Isotopic radioactive isotopes have unstable ratios. Medical search. Frequent questions

The radioactivity of each uranium isotope in 1 �g of either natural or depleted uranium is shown in Table 1.1. (health.mil)

Activation-- The process of making a material radioactive by bombardment with neutrons or protons. (cdc.gov)
On the other hand, nuclei with an odd number of protons and neutrons are mostly unstable. (nuclear-power.com)
It is needed to find the ratio of neutrons to protons to identify the stability of an isotope. (nuclear-power.com)
As a result, as the number of protons increases, an increasing ratio of neutrons to protons is needed to form a stable nucleus. (nuclear-power.com)
If there are too many or too few neutrons for a given number of protons, the resulting nucleus is not stable and undergoes radioactive decay . (nuclear-power.com)
The ratio of protons to neutrons is important in determining the stability of elements. (citizendium.org)
Most isotopes discovered on Earth are secure, which means they don't change their composition of protons and neutrons regardless of time or environmental conditions. (gicjo.net)
There are 144 Neutrons and 94 Protons in the Plutonium-238 isotope. (chemistrylearner.com)
However, all superheavy elements synthesised in a laboratory are neutron-poor elements, with the number of neutrons being significantly smaller than required to make the most stable isotopes. (arxiv-vanity.com)
Therefore, the very large number of neutrons, N = 184 , needed for a more stable superheavy element, cannot be obtained by colliding any pair of lighter elements where the N / Z ratio is smaller than that in the island of stabiltiy. (arxiv-vanity.com)
The nickel immediately absorbs these neutrons, making it unstable. (veteranstoday.com)
Whereas fast neutrons create one hell of a mess when they collide with the nuclei of other atoms, LENR's slow neutrons don't generate ionizing radiation or radioactive waste. (veteranstoday.com)

Alpha Particle-- A positively charged particle ejected spontaneously from the nuclei of some radioactive elements. (cdc.gov)
Radioactivity is a phenomenon produced in certain unstable atoms in which nuclei transform by emitting particles and/or electromagnetic radiation. (turboscholarship.com)
DECAY CONSTANT For a radionuclide , the probability l for the nuclear decay of one of its nuclei in unit time, i.e., the rate constant for radioactive decay, a first order reaction. (radiochemistry.org)
Certain radioactive nuclei emit alpha particles. (cdc.gov)
Most terrestrial E939 (Helium) present today is created by the natural radioactive decay of heavy radioactive elements (thorium and uranium, although there are other examples), as the alpha particles emitted by such decays consist of E939 (Helium)-4 nuclei. (atamanchemicals.com)
To identify spectra of the N = 184 isotopes of these nuclei and their neutron-reach superheavy decay products in astrophysical data we calculate the isotope shift which should be added to the laboratory - measured wavelenghs. (arxiv-vanity.com)

This gives these atoms, called isotopes or isotopologues, a different atomic mass. (ikaahukarchaeologyproject.com)
it is conceivable that, for a very short time period (e.g. 10ˆ-18 sec), a series of neutral mini atoms of hydrogen could be formed, in an unstable state , of various size and energy level, distributed within the Fermi band, which is enlarged due to the very short time (Heisenberg). (journal-of-nuclear-physics.com)
the rate of decay of radioactive material expressed as the number of atoms breaking down per second measured in units called becquerels or curies . (cdc.gov)
Atoms of the same atomic number but different atomic weights are called isotopes. (uga.edu)
The atomic mass number determines especially the atomic mass of atoms, and the mass number is different for each different isotope of a chemical element. (nuclear-power.com)
Radiation, which is a byproduct of radioactive decay, causes electrons to dislodge from their normal position in atoms and turn into trapped in imperfections in the crystal structure of the fabric. (gicjo.net)

Ratios of stable lead isotopes may also be utilized to identify and trace different sources of lead in the environment. (turboscholarship.com)
This technique is certainly one of a family of strategies that use a number of, completely different unstable uranium isotopes that decay into stable lead isotopes by totally different chemical pathways. (gicjo.net)

