Ab-initio Calculations of Spectral Functions in Open-Shell Isotopes

随着基于手性EFT的核力的引入和多体理论的发展，从头算核结构取得了显著的成果。自洽格林函数和耦合簇等方法已经达到了pf壳层中的核。然而，到目前为止，这些应用仅限于闭壳同位素。本提案要求提供旅费，以继续解决这一问题的正在进行的合作。该项目处于后期阶段，其重点（中等质量开壳的ab-ini计算）引起了国际理论界的兴趣。完成这个项目将需要三次前往萨克雷的CEA，与合作者和一名博士后一起工作。如果继续得到资助，它将有助于将英国纳入积极参与从头核结构的国家名单，这是合理的。这可能会增加萨里大学在核理论方面的良好声誉。研究开壳体系谱函数的可能性也将为准自由散射和敲除实验提供坚实的理论支持。几个英国团体在这些问题上很活跃，GSI或RIKEN等国际机构也计划进行实验。最后，请求的赠款将使我能够履行在萨克雷的ESNT组织一个相关讲习班的承诺，该讲习班已经获得批准，但我错过了旅费。

Ab-initio nuclear structure has achieved outstanding results following the introduction of nuclear forces based on chiral EFT and developments in many-body theory. Methods such as Self-Consistent Green's Functions and Coupled Cluster have reached nuclei in the pf-shell. However, these applications have so far been limited to closed-shell isotopes. The present proposal requests travel funds needed to continue an on-going collaboration that addresses this issue. The project is at an advanced stage and its focus (ab-inito calculations for medium-mass open-shells) is of interest to the international theory community. Completing the project will require three trips to the CEA, Saclay, to work with collaborators and a post-doc involved. If its continuation is funded, it is plausible that it will contribute to including the UK to the list of countries active in ab-initio nuclear structure. This may add to the strong reputation in nuclear theory that the University of Surrey already has. The possibility of studying spectral functions of open-shell systems will also offer a solid theoretical support to quasi-free scattering (QSF) and knockout experiments. Several UK groups are active on these issues and there are experiments planned at international institutions such as GSI or RIKEN. Finally, the requested grant would allow me to honour my commitments in the organization of a related workshop at the ESNT of Saclay that has been already approved but for which I miss travel funding.