DOC; Mountain Administrative Support Center; Acquisition Management Division; 325 Broadway MC3; Boulder, CO

R -- RESEARCH PROJECT POC Michelle A. Bernal, 303-497-3983, Fax:303-497-3163 E-MAIL: NOAA; MASC Acquisition Management, Michelle.A.Bernal@noaa.gov. The National Institute of Standards & Technology (NIST), Electromagnetic Technology Division, Superconductor Interfaces and Transport Measurement Group, proposes to negotiate on a sole source basis under authority of 41 U.S.C. 253(c)(1) with Dr. Yizi Xu for work on NIST's High-Temperature Superconductor Interface Resistance Noise-Project involving the measurement and characterization of low-frequency noise of high-temperature superconductor/noble-metal junction interfaces. Specific tasks will include: (1) Systematic measurements of low-frequency noise in high-temperature superconductor YBCO/Au junctions; (2) analysis of available data on transport and noise behavior; (3) development of models for interface transport mechanism to explain the transport data of YBCO/Au junctions; (4) analysis of noise data with the model; and (5) fabrication of YBCO/Au ramp- edge junctions with tunneling along the ab-plane of YBCO and systematic characterization of the transport and noise properties of the ramp-edge junctions. This work will be a continuation of the research in progress which Dr. Xu began as a postdoc in the Professional Research Experience Program at NIST and the University of Colorado. Successful completion of the project requires a strong background in the general theory of superconductivity, electron tunneling and hopping via localized states in amorphous silicon, high-temperature superconductors and their interfaces, and Lab VIEW programming. This procurement is being conducted pursuant to Simplified Acquisition Procedures. Terms and Conditions and agency level protest procedures can be found on web site http: netsite.esa.doc.gov/oam/conops/#REFERENCE. Hard copy in full text available from office address and phone number listed in notice. No solicitation is planned. Curriculum vitae submitted in response to this notice will be evaluated only to determine whether or not full and open competition would be in the best interest of the Government. Anticipated award date is October 26, 1998. Posted 10/09/98 (D-SN260898). (0282)

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