Bestimmung derP 3/2 —D 3/2-Aufspaltimg und Nachweis von crossing-Signalen im Zustandn=3 von ionisiertem Helium

Radio frequency induced transitions between 3D _5/2- and 3P _3/2-Zeeman sublevels in He⁺ have been detected. From the position of the line center of theD _5/2 (m=?1/2)—P _3/2(m=1/2) transition, the splittings 3D _5/2—3P _3/2=(17259±13) MHz and 3P _3/2—3D _3/2=(81±13) MHz have been deduced. The theoretical values are 17254.9 and 85.4 MHz. Three crossings of Zeeman sublevels of the 3S-, 3P- and 3D-states of He⁺ have been detected both by a magnetic and an electric field modulation method. The crossing-field strengths are in good agreement with the calculated values.