Figure 1

Mass spectrum in the vicinity of m/z = 88 showing the flat-top peak of ⁸⁸Sr measured by the center Faraday cup (black lines). The ⁸⁸Sr peak tails on the low- and high-mass sides is also shown. Peak tails measured by SEM without the RPQ are shown in blue lines and peak tails measured by SEM with the RPQ are shown in red lines.