## Ab initio calculation of the transfer and multipole rates of the Na ground state hyperfine levels perturbed by atomic hydrogen
Due to an unfortunate error, equation (16) is wrong. The correct analytic expression of the rate coefficient given in Fig. 4 is: The suggestion given in the concluding remarks that the upper limit of the hydrogen density is a fraction of is no longer correct. To prevent complete collisional depolarization of the ground state of Na, the maximum value of is a fraction of . © European Southern Observatory (ESO) 2000 Online publication: January 29, 2001 |