Isotope and electric field effects in dissociative recombination of D-3(+)

The cross section for dissociative recombination of vibrationally cold D-3(+) has been measured at the ion storage ring CRYRING. The rate constant at 300 K, alpha = 2.7 x 10(-8) cm(3) s(-1), is a factor of 4.3 smaller than the corresponding value for H-3(+) measured earlier in CRYRING. An electric field of 30 V/cm was introduced in the electron-ion interaction region. This had no measurable effect on the dissociative recombination cross section. This suggests that the cross sections measured in storage rings for H-3(+) and its isotopic variants can be directly compared with theoretical results once such results become available.