Abstract
Abstract: The single-electron approximation and quantum defect theory have been used to study the spectral properties of radiative transitions in beryllium ions (Be II). A total of 6386 transitions of Be II have been investigated. The lifetime of nS, nP, nD, and nF Rydberg states of Be II (1s2 nl), for n up to 30, have been computed and compared with the available data. Most of the lifetimes are new. Transition probabilities, oscillator strengths, and line strengths of 6386 radiative transitions of Be II are being reported here. A Python program was developed to calculate the radial integral, and the same program was used to compute the corresponding expectation values < r >, ensuring the validity of the results. This extensive study provides a substantial dataset on spectral properties of radiative transitions in Be II, which holds valuable applications in various spectroscopic contexts.
Keywords: Rydberg ion (atom), Radiative lifetimes, Oscillator strength, Transition probability, Rydberg energy, Beryllium ion.
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