Fred Schlachter - Academia.edu (original) (raw)
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![Research paper thumbnail of Double electron transitions [MN] or [MO] above 74W M III edge in X-ray absorption spectra](https://attachments.academia-assets.com/116747538/thumbnails/1.jpg)
](Journal of Synchrotron Radiation, 2001
The X-ray absorption spectra in metallic W (tungsten) have been measured above M III edge using t... more The X-ray absorption spectra in metallic W (tungsten) have been measured above M III edge using the third generation synchrotron radiation, ALS, Berkeley. Several features caused by multi-electron transitions were detected on M III in solid phase. [3p4f], [3p5s], and [3p5p] double electron transitions were identified by the Z+1 approximation.
OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information), 1996
Physical Review A, Sep 16, 2005
The Journal of Undergraduate Research, 2003
Photoionization of Fe3+ ions was studied for the first time using synchrotron radiation from the ... more Photoionization of Fe3+ ions was studied for the first time using synchrotron radiation from the Advanced Light Source (ALS) and the merged-beams technique. Fe3+ ions were successfully produced using ferrocene in an electron cyclotron resonance ion source (ECR). The measured yield of Fe4+ photoions as a function of photon energy revealed the presence of resonances that correspond to excitation of autoionizing states. These resonances are superimposed upon the photoion yield produced by direct photoionization, which is a smooth, slowly decreasing function of energy. The spectra for the photoionization of Fe3+ will be analyzed and compared with theory. The data collected will also serve to test models for the propagation of light through ionized matter.
Reviews of Modern Physics, Dec 30, 2008
Acta Physica Polonica A, 1997
Chemical Physics Letters, 2012
Chemical Physics Letters, 2012
Cross sections for projectile loss and excitation (LE) in single collisions of heavy ions with at... more Cross sections for projectile loss and excitation (LE) in single collisions of heavy ions with atoms have been measured for 15 to 460 MeV S, Ar, Ca, and V ions, with charge states varying from 12+ to 21+ in H/sub 2/, He, Ne, and Ar gas targets. The results indicate that K x-ray production takes place through excitation rather than loss of a 1s electron. An independent electron model appears to provide a reasonable description of LE for Li-like projectiles. However, there are also indications that loss and excitation events are correlated. 11 refs., 4 figs.
IEEE Transactions on Nuclear Science, 1983
IEEE Transactions on Nuclear Science, 1981
Anion Formation Moderated by Post Collision Interaction Following Core-Level Photofragmentation
Author(s): Schlachter, Fred | Abstract: Statistical properties of the spacing between neighboring... more Author(s): Schlachter, Fred | Abstract: Statistical properties of the spacing between neighboring energy levels in doubly excited autoionizing states of the helium atom display a transition towards quantum chaos.
A storage ring is a specialized synchrotron in which a stored beam of relativistic electrons prod... more A storage ring is a specialized synchrotron in which a stored beam of relativistic electrons produces radiation in the vuv and x-ray regions of the spectrum. High-brightness radiation is used at the ALS to study doubly excited autoionizing states of the helium atom in the search for quantum chaos.
Journal of Synchrotron Radiation, 2001
The X-ray absorption spectra in metallic W (tungsten) have been measured above M III edge using t... more The X-ray absorption spectra in metallic W (tungsten) have been measured above M III edge using the third generation synchrotron radiation, ALS, Berkeley. Several features caused by multi-electron transitions were detected on M III in solid phase. [3p4f], [3p5s], and [3p5p] double electron transitions were identified by the Z+1 approximation.
OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information), 1996
Physical Review A, Sep 16, 2005
The Journal of Undergraduate Research, 2003
Photoionization of Fe3+ ions was studied for the first time using synchrotron radiation from the ... more Photoionization of Fe3+ ions was studied for the first time using synchrotron radiation from the Advanced Light Source (ALS) and the merged-beams technique. Fe3+ ions were successfully produced using ferrocene in an electron cyclotron resonance ion source (ECR). The measured yield of Fe4+ photoions as a function of photon energy revealed the presence of resonances that correspond to excitation of autoionizing states. These resonances are superimposed upon the photoion yield produced by direct photoionization, which is a smooth, slowly decreasing function of energy. The spectra for the photoionization of Fe3+ will be analyzed and compared with theory. The data collected will also serve to test models for the propagation of light through ionized matter.
Reviews of Modern Physics, Dec 30, 2008
Acta Physica Polonica A, 1997
Chemical Physics Letters, 2012
Chemical Physics Letters, 2012
Cross sections for projectile loss and excitation (LE) in single collisions of heavy ions with at... more Cross sections for projectile loss and excitation (LE) in single collisions of heavy ions with atoms have been measured for 15 to 460 MeV S, Ar, Ca, and V ions, with charge states varying from 12+ to 21+ in H/sub 2/, He, Ne, and Ar gas targets. The results indicate that K x-ray production takes place through excitation rather than loss of a 1s electron. An independent electron model appears to provide a reasonable description of LE for Li-like projectiles. However, there are also indications that loss and excitation events are correlated. 11 refs., 4 figs.
IEEE Transactions on Nuclear Science, 1983
IEEE Transactions on Nuclear Science, 1981
Anion Formation Moderated by Post Collision Interaction Following Core-Level Photofragmentation
Author(s): Schlachter, Fred | Abstract: Statistical properties of the spacing between neighboring... more Author(s): Schlachter, Fred | Abstract: Statistical properties of the spacing between neighboring energy levels in doubly excited autoionizing states of the helium atom display a transition towards quantum chaos.
A storage ring is a specialized synchrotron in which a stored beam of relativistic electrons prod... more A storage ring is a specialized synchrotron in which a stored beam of relativistic electrons produces radiation in the vuv and x-ray regions of the spectrum. High-brightness radiation is used at the ALS to study doubly excited autoionizing states of the helium atom in the search for quantum chaos.