Spin-forbidden radiative decay rates from the 3′,3P 1,2 and 3′,1P 1 states of helium
copyright American Physical Society http://dx.doi.org/10.1103/PhysRevA.83.042503
We have calculated atomic helium spontaneous decay rates and absorption oscillator strengths for the spin-forbidden transitions from 3′,3P 1,2 and 3′,1P 1 to all lower 1S 0 and 3S 1 states. In particular we found A 10=44.33(4)′, s -1 for the E1 transition 3′,3P 1-1′,1S 0 and 0.1147(1) s -1 for the M2 transition 3′,3P 2-1′,1S 0. © 2011 American Physical Society.