Word: tracked
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Dates: during 1960-1969
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Last year, Walker and another colleague discovered what may prove to be an even more sensitive dating method-the measurement of alpha-particle tracks. Uranium nuclei frequently emit an alpha particle. As the particle is expelled, the nucleus recoils. Walker reasoned that "recoil tracks would be there, so I looked for them." He discovered that observable recoil tracks occurred 4,000 times more than fission tracks. When acid etching and track counting are perfected for alpha particles, the method should provide a means of dating infinitesimally small objects and those too young to have accumulated measurable amounts of fission tracks...
...WIDE WORLD OF SPORTS (ABC, 5-6:30 p.m.). Highlights of the swimming and track-and-field events at the Pan American games, live from Winnipeg, Canada...
...stimulating, clapped loudly after every scene. As for a much-publicized urination scene -one reason why the mayor of St. Tropez had prohibited the performance in his town-it was, all things considered, a model of discretion: Tart squatted in the middle of the stage while the sound track made appropriate noises. "We had to keep that scene," says Lebel. "We're not at liberty to emasculate a work of art in order to pander to bourgeois sentiment." Still, he would have felt better if there had been just a few cries of moral outrage on opening night...
...factories running at 84.7% of capacity, the lowest figure in three years. "The recovery is not going to be as prompt and vigorous as we thought," says a senior Federal Reserve Board economist. To the White House Council of Economic Advisers, the rebound looks "very satisfying-right on track." Taking a middling view, Treasury Under Secretary Joseph Barr said: "The economy is following our blueprint, but it is about two months behind where we thought it would...
False shadows turn to track me as I pass...