Developing optical traps for ultra-sensitive analysis

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The authors describe the coupling of a magneto-optical trap to a mass separator for the ultra-sensitive detection of selected radioactive species. As a proof of principle test, they have demonstrated the trapping of {approximately} 6 million {sup 82} Rb (t{sub 1/2} = 75 s) atoms using an ion implantation and heated foil release method for introducing the sample into a trapping cell with minimal gas loading. Gamma-ray counting techniques were used to determine the efficiencies of each step in the process. By far the weakest step in the process is the efficiency of the optical trap itself (0.3%). Further improvements ... continued below

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8 p.

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Zhao, X.; Vieira, D.J.; Guckert, R. & Crane, S. September 1, 1998.

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Description

The authors describe the coupling of a magneto-optical trap to a mass separator for the ultra-sensitive detection of selected radioactive species. As a proof of principle test, they have demonstrated the trapping of {approximately} 6 million {sup 82} Rb (t{sub 1/2} = 75 s) atoms using an ion implantation and heated foil release method for introducing the sample into a trapping cell with minimal gas loading. Gamma-ray counting techniques were used to determine the efficiencies of each step in the process. By far the weakest step in the process is the efficiency of the optical trap itself (0.3%). Further improvements in the quality of the nonstick dryfilm coating on the inside of the trapping cell and the possible use of larger diameter laser beams are indicated. In the presence of a large background of scattered light, this initial work achieved a detection sensitivity of {approximately} 4,000 trapped atoms. Improved detection schemes using a pulsed trap and gated photon detection method are outlined. Application of this technology to the areas of environmental monitoring and nuclear proliferation are foreseen.

Physical Description

8 p.

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INIS; OSTI as DE98006295

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  • BIOS `98: an international symposium on biomedical optics, San Jose, CA (United States), 24-30 Jan 1998

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  • Other: DE98006295
  • Report No.: LA-UR--98-1093
  • Report No.: CONF-980117--
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 674726
  • Archival Resource Key: ark:/67531/metadc709875

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  • September 1, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • Feb. 25, 2016, 3:51 p.m.

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Zhao, X.; Vieira, D.J.; Guckert, R. & Crane, S. Developing optical traps for ultra-sensitive analysis, article, September 1, 1998; New Mexico. (digital.library.unt.edu/ark:/67531/metadc709875/: accessed September 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.