Time to trap an ytterbium ion
Article Abstract:
The detection of a new atomic transition sets the potential for an optical clock that is more than 1,000 times accurate. To be a candidate for an optical frequency standard, an ion must have a long-lived level and the photon wavelength produced by the transition between this long-lived level and the ground state must be accessible to continuous-wave lasers. The rare-earth metal ytterbium's two potentially suitable transitions at 411 and 435 nanometers have already been observed. The recent observation of the transition at 467 nanometers of ytterbium set the scene for the narrowest spectral line available in locating more precise clock transition.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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Latent pigments activated by heat
Article Abstract:
Scientists have developed a technique to create an organic pigment that is easy to prepare and readily available for industrial use. The method of production, using N,N'-bis(t-butoxycarbonyl)-DPP, is described. The technique involves the homogenous distribution of organic pigment nanoparticles and is suited for use in high-performance organic pigment products.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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