Intensity of Forbidden Transitions in the Alkalis


IN a recent paper,1 one of us (A. F. S.) calculated the intensity of 1S–3D transitions in the alkalis. These were attributed to quadripole radiation, since they are forbidden by the selection principle for dipole radiation.


  1. 1

    Proc. Roy. Soc., 128, A, p. 591.

  2. 2

    Zeit. f. Phys., 57, p. 387.

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WHITELAW, N., STEVENSON, A. Intensity of Forbidden Transitions in the Alkalis. Nature 127, 817 (1931).

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