Photograph of a neutrino interaction event in the 15- foot bubble chamber at the Fermi National Accelerator Laboratory (Fermilab) near Chicago. The neutrino enters the bubble chamber at far right, but does not leave a track itself because it is electrically neutral. It interacts almost immediately with a proton in the liquid filling the bubble chamber, producing a spray of particles that travel towards the left, curving in the chamber's magnetic field. The V- shaped pairs of tracks in the lower half of the picture, which end in characteristic spiral curlicues, are electron- positron pairs produced from gamma-rays.
px | px | dpi | = | cm | x | cm | = | MB |
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Creative#:
TOP10162570
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達志影像
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RM
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