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熊谷 正芳*; 内田 知宏*; 村澤 皓大*; 高村 正人*; 池田 義雅*; 鈴木 裕士; 大竹 淑恵*; 浜 孝之*; 鈴木 進補*
Materials Research Proceedings, Vol.6, p.57 - 62, 2018/10
被引用回数:0 パーセンタイル:100The convergence behavior of the parameters related to microstructural characteristics -
was studied during optimizations in a common line profile analysis software program based on the convolutional multiple whole profile (CMWP) method. The weighted sums of squared residual (WSSR) was a criterion of the optimization. The parameters
and
, which are related to the dislocation density and to the crystallite size, respectively, strongly affect the line profile shape. Therefore, the distributions of WSSRs on the space parameters
and
were first observed. The variation trajectory of parameters
and
during iterative calculations with several values of parameter
was then observed, along with the variations when all of the parameters were variable. In the case where only three parameters were variable, we found that a smaller initial value of
should be chosen to ensure stability of the calculations. In the case where all parameters were variable, although all of the results converged to similar values, they did not precisely agree. To attain accurate optimum values, a two-step procedure is recommended.
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:88 パーセンタイル:2.54(Physics, Nuclear)We have investigated the isoscalar giant resonances in the Sn isotopes using inelastic scattering of 386-MeV particles at extremely forward angles, including 0
. 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,
, 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.