National Institute of Standards & Technology, Acquisition & Assistance Div., Bldg. 301, Rm B117, Gaithersburg, MD 20899

66 -- HIGH RESOLUTION GONIOMETER SYSTEM FOR X-RAY DIFFRACTION SOL 52SBNB7C1112 DUE 042597 POC Contract Specialist, Kathleen Lettofsky (301)975-6342, Contracting Officer, Lisa K. Jandovitz (301)975-6342 WEB: NIST Contracts Homepage, http://www.nist.gov/admin/od/contract/contract.htm. E-MAIL: NIST Contracts Office, Contract@nist.gov. The National Institute of Standards and Technology (NIST) has a requirement for the purchase of a High Resolution Goniometer System (HRGS) for X-ray Diffraction. The HRGS shall provide high resolution angular positioning of specimens for x-ray diffraction studies. It shall include 5 rotation axes: coaxial Theta and Two-Theta, Phi(Kappa) and Kappa which form a cradle of "kappa" geometry, and a fifth axis, Phi(sample), perpendicular to Phi(Kappa) and normal to the surface of a powder specimen, as seen in figure 1 (available by fax). The Theta and Two-Theta rotation axes shall be equipped with optical encoders and shall provide 0.2 arcsec accuracy in angular positioning. The Kappa, Phi(kappa) and Phi(sample) axes will allow the sample to be rotated about the Euler angles, Phi, Chi and Omega with a sphere-of-confusion of less than 40 micrometers in diameter. The controlling hardware and software shall be capable of collecting data scans through arbitrary directions in reciprocal space and slewing to within0.5 arcsec of target angle angles in Theta and Two-Theta. Delivery required Freight on Board (FOB) destination, Gaithersburg, MD. Delivery is required 120 days after contract award. All responsible sources may submit a proposal which shall be considered. Requests of copies of the solicitation may be telefaxed to (301)963-7732. (0070)

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