0000000000918954
AUTHOR
R. Loch
Measurement of the electronicgfactor ofH2+
Ion trapping and spin-dependent charge-exchange techniques were used to determine the electron g factor of ${\mathrm{H}}_{2}^{+}$ as a first step to provide a precise test of the theory of molecular g factors. Accessible to us were the vibrational states 4, 5, and 6. Averaged over these vibrational states we obtain g(v=4,5,6) =2.002 2837(18) 7(18) in agreement with the corresponding theoretical value of g=2.002 282 8(8). As a by-product we have measured the rotational g factor to be ${g}_{\mathrm{rot}=0.920(40)}$, compared with the calculated value of ${g}_{\mathrm{rot}=0.9244}$.
Spin dependence of low energy charge exchange between H 2 + and Na
The difference in charge exchange rate in collisions between spin oriented sodium atoms and H 2 + ions has been measured at an energy of about 1 eV. H 2 + was stored in a Penning trap and polarized by spin exchange with Na beam atoms from a hexapole magnet. The ion loss from the trap due to charge exchange was different as we depolarized the atomic beam. From the data we obtain a ratio of cross sections for singlet and triplet collisionsQ 1/Q 3=1.5±0.2 andQ 3=1.2·10−15 cm2.