from The American Heritage® Dictionary of the English Language, 4th Edition
- n. One of two or more atoms having the same atomic number but different mass numbers.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within their nuclei. As a consequence, atoms for the same isotope will have the same atomic number but a different mass number (atomic weight).
- v. To define or demonstrate an isotopy of (one map with another).
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. one of two or more atoms with the same atomic number but with different numbers of neutrons
In helium that occurs naturally the heavier isotope is more frequent than the lighter one by a factor of about 10 million.
The U-235 isotope is the all-important factor making uranium an effective fuel for electric generating plants.
As we have said, during the irradiation of heavy elements by neutrons, the neutrons are captured and incorporated in the nucleus, and an isotope is thus formed of the primary substance, and this isotope is radioactive.
This occurs in nature, although rarely; among 12,500 ordinary oxygen atoms, one oxygen isotope is found.
If the government doesn't accept the recommendation to build a new reactor, the other options to secure a long-term isotope supply will have to be revisited, the report said.
The primary by-product of enrichment is depleted uranium (DU), principally the U-238 isotope, which is stored either as UF6 or U3O8.
The half-life of an isotope is the amount of time it takes for half of its atoms to decay.
The isotope, which is extremely hazardous, was en route to
We look forward to working with the Government to create a solution to Canada's long term isotope needs, "comments Lloyd Scott, President of Iotron Industries.
The ratios make their way into people's hair when they drink the local water, and can be measured using a machine called an isotope ratio mass spectrometer.