Measurement of the hyperfine structure and isotope shifts of the 3s23p2 3P2 → 3s3p3 3D3o transition in silicon

The hyperfine structure and isotope shifts of the 3s(2)3p(2) P-3(2) -> 3s3p(3) D-3(3)o transition in silicon have been measured. The transition at 221.7 nm was studied by-laser induced fluorescence in an atomic Si beam. For Si-29, the hyperfine A constant for the 3s(2)3p(2) P-3(2) level was determined to be -160.1 +/- 1.3 MHz (1 sigma error), and the A constant for the 3s3p(3) D-3(3)o level is -532.9 +/- 0.6 MHz. The isotope shifts (relative to the abundant isotope Si-28) of the transition were determined to be 1753.3 +/- 1.1 MHz for Si-29 and 3359.9 +/- 0.6 MHz for Si-30. This is an improvement by about two orders of magnitude over a previous isotope shift measurement. From these results we are able to predict the hyperfine structure and isotope shift of the radioactive Si-31 atom, which is of interest in building a scalable quantum computer.