Measurement of Absolute Single and Double Charge Exchange Cross Sections for Si(7-10)+ at 0.88-2.50 KeV/u Impacting He and H-2

作者：Moradmand A^*; El Ghazaly M O A; Mahaptra D P; Chutjian A

来源：Astrophysical Journal, The - Supplement Series, 2018, 234(1): 14.

DOI：10.3847/1538-4365/aaa02c

• atomic data
• comets: general
• molecular processes
• planets and satellites: atmospheres

First measurements. are reported for total, absolute, single, and double charge-exchange (CE) cross sections for Si(7-10)+ ions in the solar wind (SW), colliding with the prevalent astrophysical species H-2 and He found in comets, the interplanetary medium, and planetary atmospheres. Measurements are in the energy range 0.88-2.50 keV/u, corresponding to the energies of the "fast" and "slow" ion components of the SW. Limited agreement is found with single-exchange results calculated in the classical over-the-barrier model. These CE data are useful for understanding, in laboratory and astrophysical plasmas, photon emissions in the X-ray to visible energy range arising from resulting ion-stabilization steps.

• 出版日期2018-1