Projectile energy dependence of L X-ray emission in collisions of Xe²³⁺ with In target: role of Coulomb ionization and quasi-molecular effects

Abstract

<jats:title>Abstract</jats:title><jats:p>The X-ray emissions in the interaction of 3–6 MeV Xe<jats:sup>23+</jats:sup> ions into thick solid In target are measured. The projectile-to-target and target <jats:italic>L</jats:italic><jats:sub>α</jats:sub>/<jats:italic>L</jats:italic><jats:sub>β</jats:sub> X-ray production intensity ratios are observed to strongly depend on the projectile energy. The dependence deviates from Coulomb ionization predictions, which implies the important roles of coupling between subshells and the activation of 4<jats:italic>f</jats:italic>σ rotational couplings for projectile energy larger than 5 MeV.</jats:p>