Hydrogen doppler spectroscopy using 15N ions
L. Borucki - H.W. Becker - F. Gorris - S. Kubsky - W.H. Schulte - C. Rolfs
Institut für Physik mit Ionenstrahlen, Ruhr-Universität Bochum, Bochum, Germany
Received: 1 March 1999 Communicated by B. Povh
Abstract
The energy spread of atomic and molecular ion beams from the 4 MV Dynamitron tandem
accelerator at the Ruhr-Universität Bochum has been studied and in part minimized. Using
the ER = 6.40 MeV narrow resonance in 1H(15N,
)12C with an
15N energy spread of 4.55 keV, the Doppler broadening for several hydrogen-bearing gases
was found to be in good agreement with expectation: e.g. for NH3 gas a
rotational-vibrational Doppler width of 
keV was observed (theory = 10.4
keV). Studies of the vibrational Doppler widths of H-bonds on a Si 
surface were performed using a 
-ray detection system together with UHV-chambers
for sample preparation, transport, and analysis. The results showed that further improvements
in the experimental set-ups are needed for such investigations.
Copyright Springer-Verlag
