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論文

Isoscalar giant resonances in the Sn nuclei and implications for the asymmetry term in the nuclear-matter incompressibility

Li, T.*; Garg, U.*; Liu, Y.*; Marks, R.*; Nayak, B. K.*; Madhusudhana Rao, P. V.*; 藤原 守*; 橋本 尚信*; 中西 康介*; 奥村 瞬*; et al.

Physical Review C, 81(3), p.034309_1 - 034309_11, 2010/03

 被引用回数:78 パーセンタイル:2.37(Physics, Nuclear)

We have investigated the isoscalar giant resonances in the Sn isotopes using inelastic scattering of 386-MeV $$alpha$$ particles at extremely forward angles, including 0$$^{circ}$$. The strength distributions for various multipoles were extracted by a multipole decomposition analysis based on the expected angular distributions of the respective multipoles. We find that the centroid energies of the isoscalar giant monopole resonance (ISGMR) in the Sn isotopes are significantly lower than the theoretical predictions. In addition, the asymmetry term, $$K_{tau}$$, in the expression for the nuclear incompressibility has been determined from the ISGMR data in Sn isotopes and is found to be consistent with a number of indirectly extracted values for this parameter.

論文

Hybridization between the conduction band and 3$$d$$ orbitals in the oxide-based diluted magnetic semiconductor In$$_{2-x}$$V$$_x$$O$$_3$$

小林 正起*; 石田 行章*; Hwang, J. I.*; Song, G. S.*; 滝沢 優*; 藤森 淳; 竹田 幸治; 大河内 拓雄*; 岡根 哲夫; 斎藤 祐児; et al.

Physical Review B, 79(20), p.205203_1 - 205203_5, 2009/05

 被引用回数:4 パーセンタイル:74.29(Materials Science, Multidisciplinary)

The electronic structure of In$$_{2-x}$$V$$_x$$O$$_3$$ ($$x=0.08$$) has been investigated by photoemission spectroscopy and X-ray absorption spectroscopy (XAS). The V $$2p$$ core-level photoemission and XAS spectra revealed that the V ion is in the trivalent state, which is the same valence state as that of In in In$$_2$$O$$_3$$. The V $$3d$$ partial density of states obtained by the resonant photoemission technique showed a sharp peak above the O $$2p$$ band. While the O $$1s$$ XAS spectrum of In$$_{2-x}$$V$$_x$$O$$_3$$ was similar to that of In$$_2$$O$$_3$$, there were differences in the In $$3p$$ and $$3d$$ XAS spectra between the V-doped and pure In$$_2$$O$$_3$$. The observations give clear evidence for hybridization between the In-derived conduction band and the V $$3d$$ orbitals in In$$_{2-x}$$V$$_x$$O$$_3$$.

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