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66 -- POSITION-SENSITIVE NEUTRON PROPORTIONAL COUNTER AND DATA ACQUISITION SYSTEM SOL 40SBNB860076 DUE 062499 POC Paul Cataldo (301)975-6332/C.O. Pauline Mallgrave (301)975-6330 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) proposes to modify order no. 40SBNB860076 awarded on September 24, 1998 to ORDELA, Inc., 1009 Alvin Weinberg Drive, Oak Ridge, TN 37830 for the purchase of a Model 2660N Position-Sensitive Neutron Proportional Counter with Data Acquisition System and 8mm total window thickness option. The proposed modification would increase the quantity from one (1) each to two (2) each. The Government intends to solicit one source under the authority of 41 U.S.C. 253 ( c ) (1), "Only One Responsible Source," because ORDELA, Inc. is the only supplier that can meet the following: Performance Requirements: Spatial Resolution: 0.5 cm x 0.5 cm, full-width at half-maximum (FWHM) and Detection Efficiency: 80% for 0.5 nm neutrons, 65% for 0.3, 50% for 0.2; Physical Specification: Overall Dimensions: <122 cm diameter, <85 cm high; and in addition, to be interchangeable with two other ORDELA Model 2660N's, one of which is currently in use in one of the 30 m Small-Angle Neutron Scattering (SANS) instruments at NIST's Center for Neutron Research (NCNR), and the other to be installed on the NCNR's other 30 m SANS instrument later this year. This notice of intent is not a request for competitive proposals. However, the Government will consider all proposals received within 7 days after the date of publication of this synopsis. A determination by the Government not to compete this proposed modification based upon responses to this notice is solely within the discretion of the Government. Information received will normally be considered solely for the purpose of determining whether to conduct a competitive procurement. Written responses shall contain sufficient documentation to establish a bonafide capability to fulfill the requirement. A solicitation is not available. Posted 06/21/99 (W-SN345128). (0172)

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