Dissociative recombination without curve crossings: <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow> <mml:mi>NeH</mml:mi> </mml:mrow> <mml:mo>+</mml:mo> </mml:msup> </mml:math> and <mml:math xmlns:mml="http://www.w3.org

Experiments on dissociative recombination on <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"> <a:msup> <a:mrow> <a:mi>ArH</a:mi> </a:mrow> <a:mo>+</a:mo> </a:msup> </a:math> show a small but nonzero cross section at low collision energies. Therefore, dissociative recombination of <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"> <b:msup> <b:mrow> <b:mi>ArH</b:mi> </b:mrow> <b:mo>+</b:mo> </b:msup> </b:math> , as well as <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"> <c:msup> <c:mrow> <c:mi>NeH</c:mi> </c:mrow> <c:mo>+</c:mo> </c:msup> </c:math> , is studied theoretically. Accurate fixed-nuclei electron-scattering calculations are performed to produce <d:math xmlns:d="http://www.w3.org/1998/Math/MathML"> <d:mrow> <d:mi>S</d:mi> </d:mrow> </d:math> -matrices that are used as input into a multichannel quantum defect treatment of the dissociation process. Results are compared to available experimental data.