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R C M Learner1 and A Pery-Thorne1
Published under licence by IOP Publishing Ltd
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Citation R C M Learner and A Pery-Thorne 1971 Phys. Bull. 22 581
DOI 10.1088/0031-9112/22/10/012
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Atomic spectroscopy is an experimental technique that can be applied to a large number of problems beyond the obvious one of elucidating atomic structure. After the rapid advances of the 1920s and 1930s, when the groundwork for the development of quantum theory was established, there came a quiescent period, followed more recently by a further rapid expansion.