Cesium-133, on the other hand, is the stable, naturally occurring isotope at 100% isotopic abundance. (lymestudio.com)
DEPLETED MATERIAL Any substance in which the isotopic abundance of a stable isotope has been reduced from its natural value by artificial or natural means. (radiochemistry.org)
Most elements of biological interest (including C, H, O, N, and S) have two or more stable isotopes, with the lightest of these present in much greater abundance than the others. (uga.edu)
Each has a heavy isotope ( 13 C and 15 N) with a natural abundance of ~1% or less and a light isotope ( l2 C and 14 N) that makes up all of the remainder, in the case of nitrogen, or virtually all in the case of carbon (carbon also has a radioactive isotope, 14 C. (uga.edu)
This specifies the level of isotopic abundance above a given background reading, which is considered zero. (uga.edu)
It is an average over isotopic masses weighted by natural abundance. (citizendium.org)
It is based on a comparability between the observed abundance of a naturally occurring radioactive isotope and its decay merchandise, utilizing known decay charges. (gicjo.net)
To calculate percentage abundance, we must first know the fractional abundance of each isotope. (schconsultores.com)
Comparisons between the observed abundance of certain naturally occurring radioactive isotopes and their decay products, using known decay rates, can be used to measure timescales ranging from before the birth of the Earth to the present. (nupex.eu)

The atomic mass of different isotopes affect their chemical kinetic behavior, leading to natural isotope separation processes. (wikipedia.org)
Isotopic fractionation in plants is caused by physical (slower diffusion of 13C in plant tissues due to increased atomic weight) and biochemical (preference of 12C by two enzymes: RuBisCO and phosphoenolpyruvate carboxylase) factors. (wikipedia.org)
The new proton increases the element's atomic quantity by one, forming a brand new component with the same atomic mass as the parent isotope. (icaihk.org)
The unstable atomic nucleus of Plutonium-238 loses energy in order to reach a stable stage. (chemistrylearner.com)
Nuclear reactions, specifically of the (gamma, n) type, also known as photodisintegration, are utilized to accomplish this transmutation from troublesome, long-lived radioactive waste isotope(s) of given atomic mass to shorter-lived or stable materials of lower atomic mass, by exposing the troublesome isotopes to a high energy photon flux for a sustained time. (rexresearch.com)
Methods for treating radioactive waste by transmutation and for forming a superconductive material from a plurality of constituents, as well as methods for forming improved semiconductor devices, improved atomic lattice structures and improved molecular structures and ionic compounds, are described along with selection rules for fine tuning these methods. (rexresearch.com)
relative atomic mass of an element for gcse how to calculate the % composition of isotopes in an element given its arithmetical algebra. (schconsultores.com)
relative atomic mass calculations how to calculate the relative atomic mass The atomic mass listed for an element on the periodic table is an average mass of all known isotopes of that element. (schconsultores.com)
Edexcel, OCR 21st century, Gateway science GCSE 9-1 chemistry examinations, On other pages relative atomic mass calculations) A level AND all their isotopes are highly radioactive and most are at O level chemistry a good website for free questions on Calculations of % composition of isotopes. (schconsultores.com)
Fluorine F relative atomic mass of 10 Neon Ne relative relative isotopic mass & calculating relative atomic mass Above is typical periodic table used in GCSE science-chemistry specifications in calculating relative atomic mass of an element for gcse Trevor H. Lv 7. (schconsultores.com)
This report is a plan of research and development (R&D) on geosphere stability for long-term isolation of high-level radioactive waste (HLW) in Japan Atomic Energy Agency (JAEA), in fiscal year 2022. (go.jp)

The difference is that inside the unstable copper nucleus, produced from the fusion of a hydrogen mini-atom with a nickel nucleus, is trapped the mini-atom electron ( β- ), which in my opinion undergoes in-situ annihilation, with the predicted (Focardi-Rossi) decay β+ of the new copper nucleus. (journal-of-nuclear-physics.com)
DECAY ENERGY The total energy change when a nuclide in its ground state undergoes radioactive decay to a daughter product in its ground state. (radiochemistry.org)
DECAY, RADIOACTIVE Nuclear decay in which particles or gamma radiation are emitted or the nucleus undergoes spontaneous fission. (radiochemistry.org)
DELAYED FISSION Radioactive decay to a daughter product which is unstable towards fission and consequently undergoes fission in a measurable fraction of decay events. (radiochemistry.org)
For instance, 234Th is unstable and undergoes beta decay to type protactinium-234 (234Pa), which also undergoes beta decay to form uranium-234 (234U). (icaihk.org)
In radioactivity, the half-life is the time taken by a specific amount of a radioactive substance that undergoes decomposition to be decreased by half. (chemistrylearner.com)

Absorption Ratio, Differential-- Ratio of concentration of a nuclide in a given organ or tissue to the concentration that would be obtained if the same administered quantity of this nuclide were uniformly distributed throughout the body. (cdc.gov)

Heavier isotopes like uranium will almost always decay through alpha decay and have long half lives while lighter isotopes like C14 will generally decay via beta decay and have shorter half lives. (spearfrontapologetics.com)
Only when the balance is so unstable and lopsided do we have quick decay rates among heavier isotopes. (spearfrontapologetics.com)

