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Resonantly excited high-density exciton gas studiedvia broadbandTHz spectroscopy

Description: We report the density-dependent crossover of a resonantly photoexcited exciton gas from insulating to conducting phases. Broadband terahertz spectroscopy gives direct access to the exciton binding energy via intra-excitonic 1s-2p transitions. A strong shift, broadening, and ultimately the disappearance of this resonance occurs with decreasing inter-particle distance. Densities of excitons and unbound electron-hole pairs are followed quantitatively using a model of the composite free-carrier and… more
Date: June 25, 2005
Creator: Huber, Rupert; Kaindl, Robert A.; Schmid, Ben A. & Chemla, Daniel S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Chemistry of Actinides in Molten Glasses and Its Correlation to Structural Performance of Solid Glasses: Filling the Knowledge Gap (Project 81926)

Description: This proposal focuses on the following basic objectives to generate critical information for the following research Needs: (a) to conduct spectroscopic speciation of uranium compounds in glass forming melts as a function of the acid-base composition of the glasses and melt temperatures, and to use these data to develop a general thermodynamic model for the dissolution of actinide species in oxidic glass matrices, (b) to build a scientific basis for a new methodology to measure the basicity of g… more
Date: June 25, 2005
Creator: Dai, Sheng; Boatner, Lynn & Schumacher, Ray F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

DATA QUALIFICATION REPORT: DATA QUALIFICATION REPORT FOR 1991 1:1200 TOPOGRAPHIC MAPS FOR USE ON THE YUCCA MOUNTAIN PROJECT

Description: This Data Qualification Report (DQR) is prepared in accordance with the provisions of AP-SIII.2Q, Rev. 0, ICN 3, Qualification of Unqualified Data and the Documentation of Rationale for Accepted Data and Data Qualification Plan for 1991 Topographic Maps 1:1200 Scale for use on the Yucca Mountain Project, DQP-WHS-CI-000001, Rev. 00 (BSC 2002a). This DQR presents an evaluation of a set of 90 topographic sheets at 1:1200 scale (and an associated electronic file) that covers an approximate 18 squar… more
Date: June 25, 2005
Creator: Knop, M.F.; Grant, T.A. & Bonisolli, R.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

STRATIGRAPHY OF THE PB-1 WELL, NOPAL I URANIUM DEPOSIT, SIERRA PENA BLANCA, CHIHUAHUA, MEXICO

Description: Three wells, PB-1, PB-2, and PB-3, were drilled in 2003 at the Nopal I uranium deposit as part of a natural analogue study to evaluate radionuclide transport processes. The wells penetrate through the Tertiary volcanic section down to the Cretaceous limestone basement, and intersect the top of the regional aquifer system. The PB-1 well, drilled immediately adjacent to the Nopal I ore body, was cored to a depth of 250 m, thus providing an opportunity to document the local stratigraphy. The upper… more
Date: June 25, 2005
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Letter To Commissioners From SEN J. Kissel, REP R. Ferrari, REP R. Fahrbach, and REP P. Sayers (from CT General Assembly)

Description: Executive Correspondence (9 letters): Letter to Chairman Principi, Commissioners Turner, Coyle, Hansen, Skinner, Hill, Bilbray, Gehman, and Newton, from SEN John Kissel, REP Richard Ferrari, REP Ruty Fahrbach, and REP Peggy Sayers (from Connecticut General Assembly) regarding the 118th Fighter Squadron of the 103rd Fighter Wing.
Date: June 25, 2005
Item Type: Refine your search to only Letter
Partner: UNT Libraries Government Documents Department
open access

Letter from Mr. Charles Battaglia to Major General Roger Lempke dtd 14 June 2005

Description: Executive Correspondence - Letter from Executive Director Charles Battaglia to Major General Roger Lempke in response to a letter with DCN 2968, and an invitation to attend a hearing in Georgia Tech Hotel and conference center.
Date: June 25, 2005
Creator: United States. Defense Base Closure and Realignment Commission.
Item Type: Refine your search to only Letter
Partner: UNT Libraries Government Documents Department
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