Abstract
The subject of our studies is the spectroscopy of high energy δ-rays, emitted in collisions of very heavy ions. In this experimental talk I would like to discuss collision systems with combined charge (Zu = Zp+Zt) of the projectile (Zp) and the target (Zt) atoms about equal or larger than the reciprocal of the fine structure constant: Zu • α ≳ 1. Furthermore, we concentrate on δ-electrons with very high energies — above 100 keV up to 2000 keV. It is easy to be understood qualitatively that a large energy and momentum transfer to a bound electron is possible only if the initial momentum of the electron is also very high — i.e. high energy δ-rays originate mostly from the sharper localized, strongly bound innermost shells. For very heavy quasi-atoms one expects a rapid increase of the high-momentum components as a consequence of the enormous relativistic “shrinking” of the electronic wave functions1,2,3. Hence, the high energy tail of the δ-ray spectrum can be attributed to the high energy component of the momentum distribution of strongly bound quasiatomic electrons and, thus, provide information about their wave function and and energy.
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Kozhuharov, C. (1983). δ-Ray Spectroscopy of Quasi-Atoms. In: Greiner, W. (eds) Quantum Electrodynamics of Strong Fields. NATO Advanced Study Institutes Series, vol 80. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-2139-0_13
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DOI: https://doi.org/10.1007/978-1-4899-2139-0_13
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