Determination Of The Differential Cross-section For Electron Excitation Of The Triplet-2s(1) State Of Helium Near Threshold Via Metastable Time-of-flight Spectra.
PhDAtomic physicsUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/189480/2/7627621.pd