Brown, J.
and Evenson, K.
(1999),
Direct Measurement of the Fine-Structure Interval of <sup>27</sup>Al in its Ground <sup>2</sup>P State, Physical Review A (Atomic, Molecular and Optical Physics), [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=104862
(Accessed December 26, 2024)