Magnetic dipole hyperfine n-n transitions in H, D, T, and 3He+ WL(cm) MHz cm-1 Ei Ji Fi Fj Ej Jj Gamma Aji fij log gf H 21.106114 1420.405751 0.0473796 -0.03553472696 0.5 1s 2S 0.0 1.0 0.01184490899 0.5 1s 2S 2.8843E-15 2.8843E-15 5.7788E-12-11.23816 H 168.843097 177.556834 0.0059226 82258.9499573 0.5 2s 2S 0.0 1.0 82258.9558799 0.5 2s 2S 6.2649E+08 H 506.6626 59.17004 0.0019737 82258.9176330 0.5 2p 2P 0.0 1.0 82258.9196067 0.5 2p 2P 6.2649E+08 H 1267.58 23.6506 0.0007889 82259.2845083 1.5 2p 2P 1.0 2.0 82259.2852972 1.5 2p 2P 6.2649E+08 D 91.5720179 327.3843522 0.0109204 -0.00728024436 0.5 1s 2S 0.5 1.5 0.00364012218 0.5 1s 2S 4.6968E-17 4.6968E-17 1.1809E-12-11.62675 T 19.766082 1516.7014708 0.0505917 -0.03794378653 0.5 1s 2S 0.0 1.0 0.01264792884 0.5 1s 2S 3.5123E-15 3.5123E-15 6.1718E-12-11.20959 3He+ 3.450550 8665.649905 0.2890550 -0.21679122524 0.5 1s 2S 1.0 0.0 0.07226374175 0.5 1s 2S 1.9544E-12 1.9544E-12 1.1629E-11-10.45735 _____ Aji 1s Gould, R.J. 1994. Ap. J. 423, 522-528. H 2.88426E-15 D 4.69675E-17 T 3.51225E-15 3He+ 1.95436E-12 H MHz 1s 1420.405751768(1) Karshenboim, S.G. 2005. Phys. Rep. 422, 1-65. H MHz 2s 177.5568343(67) Kolachevsky, N., Matveev, A., Alnis, J., Parthey, C.G., Karshenboim, S.G., and Hansch, T.W. 2009. Phys. Rev. Lett. 102, 213002, 4pp. D MHz 1s 327.3843525222(17) Wineland, D.J. and Ramsey, N.F. 1972. Phys. Rev. A 5, 821-837. T MHz 1s 1516.701470775(7) Mathur, M.S., Crampton, S.B., Kleppner, D., and Ramsey, N.F., 1967. Phys. Rev. 158, 14-17. rescaled by Kramida 3He+ Mhz 1s 8665.649905(50) Fortson, E.N., Major, F.G., and Dehmelt, H.G. 1966. Phys. Rev. Lett. 16, 221-225. H 2s,2p Ralchenko, Yu., Kramida, A.E. , Reader, J., et al. 2011. NIST Atomic Structure Database, physics.nist.gov/asd Kramida, A.E. 2010. Atomic Data and Nuclear Data Tables 96, 589-644.