A crystal spectrometer is used to study 6.5-MeV, foil-excited oxygen-beam x rays. The transitions from (1s) (2p) 2 ³P to (1s)²1 ¹S₀ He-like and from (1s) (2s) ⁴P^∘ to (1s)²(2s)²S1/2 Li-like oxygen states are observed to have lifetimes of 1.47 ±{} 0.02 and 1.87 ±{} 0.1 nsec, respectively. Both decays are observed to have long-lived components. These results are compared to previous lifetime measurements of x-ray emitting and electron-emitting oxygen states.
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Richard et al. (1973) studied this question.
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