The resonance transition (n, l) = (40, 36) → (41, 35) of the antiprotonic helium (He+) isotope at a wavelength of 1154.9 nm was detected by laser spectroscopy. The population of He+ occupying the resonance parent state (40, 36) was found to decay at a rate of 0.45 ± 0.04 μs-1, which agreed with the theoretical radiative rate of this state. This implied that very few long-lived He+ are formed in the higher-lying states with principal quantum number n 41, in agreement with the results of previous experiments.
|Journal||Journal of Physics B: Atomic, Molecular and Optical Physics|
|Publication status||Published - Dec 28 2013|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics