Structure changes along the lowest rotational band of the antiprotonic helium atom

被引：10

作者：

Baye, Daniel ^{[1
]}

Dohet-Eraly, Jeremy ^{[1
]}

Schoofs, Philippe ^{[1
]}

机构：

[1] ULB, Phys Quant & Phys Nucl Theor & Phys Math, CP 229, B-1050 Brussels, Belgium

来源：

PHYSICAL REVIEW A | 2019年 / 99卷 / 02期

关键词：

LAGRANGE-MESH CALCULATIONS; METASTABLE STATES; ENERGY-LEVELS; WAVE-FUNCTION; 3-BODY ATOMS; GROUND-STATE; ALPHAKAPPA-E; ALPHAPI-E; RATES; H-2(+);

D O I：

10.1103/PhysRevA.99.022508

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Along its lowest rotational band, the antiprotonic helium atom undergoes several changes of structure. It evolves from an hydrogenlike atom with broader and broader resonant states, to a quasistable molecularlike structure with narrow resonances, and then to a quasistable Rydberg pseudoatom. The antiprotonic helium atom is studied with high accuracy as a nonrelativistic three-body Coulomb system in the framework of the Lagrange-mesh method. Its metastable states are first determined from L = 0 to L = 80 by searching conditions of calculation for which energies are stationary. Mean values of distances between the particles are then easily deduced. They show the evolution of the structure of the system. Broad resonances are also analyzed with the complex scaling method. Physical interpretations are provided.

引用

页数：11

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