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August Gallery

Available as Framed Photos, Photos, Wall Art and Gift Items

Choose from 15 pictures in our August collection for your Wall Art or Photo Gift. Popular choices include Framed Photos, Canvas Prints, Posters and Jigsaw Puzzles. All professionally made for quick delivery.


Emulsion photo of decay of kaon into pions Featured August Print

Emulsion photo of decay of kaon into pions

The first observation of the decay of a kaon into 3 pions, recorded in special photographic emulsion by Cecil Powell's team at Bristol University in 1948. The kaon produces the dense track coming in from top right. It decays at A into 3 pions. One of the pions moves away slowly, leaving a dense track, & then interacts at B. The other 2 pions are faster & leave relatively faint tracks as they move off in opposite directions towards top right & bottom left. (The distance between A & B is 25 micrometres). The kaon was the first discovered member of the family of "strange" particles, which contain a strange quark

© C. POWELL, P. FOWLER & D. PERKINS/SCIENCE PHOTO LIBRARY

cosmic ray atomic nuclei Featured August Print

cosmic ray atomic nuclei

Emulsion photograph showing the tracks of various cosmic ray nuclei, ranging from a hydrogen nucleus to an iron nucleus. The more protons a nucleus contains, the higher its positive electric charge & the greater its ability to ionise; the more it ionises, the denser its track in emulsion. Hydrog- en has 1 proton & produces a barely visible track. Ionisation depends on the square of the charge; so lithium's 3 protons have 9 times hydrogen's charge & produce a track 9 times denser. Iron, with 26 protons, produces a track 676 times denser than hydrogen. The wispy strands that adorn the denser tracks are "delta rays" - electrons knocked out of atoms in the emulsion by the passing nucleus

© POWELL FOWLER PERKINS/SCIENCE PHOTO LIBRARY