Unified analysis of spin isospin responses of nuclei
Unified analysis of spin isospin responses of nuclei
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DOI：
10.1103/physrevc.72.067303
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发表时间：
2004-11
影响因子：
3.1
通讯作者：
T. Wakasa;M. Ichimura;H. Sakai
中科院分区：
文献类型：
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作者：
T. Wakasa;M. Ichimura;H. Sakai
用连续随机位相近似方法研究了$q=0\phantom{\rule{0.3em}{0ex}}{\mathrm{fm}}^{\ensuremath{-}1}$动量转移的伽莫特勒(GT)响应函数和$q\ensuremath{\approx}1.7\phantom{\rule{0.3em}{0ex}}{\mathrm{fm}}^{\ensuremath{-}1}$准弹性散射(QES)的粒子响应函数。\rho}+{g}^{‘}$模型交互。通过将计算结果与最近的实验数据进行比较，得到了Landau-Migdal(LM)参数：${g}_{\mathit{NN}}^{‘}$和${g}_{N\ensureath{\Delta}}^{’}$。GT共振峰和QES峰下的静音响应函数限制了QES峰的强度，而GT总强度的猝灭和QES峰附近的静音强度的增强提供了有关${g}N确保数学{\Delta}}^‘}$的信息。我们在${g}_{\mathit{NN}}^{‘}=0.6\ifmmode\pm\else\textpm\fi{}0.1$和${g}_{N\ensuremath{\Delta}}^{’}=0.35\ifmmode\pm\else\textpm\fi{}0.16$上获得了$q=0\phantom{\rule{0.3em}{0ex}}{\mathrm{fm}}^{\ensuremath{-}1}$和${g}_{\mathit{nn}}^{‘}=0.7\ifmmoad\pm\Else\TextPM\fi{’}0.1$和${g}_{N\ensuremath{\Delta}}^{‘}=0.3\ifmmode\pm\else\textpm\fi{}0.1$at$q\ensuremath{\approx}1.7\phantom{\rule{0.3em}{0ex}}{\mathrm{fm}}^{\ensuremath{-}1}$.这些结果表明，Lm参数对Q的依赖性很弱。
We investigate the Gamow-Teller (GT) response functions at a momentum transfer of $q=0\phantom{\rule{0.3em}{0ex}}{\mathrm{fm}}^{\ensuremath{-}1}$ and the pionic response functions for quasielastic scattering (QES) at $q\ensuremath{\approx}1.7\phantom{\rule{0.3em}{0ex}}{\mathrm{fm}}^{\ensuremath{-}1}$ using the continuum random phase approximation with the $\ensuremath{\pi}+\ensuremath{\rho}+{g}^{'}$ model interaction. The Landau-Migdal (LM) parameters, ${g}_{\mathit{NN}}^{'}$ and ${g}_{N\ensuremath{\Delta}}^{'}$, are estimated by comparing the calculations with recent experimental data. The peak of the GT resonance and the pionic response functions below the QES peak constrain ${g}_{\mathit{NN}}^{'}$, whereas the quenching of the GT total strength and the enhanced pionic strength around the QES peak provide information about ${g}_{N\ensuremath{\Delta}}^{'}$. We obtained ${g}_{\mathit{NN}}^{'}=0.6\ifmmode\pm\else\textpm\fi{}0.1$ and ${g}_{N\ensuremath{\Delta}}^{'}=0.35\ifmmode\pm\else\textpm\fi{}0.16$ at $q=0\phantom{\rule{0.3em}{0ex}}{\mathrm{fm}}^{\ensuremath{-}1}$ and ${g}_{\mathit{NN}}^{'}=0.7\ifmmode\pm\else\textpm\fi{}0.1$ and ${g}_{N\ensuremath{\Delta}}^{'}=0.3\ifmmode\pm\else\textpm\fi{}0.1$ at $q\ensuremath{\approx}1.7\phantom{\rule{0.3em}{0ex}}{\mathrm{fm}}^{\ensuremath{-}1}$. These results indicate that the q dependence of the LM parameters is weak.