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
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
Black and white photographic print, from a negative by Pierre Auger, Paris, France, showing a compound photo-electric effect in neon 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
Black and white photographic print, showing the track of a cosmic ray passing through a lead plate 5 mm thick 1933-1937
Black and white cloud track photographic print, showing the artificial disintegration of lithium by high-speed protons 1933-1937
Black and white photographic print, showing the production of a pair of electrons, positive and negative 1934-1937
Black and white photographic print, showing the track of a proton projected by a neutron from beryllium bombarded by alpha-rays from polonium, in a magnetic field of 8000 gauss 1933-1937
Black and white photographic print, showing a long range alpha-particle of range 9.5 cm from thorium C and C1 1933-1937
Black and white photographic print, diagram and display label, showing the production of electron pairs in krypton gas 1936-1937
Diagram of Joseph John Thomson's method of measuring electromagnet for thermo-electrons (1899) 1945-1948