偶质量Pd同位素中的同位标量巨共振
Isoscalar Giant Resonances in the even-A Pd Isotopes
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中文总结 AI 辅助
本研究通过386 MeV非弹性α散射提取104、106、108、110Pd的同位标量巨单极共振强度分布，结合纳入准粒子-振动耦合效应的准粒子随机相位近似，探讨核物质不可压缩性的相关问题。
中文摘要 AI 辅助
对核素图上同位标量巨单极共振（ISGMR）的研究可提供饱和密度附近核物质不可压缩性（K∞）的相关信息。此类研究已揭示不同理论方法间存在差异：基于Skyrme相互作用的准粒子随机相位近似（QRPA）能重现双满壳核90Zr和208Pb的ISGMR强度分布，但其对开壳中重核的强度分布描述表明，实验应观测到更高的重心能量，而后者需要更小的K∞，因此被认为更“软”。本研究通过386 MeV非弹性α散射提取104、106、108、110Pd的ISGMR强度分布，以补充关于这种“软度”的讨论，所提取的巨共振强度分布与该同位素范围内的预期一致。在QRPA方法中额外纳入准粒子-振动耦合（QPVC）效应，并与上述ISGMR强度分布进行比较。
英文摘要
Studies of the isoscalar giant monopole resonance (ISGMR) across the chart of nuclides provide insight into the incompressibility of nuclear matter near saturation density, K(infinity). Such studies had revealed a discrepancy between theoretical approaches: quasiparticle random phase approximation (QRPA) derived from Skyrme interactions reproduce the strength distributions of the ISGMR in the doubly-closed-shell nuclei 90Zr and 208Pb, but their descriptions of strength distributions in open-shell medium-heavy nuclei suggest higher centroid energies should be experimentally observed. The latter nuclei required a smaller K(infinity) and were thus deemed softer. The present work serves to add to this softness discourse by extracting ISGMR strength distributions for 104,106,108,110Pd via 386-MeV inelastic alpha-scattering. The extracted giant resonance strength distributions are consistent with expectations in this isotopic range. Additional Quasiparticle Vibration Coupling (QPVC) effects are included with the QRPA approach and compared to aforementioned ISGMR strength distributions.
