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Level Density and Strength Function from Quasicontinuous Decay of Superdeformed Excitations in Lead Nuclei

Description: The shape of the spectrum associated with the quasicontinuous (QC) decay of superdeformed rotational bands in even- and odd-mass Pb isotopes is sensitive to the gap in level density at finite temperature and angular momentum at normal deformations. This gap in level density was deduced to be {approx}0.95 MeV at 6{Dirac_h} for {sup 194}Pb and {approx}0.4 MeV at 10{Dirac_h} for {sup 192}Pb, while the shape of the QC spectrum for {sup 195}Pb is consistent with no gap in the level density at about … more
Date: October 4, 2002
Creator: Cizewski, J A; Johnson, M & McNabb, D P
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Simulation of chamber transport for heavy-ion fusion

Description: Beams for heavy-ion fusion (HIF) are expected to require substantial neutralization in a target chamber. Present targets call for higher beam currents and smaller focal spots than most earlier designs, leading to high space-charge fields. Collisional stripping by the background gas expected in the chamber further increases the beam charge. Simulations with no electron sources other than beam stripping and background-gas ionization show an acceptable focal spot only for high ion energies or for … more
Date: October 4, 2002
Creator: Sharp, W. M.; Callahan, D. A.; Tabak, M. A.; Yu, S. S.; Peterson, P. F.; Rose, D. V. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ESC FY2002 Annual Report: Synchrotron-Radiation-Based Photoelectron Spectroscopy at the Advanced Light Source

Description: Despite recent intensive experimental effort, the electronic structure of Pu, particularly {delta}-Pu, remains ill defined. An evaluation of our previous synchrotron-radiation-based investigation of {alpha}-Pu and {delta}-Pu has lead to a new paradigm for the interpretation of photoemission spectra of U, Np, {alpha}-Pu, {delta}-Pu and Am. This approach is founded upon a model in which spin and spin-orbit splittings are included in the picture of the 5f states and upon the observation of chiral/… more
Date: October 4, 2002
Creator: Tobin, J G; Chung, B W; Schulze, R K & Shuh, D K
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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