Fine-Structure Transitions in Collisions of Kr⁺(²P_j) with Rare Gases

Abstract

Fine-structure transitions, j=3⁄2→1⁄2 and 1⁄2→3⁄2, in the collisions of Kr⁺(²P_j) with rare gases were studied with an ion energy-loss spectrometer in the energy range from 500 eV to 1300 eV. The ions were produced with an electron-impact type ion-source. The fractional ratios of j=1⁄2 to j=3⁄2 states, N(1⁄2)⁄N(3⁄2), contained in the primary beam were determined as a function of the electron energy in the ton source from 20 eV to 150 eV. The values were almost constant above the electron energy of 40 eV, and the aberage value of 0.479±0.002 which is close but not exactly equal to the statistical value, 0.5, was obtained. The cross sections for the fine-structure transitions in the collisions of Kr⁺ with He were also obtained.