Preparing isomerically pure beams of short-lived nuclei at JYFLTRAP
  A new procedure to prepare isomerically clean samples of ions with a mass resolving power of more than 100,000 has been developed at the JYFLTRAP tandem Penning trap system. The method utilises a dipolar rf-excitation of the ion motion with separated oscillatory fields in the precision trap. During a subsequent retransfer to the purification trap, the contaminants are rejected and as a consequence, the remaining bunch is isomerically cleaned. This newly-developed method is suitable for very high-resolution cleaning and is at least a factor of five faster than the methods used so far in Penning trap mass spectrometry. 
T. Eronen, V.-V. Elomaa, U. Hager, J. Hakala, A. Jokinen, A.   Kankainen, S. Rahaman, J. Rissanen, C. Weber, J. Aysto