Dr Masatoshi Koshiba

Dr Masatoshi Koshiba

H411/0015 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 25.3MB

Downloadable file size: 1.6MB

Price image Pricing

Please login to use the price calculator


Credit: PETER MENZEL/SCIENCE PHOTO LIBRARY

Caption: Dr. Masatoshi Koshiba, director of Tokyo University's Proton Decay Experiment. The experiment consists of a 12 metre tank filled with 9,000 tonnes of water and lined with 1,000 50 centimetre photomultiplier tubes. The proton's half life is estimated at 10 to the power 34 years, so the water must contain enough protons to provide an average of one decay event per year, an event which may be detected by the tubes as the particles from the decay cause a visible light phenomenon known as Cerenkov radiation. The experiment is taking place 914 metres underground in a zinc mine below Mt. Ikenoyama to minimise the effects of cosmic rays.

Release details: Model release not available. Property release not required.

Keywords: dr. masatoshi, kamioka proton decay expt., koshiba, physicist, portraits, proton decay physicist, surname k

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.