure of calcium silicate hydrate (CSH) in Portland cement (PC) paste under compression was successfully characterized by the atomic pair distribution function (PDF) measured by using Synchrotron X-rays. The PDF of the PC paste showed a unique deformation behavior for a short range order below 2.0 nm in radius corresponding to the size of the CSH particle (globule), while the deformation for a long range order was similar to that of a calcium hydroxide phase measured by the diffraction peak shift. The compressive deformation of the CSH nanostructure can be divided into three stages with different interactions between globules. This behavior would originate from the granular nature of CSH which deforms with increasing packing density by slipping the interfaces between globules, rearranging the overall CSH nanostructure. This study will lead to increasing applications of the PDF technique to provide clues for understanding the deformation mechanism of CSH in PC paste.
proton superfluidity in neutron star matter; Impact of bulk propertiesTanigawa, Tomonori; Matsuzaki, Masayuki*; Chiba, Satoshi
Physical Review C, 70(6), p.065801_1 - 065801_7, 2004/12
Times Cited Count：9 Percentile：51.36(Physics, Nuclear)We study the proton pairing gap in neutron star matterputting emphasis on influence of the Dirac effective mass and theproton fraction on the gap within the relativistic Hartree-Bogoliubovmodel. The gap equation is solved using the Bonn-B potential as aparticle-particle channel interaction. It is found that the maximalpairing gap 
is 1-2MeV, which has a strongcorrelation with the Dirac effective mass. Hence we suggest that itserves as a guide to narrow down parameter sets of the relativisticeffective field theory. Furthermore, the more slowly protons increasewith density, the lower the peak of the gap and the wider thesuperfluid range become.
Hotta, Takashi; Ueda, Kazuo*
Physical Review Letters, 92(10), p.107007_1 - 107007_4, 2004/03
Times Cited Count：13 Percentile：59.49(Physics, Multidisciplinary)We discuss microscopic aspects of odd-parity triplet pair in orbital degenerate systems. From the concept of off-diagonal long-range order, a pair state is unambiguously defined as the eigenstate with the maximum eigenvalue of pair correlation function. Performing this scheme by a numerical technique, we clarify that the odd-parity triplet pair occurs as an out-of-phase combination of local triplets induced by Hund's rule coupling for the lattice including two sites in the unit cell.
pairing and its dependence on background density in a relativistic Hartree-Bogoliubov modelTanigawa, Tomonori; Matsuzaki, Masayuki*; Chiba, Satoshi
Physical Review C, 68(1), p.015801_1 - 015801_8, 2003/07
Times Cited Count：16 Percentile：68.45(Physics, Nuclear)We calculate a pairing gap in binary mixed matter of nucleons and 
hyperons within the relativistic Hartree-Bogoliubov model since a recent experiment suggests a weaker attraction than before, which has a significant impact on properties of neutron stars in various aspects. Lambda hyperons to be paired up are immersed in background nucleons in normal state. A phenomenological interaction, which is derived relativistically from the Lagrangian of the system, is adopted to the gap equation. It is found that at background density 
the pairing gap is very small, and that denser background makes it rapidly suppressed. This result suggests a mechanism, specific to mixed matter dealt with relativistic models, of its dependence on the nucleon density.
A.Mengoni*; Nakajima, Yutaka
Journal of Nuclear Science and Technology, 31(2), p.151 - 162, 1994/02
Times Cited Count：115 Percentile：99.02(Nuclear Science & Technology)no abstracts in English
A.Mengoni*; Nakajima, Yutaka
JAERI-M 93-177, 26 Pages, 1993/09
no abstracts in English
Suzuki, Hiroshi; Kanematsu, Manabu*; Bae, S.*; Shiro, Ayumi; Shobu, Takahisa
no journal, ,
The deformation behavior of nanostructure of calcium silicate hydrate (CSH) in Portland cement (PC) paste under compression was successfully characterized by the atomic pair distribution function (PDF) measured by using Synchrotron X-rays. The PDF of the PC paste showed a unique deformation behavior for a short range order below 2.0 nm in radius corresponding to the size of the CSH particle (globule), while the deformation for a long range order was similar to that of a calcium hydroxide phase measured by the diffraction peak shift. The compressive deformation of the CSH nanostructure can be divided into three stages with different interactions between globules. This behavior would originate from the granular nature of CSH which deforms with increasing packing density by slipping the interfaces between globules, rearranging the overall CSH nanostructure. This study will lead to increasing applications of the PDF technique to provide clues for understanding the deformation mechanism of CSH in PC paste.
Utsuno, Yutaka; Fujita, Yoshitaka*
no journal, ,
no abstracts in English
Utsuno, Yutaka; Fujita, Yoshitaka*
no journal, ,
no abstracts in English
