The two-photon decay of the metastable helium ion
Metastable He ion two photon decay, observing photon coincidence angular correlation in spectral distribution
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Metastable He ion two photon decay, observing photon coincidence angular correlation in spectral distribution
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General formula for artificial electron decay life times
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Solar flare radiation data from Pioneer spacecraft, detailing anisotropy, heliocentric longitude gradients, decay time constants and energy spectra
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