Measurement of the Average Equilibrium Charge of Fast Heavy Ions in a Solid by <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi mathvariant="normal">H</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow></math></span> Emission at the Exit Surface

S. Della-Negra; Y. Le Beyec; B. Monart; K. Standing; K. Wien

doi:10.1103/PhysRevLett.58.17

Measurement of the Average Equilibrium Charge of Fast Heavy Ions in a Solid by $H^{+}$ Emission at the Exit Surface

S. Della-Negra, Y. Le Beyec, B. Monart, K. Standing, and K. Wien

Phys. Rev. Lett. 58, 17 – Published 5 January 1987

Abstract

The $H^{+}$ secondary-ion yield from the surface of solid targets of Au, C, and nitrocellulose has been used to measure mean charges of energetic ions of ${}^{84}{Kr}$ and ${}^{40}{Ar}$ (at 1.16 MeV/u) at the beam-exit surface. Values for Kr ions were found to be 1.6 to 3 electronic charges ( $e$ ) less than those found 70 ns later, after Auger decay. No such difference was observed for Ar ions of the same velocity.