Experimental electron loss and capture cross sections in ion–atom collisions

Quantifying absolute carbon isotope ratios by AMS

“…Their data confirm a critical shape change in the cross-section of ionization, however. Classic low energy data for ionization of atomic carbon came from Fogel et al [24], while Dmitriev et al compile high energy charge-changing cross-sections that are scattered across previous Soviet journals [25]. These latter data sets are critical to the model in ionizing carbon atoms; but all data are sparse, and a critical gap appears between Fogel's 60 keV highest energy and Dmitriev's 420 keV lowest energy, as seen in Fig.…”

“…The fitted function (solid line) is the sum of a lognormal at high energy and a modfied log-normal at lower energy fitting the available data from Fogel et al [24] (. ), Dmitriev et al [25] (N), and data of scaled He collisions from Sanders et al [27] (Ç). Ormond et al data (s) is plotted to emphasize the shape, but not fitted as discussed in the text [22].…”

“…5. Data sources fall into two separate groups roughly separated by carbon's v 0 , with the work of Luna et al [17] and Dmitriev et al [25] on the high energy side and those from Fogel et al [24], Ormrod et al [22], Matic and Cobic [37], and Tsuji et al [18] at low energies. Double electron capture on atomic carbon came from the helium target of Nakai and Sataka [38], scaled according to Sanders et al [27] for argon.…”

“…Ar data (d): [22,30]; H 2 data: [30,[33][34][35][36]; N 2 data: [30][31][32]34]. [17]; h, [25]; d, [19]; ., [22]; j [37]. r 10 Data (+) came from a He target [38] scaled for Ar, following [27].…”

Electron capture in intermediate-to-fast heavy ion collisions with neutral atoms

“…It is noteworthy that the cross sections for molecular targets also may depend on their vibrational states during the collision, particularly at very low energies [30]. Some experimental data are available for a few molecules but no systematic observation and interpretation are available yet [38][39][40][41].…”