Experimental study of interactions of highly charged ions with atoms at keV energies

Technical Report · Tue Jul 02 04:00:00 EDT 1991

OSTI ID:5311534

Kostroun, V O

This Progress Report describes the experimental work carried out, and the work in progress, at the Cornell EBIS Laboratory during the period 2/16/1990 to 6/30/1991. During this period, the absolute values of the total, one and two electron transfer cross sections for highly charged argon ions (8{le}q{le}16) colliding with helium and molecular hydrogen at 2.3 qkeV laboratory energy were measured. Although the cross sections exhibit a monotonic increase with charge or in this case with decreasing occupation number of the L shell, the detailed variations are not accounted for by current theories. These measurements are currently being extended down to 0.1 qkeV incident ion energies. In order to gain a better understanding of two and more electron capture processes, electron-recoil ion and projectile-recoil ion coincidence experiments are under way. The spectra of electrons emitted in Ar{sup q+}+Ar(12{le}q{le}15) collisions at 2.3 qkeV in the energy range 40--320 eV were recorded using a 127{degrees} cylindrical analyzer. These are the first electron spectra ever obtained using an EBIS as a source of low energy, highly charged ions The fact that we were able to obtain such spectra can be attributed to the remarkably stability and reliability of our superconducting solenoid, cryogenic electron beam ions source CEBIS. Work is in progress to extend the spectral range of electrons down to a few eV and to interpret all of the observed spectral features.

• Research Organization: Cornell Univ., Ithaca, NY (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-86ER13519
• OSTI ID: 5311534
• Report Number(s): DOE/ER/13519-5; ON: DE91016962
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON IONS
ATOM COLLISIONS
CAPTURE
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DOCUMENT TYPES
ELECTRON BEAM ION SOURCES
ELECTRON CAPTURE
ELECTRON SPECTRA
ELECTRON TRANSFER
ELEMENTS
FLUIDS
GASES
HELIUM
HYDROGEN
ION COLLISIONS
ION SOURCES
ION-ATOM COLLISIONS
ION-MOLECULE COLLISIONS
IONS
MOLECULE COLLISIONS
MULTICHARGED IONS
NONMETALS
PROGRESS REPORT
RARE GASES
SPECTRA
SUPERCONDUCTING COILS