In Physics Collection

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 Powells team at Bristol University in 1948

High-energy cosmic ray collision
A very high-energy cosmic ray iron nucleus shoots into some photographic emulsion & collides with a silver or bromine nucleus in the emulsion to produce a tremendous " jet" of about 850

Emulsion photo of a cosmic ray pion
Emulsion photograph showing the birth & death of a cosmic ray pion (or pi-meson). A primary cosmic ray has struck & shattered an atomic nucleus to form the " star" at the bottom of

High-energy cosmic ray
A very high-energy cosmic ray iron nucleus shoots into some photographic emulsion & collides with a silver or bromine nucleus in the emulsion to produce a tremendous " jet" of about 850

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

Radioactive emission from radium
Radium alpha particles. Coloured image of the radioactive emission of alpha particles from radium. A speck of radium salt was placed on a special emulsion on a photographic plate; when developed

Pion-muon-electron (pi-mu-e) decay chain
Emulsion photograph showing the classic pion-muon- electron (pi-mu-e) decay chain of a charged cosmic ray pion. The pion enters the picture at top left; it soon decays to a muon

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