Gamow-Teller strength and the spin-isospin coupling constants of the Skyrme energy functional
Gamow-Teller strength and the spin-isospin coupling constants of the Skyrme energy functional
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DOI：
10.1103/physrevc.65.054322
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发表时间：
2001-12
影响因子：
3.1
通讯作者：
Michael Bender;J. Dobaczewski;J. Dobaczewski;Jonathan Engel;W. Nazarewicz;W. Nazarewicz;W. Nazarewicz
中科院分区：
文献类型：
--
作者：
Michael Bender;J. Dobaczewski;J. Dobaczewski;Jonathan Engel;W. Nazarewicz;W. Nazarewicz;W. Nazarewicz
我们研究自旋-同位旋通道的Skyrme能量泛函的预测Gamow-Teller分布和超形变转动带的影响。我们使用广义Skyrme相互作用${\mathrm{SkO}}^{\ensuremath '}}$来描述偶-偶基态，然后通过线性回归分析时间-奇自旋-同位旋耦合的影响。某些项影响有限核中伽莫夫-泰勒共振的强度和能量，而不改变决定核物质自旋-同位旋性质的朗道参数${g}_{0}^{\ensuremath\'}}$。虽然现有的数据不足以唯一地确定所有的自旋-同位旋耦合，我们能够局部拟合。改变这些耦合常数并不改变质量与Skyrme功能描述旋转带。
We investigate the effects of the spin-isospin channel of the Skyrme energy functional on predictions for Gamow-Teller distributions and superdeformed rotational bands. We use the generalized Skyrme interaction ${\mathrm{SkO}}^{\ensuremath{'}}$ to describe even-even ground states and then analyze the effects of time-odd spin-isospin couplings, first term by term and then together via linear regression. Some terms affect the strength and energy of the Gamow-Teller resonance in finite nuclei without altering the Landau parameter ${g}_{0}^{\ensuremath{'}}$ that to leading order determines spin-isospin properties of nuclear matter. Though the existing data are not sufficient to uniquely determine all the spin-isospin couplings, we are able to fit them locally. Altering these coupling constants does not change the quality with which the Skyrme functional describes rotational bands.