Measuring cesium electron impact cross-sections using a magneto-optical trap

Measurement of the absolute total electron impact cross section on Cs atoms using a magnetooptical trap

“…We are in agreement with the results of Chen and Gallagher [19] and McFarland and Kinney [20] beyond 100 eV, who carried out measurements on the electron-impact cross sections in our working energy range using other techniques. We also confirm the recent experimental and theoretical results of MacAskill et al [16] and Lukomski et al [17].…”

“…These include experimental studies in different energy regions (0.3 to 9.0 eV range by Visconti et al [7], 2 to 18 eV range by Jaduszliwer and Chen [8] and 0.3 to 400.0 eV by Brode [9]), theoretical studies including two-state close-coupling calculations (Karule and Peterkop [10], Burke and Mitchell [11]), five-state relativistic close-coupling calculations (Scott et al [12]), polarization-potential calculations (Crown and Russek [13] and Balling [14]), and Breit-Pauli R-matrix calculations (Bartschat [15]). More recently, MacAskill et al [16] have measured the total electron impact cross sections of 133 Cs atoms in a MOT in the energy range from 0.3 to 400 eV. They observed a good agreement between convergent close-coupling (CCC) calculations and the experimental measurements.…”

“…Recent theoretical results using the CCC scheme reported by MacAskill et al [16] and Lukomski et al [17] covering our energy range, others in the low-energy range reported earlier by Karule and Peterkop [10], Burke and Mitchell [11], and the experimental results reported by Visconti et al [7], Jaduszliwer and Chan [8], Chen and Gallagher [19] and McFarland and Kinney [20], are shown in Fig. 4.…”

Electron Scattering by Atoms, Ions, and Molecules

“…In this technique, a laser is used to trap the atoms of interest, and absolute cross sections can be obtained directly from the trap loss when the laser is switched off. Examples of such measurements are the work of Schappe et al (1995) and MacAskill et al (2002). Lukomski et al (2006) showed that the technique can, in principle, also be used to obtain total cross sections from laser-excited initial states that would be hard to measure otherwise.…”

“…The 12-state DBSR results ofZatsarinny and Bartschat (2008) are compared with various sets of experimental data(Visconti, Slevin and Rubin (1970), Jaduszliwer and Chan (1992),Kauppila and Stein (2001), MacAskill et al (2002)), as well as predictions from a 40-state semirelativistic Breit-Pauli R-matrix (BPRM)calculation byBartschat and Fang (2000) and a nonrelativistic CCC model presented byMacAskill et al (2002). (From Zatsarinny and Bartschat (2008).…”