Neutral Strontium: S to singlet P transition at 460.7 nm
plus 412 nm to continuum. There is also a strong
auto-ionization line at 405.5 nm (single laser, 2 photon
transition).
Transition Strengths
Branching ratio from P1/2 to D3/2 vs P1/2
to S1/2: 1:13
