Electron-impact excitation of multiply-charged ions using energy loss in merged beams: e + Si sup 3 + (3s sup 2 S sub 1/2 ) yields e + Si sup 3 + (3p sup 2 P sub 1/2, 3/2 )
Conference
·
OSTI ID:6234172
- National Inst. of Standards and Technology, Boulder, CO (USA) Joint Inst. for Lab. Astrophysics, Boulder, CO (USA)
- Oak Ridge National Lab., TN (USA)
- Oak Ridge National Lab., TN (USA) University Coll., London (UK)
For the first time absolute total cross sections for electron-impact excitation of a multiply-charged ion have been measured using an electron-energy-loss technique. Measurements were made near threshold for the process e + Si{sup 3+}(3s{sup 2}S{sub 1/2}) {yields} e + Si{sup 3+}(3p{sup 2}P{sub 1/2},{sub 3/2}) -- 8.88 eV. The 10{sup {minus}15} cm{sup 2} measured cross section agrees with results of 7-state close coupling calculations to better than the {plus minus}20% (90% CL) total uncertainty of the measurements. Convoluting the theoretical curve with a Gaussian energy distribution indicates an energy width of 0.15 {approx lt} {Delta}E {approx lt} 0.20 eV. 12 refs., 2 figs.
- Research Organization:
- Oak Ridge National Lab., TN (USA); National Inst. of Standards and Technology, Boulder, CO (USA); Joint Inst. for Lab. Astrophysics, Boulder, CO (USA); University Coll., London (UK)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- AC05-84OR21400; AI01-76PR06010
- OSTI ID:
- 6234172
- Report Number(s):
- CONF-900923-5; ON: DE91002884; TRN: 91-000027
- Resource Relation:
- Conference: 5. international conference on the physics of highly charged ions, Giessen (Germany, F.R.), 10-14 Sep 1990
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
74 ATOMIC AND MOLECULAR PHYSICS
SILICON IONS
ELECTRON-ION COLLISIONS
ENERGY LOSSES
EXCITATION
MULTICHARGED IONS
TOTAL CROSS SECTIONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
ELECTRON COLLISIONS
ENERGY-LEVEL TRANSITIONS
ION COLLISIONS
IONS
LOSSES
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena
SILICON IONS
ELECTRON-ION COLLISIONS
ENERGY LOSSES
EXCITATION
MULTICHARGED IONS
TOTAL CROSS SECTIONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
ELECTRON COLLISIONS
ENERGY-LEVEL TRANSITIONS
ION COLLISIONS
IONS
LOSSES
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena