Abstract
Optical pumping with theD 2 line is used to study the depolarization of the first excited2 P 3/2 states of alkaline earth ions and Yb+ ions in collisions with rare gas atoms. The deorientation cross sections for the even isotopes of Ba+ and Yb+ ions are obtained (in units of 10−16 cm2): rare gas He Ne Ar Kr Xeσ 1 (Ba+ 6p 2 P 3/2) 79(11) 89(13) 123(18) 152(22) 204(30)σ 1 (Yb+ 6p 2 P 3/2) 60(10) 62(9) 107(18) 133(17) 167(37) The cross sections are discussed in comparison with theoretical calculations and those of isoelectronic atoms. The comparison of the2 P 3/2 relaxation of even and odd (I=3/2) isotopes of Ba+ allows to draw conclusions on the nature of the depolarization interaction.
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