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清水 悠晴*; 池田 陽一*; 若林 琢巳*; 芳賀 芳範; 天谷 健一*; 日高 宏之*; 柳澤 達也*; 網塚 浩*
Journal of the Physical Society of Japan, 80(9), p.093701_1 - 093701_4, 2011/09
被引用回数:8 パーセンタイル:50.77(Physics, Multidisciplinary)Low-temperature specific heat measurements under magnetic field were performed on a single crystal UBe. The specific heat shows a behavior below 0.7 , where is the superconducting transition temperature, suggesting the existence of point nodes in the superconducting gap. Together with the isotropic behavior of the upper critical magnetic field, the symmetry of the Cooper paring is discussed.
清水 悠晴*; 池田 陽一*; 若林 琢巳*; 天谷 健一*; 芳賀 芳範; 日高 宏之*; 柳澤 達也*; 網塚 浩*
Journal of the Physical Society of Japan, 80(Suppl.A), p.SA100_1 - SA100_3, 2011/07
被引用回数:1 パーセンタイル:11.35(Physics, Multidisciplinary)Low-temperature specific heat and static dc magnetization measurements have been performed in the superconducting state of the heavy-fermion compound UBe. The superconducting phase diagram was obtained from these measurements. We obtained Ginzburg-Landau parameter as a function of temperature and showed that a paramagnetic effect is present down to 0.5 K.
清水 悠晴*; 池田 陽一*; 若林 琢巳*; 天谷 健一*; 芳賀 芳範; 日高 宏之*; 柳澤 達也*; 網塚 浩*
Journal of Physics; Conference Series, 273, p.012084_1 - 012084_4, 2011/02
被引用回数:3 パーセンタイル:62.76(Physics, Condensed Matter)Static dc magnetization measurements in the superconducting mixed state of a single crystal UBe were performed by means of a capacitance Faraday-force method down to 0.24 K. Below the upper critical field , not only a peak effect but also an additional broad anomaly have been observed in magnetization curves. We report superconducting phase diagram of UBe obtained by our magnetization measurements, including these anomalies.
舘 義昭; 高木 直行*; 飯田 拓海*; 若林 利男*
no journal, ,
使用済燃料に含まれる長寿命核分裂生成物(LLFP)であるSe-79, Zr-93, Pd-107及びCs-135はいずれも中性子吸収断面積が小さく、原子炉の中性子による核変換が困難であるとされてきていた。しかしながら、これらの核種においても中性子エネルギーが低くなるほど吸収断面積が増大し、核変換効率の向上が期待できる。そこで、軽水炉よりも炉内温度が低い重水炉の炉内に極低温領域を創生し、冷中性子によりLLFPを効果的に核変換させるため、CANDU炉を想定した冷中性子生成装置について検討した。