Natural spectral-line broadening in atoms with unstable nuclei

18th International Youth Scientific School "Coherent Optics and Optical Spectroscopy"

Gainutdinov, R.Kh.^1 ; Mutygullina, A.A.^1 ; Petrova, A.S.^1

Kazan Federal University, 18 Kremlevskaja St., Kazan

420008, Russia^1

关键词: Decay widths;    Line profiles;    Parameter characterizing;    Self-interactions;    Spectral line;    Spontaneous emission spectrum;    Supercritical;    Unstable nuclei;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/613/1/012003/pdf
DOI  :  10.1088/1742-6596/613/1/012003

来源: IOP

【 摘 要 】

Spontaneous emission from atoms with unstable nuclei is investigated. The decay law of an unstable nucleus is shown to be not exponential and to depend on a parameter characterizing the self-interaction of the unstable nucleus. This parameter, as well as the decay width, can be extracted from the line profile. It is demonstrated on the instance of Beryllium atom with the unstable neutron-rich13Be nucleus that for light atoms this parameter may have an essential effect on their spontaneous emission spectrum. Spontaneous emission from supercritical atoms is investigated as well. Their spectrum is continuous and depends on the decay width of the supercritical nucleus. The most sensitivity to the magnitude of the decay width is observed in the X-ray band.