Sample of "fused earth" from first atomic bomb explosion at Alamogordo, N.M., on July 16th 1945, contained in a metal and glass holder, diameter 102mm, height 33mm Fused earth sample from first atomic bomb explosion 1945
Double clad BCF 91A wavelength-shifting optical fibre, 450mm long (approx.) x 1mm diameter, as used in output from scintillators, c1995. Double clad BCF 91A wavelength-shifting optical fibre 1990-1996
Mounted X-ray spectrograms illustrating crystal grain growth in copper due to annealing ( two mounts, 4 photos on each) Mounted X-ray spectrograms illustrating crystal grain growth in copper due to annealing
Photogaphic print and diagram, showing showing secondary beta-rays ejected from air and from a copper screen by X-rays 1920-1930
Production of a positive electron by absorption of the radiations from berylium bombarded by alpha-rays from polonium 1927-1937
Black and white photographic print showing a disintegration produced in a lead plate by cosmic rays 1935-1937
Black and white photographic print, showing a nuclear explosion due to cosmic rays, yielding three highly-ionising particles together with an electron 1936
Diagram showing apparatus for formation of helium by the accumulation of alpha-particles emitted from emanation 1920-1926
Black and white photographic print, from a negative by Pierre Auger, Paris, France, showing a compound photo-electric effect in neon 1933-1937
Photogaphic print, showing a secondary beta-ray ejected from platinum by X-rays, together with a secondary beta-ray due to platinum K-radiation 1933-1937
Photographic print, showing the formation of a new isotope of helium by bombarding heavy hydrogen with deuterons 1937
Black and white photographic print showing a cosmic ray negative electron of 1300 million volts energy 1935-1937
Stereoscopic pair of photographs showing two 'straight' cosmic-ray tracks on a single pair of photographs 1930-1937
Two photogaphic prints, showing the collision of an alpha-ray with an oxygen atom in an argon-filled expansion chamber 1922