The shape of gold

被引:20
作者
Bally, B. [1 ,2 ]
Giacalone, G. [3 ]
Bender, M. [4 ]
机构
[1] Univ Paris Saclay, ESNT, IRFU, CEA, F-91191 Gif sur Yvette, France
[2] Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain
[3] Heidelberg Univ, Inst Theoret Phys, Philosophenweg 16, D-69120 Heidelberg, Germany
[4] Univ Lyon, Univ Claude Bernard Lyon 1, IP2I Lyon, CNRS IN2P3,UMR 5822, 4 rue Enr Fermi, F-69622 Villeurbanne, France
关键词
NUCLEAR-DATA SHEETS; CORE-EXCITATION; AU-197; COLLISIONS;
D O I
10.1140/epja/s10050-023-00955-3
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
Having a detailed theoretical knowledge of the low-energy structure of the heavy odd-mass nucleus Au-197 is of prime interest as the structure of this isotope repre-sents an important input to theoretical simulations of col-lider experiments involving gold ions performed at relativis-tic energies. In the present article, therefore, we report on new results on the structure of Au-197 obtained from state-of-the-art multi-reference energy density functional (MR-EDF) calculations. Our MR-EDF calculations were real-ized using the Skyrme-type pseudo-potential SLyMR1, and include beyond mean-field correlations through the mixing, in the spirit of the Generator Coordinate Method (GCM), of particle-number and angular-momentum projected triax-ially deformed Bogoliubov quasi-particle states. Compari-son with experimental data shows that the model gives a reasonable description of Au-197 with in particular a good agreement for most of the spectroscopic properties of the 3/2(1)(+) ground state. From the collective wave function of the correlated state, we compute an average deformation (beta) over bar (3/2(1)(+)) = 0.13 and (gamma) over bar (3/2(1)(+)) = 40 degrees for the ground state. We use this result to construct an intrinsic shape of 197Au representing a microscopically-motivated input for precision simulations of the associated collider processes. We discuss, in particular, how the triaxiality of this nucleus is expected to impact Au-197+Au-197 collision experiments at ultrarelativis-tic energy.
引用
收藏
页数:14
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