Measurements of the Properties of Highly-charged high-Z ions

Augustine J. Smith, Ph.D.

Morehouse College

关键词: Lawrence Livermore National Laboratory;    Training Highly-Charged High-Z Ions, Electron Impact Excitation Cross Sections, Polarization, X-Ray Emmission;    Electron Beams;    Quantum Electrodynamics;    Nuclear Properties;   

DOI  :  10.2172/901632
RP-ID  :  DE-FG02-98ER14877
RP-ID  :  FG02-98ER14877
RP-ID  :  901632

美国|英语

来源: UNT Digital Library

【 摘 要 】

We had proposed carrying out a systematic experimental investigation of the atomic physics of highly charged, high-Z ions, produced in the Lawrence Livermore National Laboratory (LLNL) electron beam ion trap (EBIT-I) in its high energy mode, superEBIT. In particular we were going to accurately measure line positions for Δn=0 transitions in few electron high-Z ions; this was meant to enable us to investigate relativistic and quantum electrodynamics QED contributions to the energy levels as well as the nuclear properties of heavy ions. We were also going to measure cross sections for various electron-ion interactions, the degree of polarization of emitted x-rays, and radiation cooling rates of various ionization stages of highly charged, high-Z ions. This would enable us to study fundamental atomic physics of high-Z ions at relativistic electron impact energies and in the intense nuclear fields of highly ionized, high-Z ions. This would extend previous measurements we have carried out to a regime where there is a paucity of good data. These measurements were expected to generate increased theoretical interest and activity in this area. The project will extend a very successful collaboration between Morehouse College (MC) and a national laboratory LLNL, Minority student training and development are major components of the proposal.