Department of Commerce, Mountain Administrative Support Center, Procurement Division, MC3, 325 Broadway, Boulder, CO 80303-3328

66 -- GONIOMETER FOR LASER LIGHT SCATTERING SOL 838-5-3033mb DUE 072095 POC Michelle A. Bernal, (303) 497-3983 The National Institute of Standards and Technology (NIST) requires one Goniometer for laser light scattering with the following features: 1) The instrument must be controllable from the software interface provided for a BI-9000 digital autocorrelator. The BI-9000 is an instrument already in our laboratory and it is imperative that the purchased goniometer be completely compatible with this instrument. 2) The ability to detect quasi-elastically scattered laser light over at least 40 angles in the range from 8 to 160 degrees relative to the incident beam direction with an angular resolution of at least .01 degrees at any given angle. 3) The instrument must have optics to collect light for either autocorrelation spectroscopy or static light scattering measurements at all accessible angles. 4) A temperature controlled environment for the light scattering samples must be provided which allows for active temperature control during light scattering measurements and can operate in the temperature range from 0-150 degrees centigrade. A digital interface and readout to the temperature control system must also be provided with the instrument. 5) Collection optics must be able to select either 488nm, 514nm or 632.8nm light for either autocorrelation spectroscopy or static light scattering measurements. 6) Incident beam optics and mounts for proper beam collimation for an externally supplied laser beam. 7) If an index matching fluid scheme is provided in order to meet the above specifications then a filtration system for this fluid must also be provided. 8) At least four high quality, very low surface scatter quartz light scattering cells must be provided as part of the system (Quality must meet specs. of a Hellma 540.114- QS light scattering cell. Refer to Hellma Cells Inc., Box 544, Borough Hall Station, Jamaica, N.Y. 11424, Ph:(718)544-9534). 9) At least 100 Borosilicate light scattering cells must also be provided. Interested sources proposing to supply an equivalent unit must submit a written qualification statement clearly establishing capability to meet the above requirements within 30 days from the date of this synopsis. In the absence of other qualified sources, it is the intent of the Government to award a sole source contract under the authority of 41 U.S.C. 253(c)(1) to Brookhaven Instrument Corporation, Brookhaven Corporate Park, 750 Blue Point Road, Holtsville, NY 11742-1832 as this source is considered to be the only responsible source and no other type of supplies will satisfy agency requirements. (0170)

Loren Data Corp. http://www.ld.com (SYN# 0342 19950620\66-0019.SOL)