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A Little
History...
Way back in 1903, Sir William Crookes was experimenting with the most expensive
material on Earth at the time... Radium Bromide.
Working in total darkness, he accidentally spilled a small quantity on a thin
layer of a special type of activated Zinc Sulfide (ZnS). To make sure he
recovered all of the expensive Radium Bromide, he used a magnifying lens to
locate every single speck of it. To his amazement, he noticed flashes of light
occurring around each tiny grain of the radioactive material. It was found that
the flashes of light were caused by the individual Alpha particles emitted from
the Radium compound, striking the activated Zinc Sulfide. The flashes of light
were individual photons emitted from splitting atoms.
Crookes was
indirectly able too 'see' radiation via the light flashes. Shortly
thereafter, he assembled a small apparatus with a tiny radioactive
Radium source, Zinc Sulfide screen, and magnifying lens.
He called the device a ' Spinthariscope '.
The Spinthariscope can be considered the first radiation detector.
Spinthariscopes were popular items back in their day but they have long
since disappeared and been forgotten. In the mid 1990s, United Nuclear
Scientific designed a new Spinthariscope using modern materials and
essentially brought the classic Spinthariscope back to life.
Our Spinthariscopes do not contain any dangerous Radium Bromide. Instead,
they contain a
tiny speck of extremely high grade
Thorium ore, specially mined & imported
for us from the Great Bear Lake in Canada. The high Thorium content
makes this Canadian ore very unique in its chemical composition, and is the only natural occurring radioactive material that will put on
the dazzling nuclear display you see in the Spinthariscope.
The small speck of radioactive material is permanently sealed within the device and does not pose any health or radiation risk.
The tiny radioactive source is encased in a metal tab and permanently
bonded within the unit. The target material is a special "activated" blend of
ZnS that we manufacture ourselves - sealed
under clear plastic.
As the source material undergoes natural radioactive decay, atoms of it continuously explode, releasing Alpha Particles traveling at over 20,000 miles per hour.
Even at this high speed Alpha particles can only travel a little over an inch in the air.... and can't even penetrate a sheet of
paper.
They can however hit the ZnS target suspended directly above the
source. When an Alpha Particle hits the ZnS target, it releases a
photon, the basic component of light. This produces the thousands of tiny flashes (scintillations) of blue-white light you see through the magnifying lens.
Alpha radiation (Alpha particles) are just common Helium atoms that have lost their
electrons and are traveling at very high speed.
The Nuclear Spinthariscope features an adjustable focus, requires no batteries or any other form of energy, and will continue to
operate producing tiny visible nuclear explosions for at least 60 years.
The Nuclear
Spinthariscope
Each Spinthariscope is individually handmade
and assembled by our craftsman.
Fabricated
from cast aluminum & high-impact plastic,
the handheld Nuclear Spinthariscope is
quite sturdy.
Special pricing is available to
schools, museum shops, and other learning institutions.
Please email us for
details.
Although it contains a very
tiny amount of radioactive material sealed inside,
it is completely safe for
both children & adults to use.
Nuclear Spinthariscope: $30.00
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Super Spinthariscope 
