Photoemission atomic spectroscopy of laboratory plasma in the vacuum UV region

来自太阳/恒星/星云或其他天体的光储存了大量关于这些天体物理性质的知识。 这种光是由大气中的原子和分子发出的，因此对它的研究可以提供有关元素丰度、表面温度、压力、运动、磁场等的信息。发射的光谱，人们必须了解原子/离子在实验室中的行为，条件有点类似于天文体，然后对比实验室和天文数据。 我们在安提戈尼什的研究小组与俄罗斯、法国和美国的研究机构合作，在实验室环境中研究这些离子已经超过三十年，并对原子光谱分析领域做出了重大贡献。 本实验室报道的铂和硒的数据证实了化学奇特恒星中存在重元素铂，行星状星云中存在硒。 重离子的结构，以及f电子的结构，仍然是相当粗略的知识，这些是我们计划在未来五年内研究的离子。 像我们这样的研究小组提供的原子/离子结构的扩展实验数据对理论原子物理学家和天体物理学家测试/修订/扩展他们的离子模型或这些离子上的恒星现象也至关重要。

The light coming from the sun/stars/nebulae or other astronomical bodies has stored in it an immense amount of knowledge about the physical properties of these bodies.  This light is given out by the atoms and molecules present in their atmospheres, and therefore its study can provide information on elemental abundance, surface temperature, pressure, motions, magnetic field, etc.  To retrieve this information from the light (spectrum) emitted, one has to understand the behaviour of atoms/ions in the laboratory under conditions somewhat similar to those of the astronomical bodies, and then compare the laboratory and the astronomical data.  Our group in Antigonish, in collaboration with Russian, French and US research Institutes, has been engaged for over three decades in this endeavour of studying these ions in the laboratory environment and has made significant contributions to the field of Analysis of Atomic Spectra.  The data on platinum (Pt) and selenium reported by our laboratory confirmed the presence of heavy element Pt in chemically peculiar stars and selenium in planetary nebulae.  Knowledge of the structure of heavy ions, as well as, those with f-electrons, is still quite sketchy, and these are the ions we propose to investigate in the next five years.  The extended experimental data on atomic/ionic structures provided by research groups like ours are also of vital importance to theoretical atomic physicists and astrophysicists for testing/revising/extending their ionic models or stellar phenomena on these ions.