Hydrogen doppler spectroscopy using $^{15}$N ions

L. Borucki; H.W. Becker; F. Gorris; S. Kubsky; W.H. Schulte; C. Rolfs

EPJ

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2019 Impact factor 2.176

Hadrons and Nuclei

Eur. Phys. J. A 5, 327-336

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 E_R = 6.40 MeV narrow resonance in ¹H(¹⁵N, $\alpha\gamma$ )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 $10.41 \pm 0.25$ keV was observed (theory = 10.4 keV). Studies of the vibrational Doppler widths of H-bonds on a Si $\langle 100 \rangle$ surface were performed using a $4\pi$ $\gamma$ -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.