All of the isotopes of uranium are radioactive and decay into thorium, radium, etc., isotopes of lead (progeny or decay products) until a stable nonradioactive isotope of lead is produced (the complete radioactive decay series for 235 U and 238 U are shown in Appendixes A and B). This process of radioactive decay also emits ionizing radiation (alpha particles, beta particles, or gamma rays) with each nuclear transformation. (health.mil)
The title of this article is "28 Signs That The West Coast Is Being Absolutely Fried With Nuclear Radiation From Fukushima", but buried deep in the text is point 20 - the radioactive plume won't reach the West Coast of the United States until 2014. (southernfriedscience.com)
However, it was suggested that a so-called specific difference between the hyperfine splittings in hydrogen-like and lithium-like ions of the same isotope can be used to cancel nuclear structure effects and provide an accurate test of QED [Shabaev et al. (fnal.gov)
In-trap decay spectroscopy research has focused on branching ratios to investigate the double-beta-decay problem and now includes studies of the role of electronic structure in nuclear decay. (fnal.gov)
Reactor-grade plutonium obtained from spent nuclear fuel consists of several plutonium isotopes, out of which only 1% or 2% is Plutonium-238. (chemistrylearner.com)
This is not an effective way of manufacturing Plutonium-238 for Radioisotope Thermoelectric Generators (RTGs) as the spent nuclear fuel would have to go through a difficult process of isotopic separation. (chemistrylearner.com)
This E939 (Helium)-4 binding energy also accounts for why E939 (Helium) is a product of both nuclear fusion and radioactive decay. (atamanchemicals.com)
Disclosed is a radioactive waste treatment process for transmuting long-lived radioisotopes into short-lived radioisotopes through applied nuclear physics. (rexresearch.com)
Embodiments of a method for processing radioacive materials, with a particular embodiment comprising processing uranium with hydrogen isotope plasmas, and a process for remediation of nuclear wastes by transmutation. (rexresearch.com)
To obtain an electrode for cold nuclear fusion which can manufacture isotopes, precious metals, rare elements or thermal energy through nuclear transformation by containing as a material for the electrode a substance which can cause nuclear transformation. (rexresearch.com)
Solution: Radioactive or nonradioactive isotopes are manufactured by the nuclear transformation in an electrode and the combination of nuclear reactions such as neutron capture and natural nuclear disintegration of products made through the nuclear reactions. (rexresearch.com)
There are 22 known isotopes of the chemical element aluminium, as well as several nuclear isomers. (chemlin.org)
These are many times stable and have no effect on anything however sometimes the heavy isotopes can not hold themselves together because the electromagnetic, strong, and weak nuclear forces require a balance. (spearfrontapologetics.com)

From Wiki "Uranium-233 is a fissile isotope of uranium that is bred from thorium-232 as part of the thorium fuel cycle. (turboscholarship.com)
Another radium isotope, 228Ra, belongs to the natural series, parent of which is thorium 232Th. (turboscholarship.com)
Thorium has 6 naturally occurring isotopes. (turboscholarship.com)

In 1960, the physicist John H. Reynolds discovered that certain meteorites contained an isotopic anomaly in the form of an overabundance of xenon-129. (wikidoc.org)
As the half-life of 129 I is 16 million years, this demonstrated that the meteorites were formed during the early history of the Solar System, as the 129 I isotope was likely generated before the Solar System was formed. (wikidoc.org)
For example measuring the ratio of stable and radioactive isotopes in meteorites can give us information on their history and provenance. (nupex.eu)

The mechanism proposed by Focardi - Rossi, verified by mass spectroscopy data, which predicts transmutation of a nickel nucleus to an unstable copper nucleus (isotope), remains in principle valid. (journal-of-nuclear-physics.com)
The β+ and β- annihilation (interaction of matter and anti-matter) would lead to the emission of a high energy photon, γ , (Einstein) from the nucleus of the now stable copper isotope and a neutrin to conserve the lepton number. (journal-of-nuclear-physics.com)
Because uranium is such an unstable factor, the nucleus is able to spontaneous fission, which suggests forcefully splitting the nucleus into two fragments of similar mass. (gicjo.net)
The parent nucleus, that is the original element that is unstable and decaying, is in a high energy state. (spearfrontapologetics.com)

To determine the stability of an isotope, you can use the ratio neutron/proton (N/Z). Also, to help understand this concept, there is a chart of the nuclides, known as a Segre chart. (nuclear-power.com)
If they are close to the island of stability they may have sufficiently long lifetime to survive to present time and decay to isotopes of actinides and other elements. (arxiv-vanity.com)

DELAYED BETA DECAY Radioactive decay to a daughter product which is unstable towards emission of a beta-particle which is then emitted in some fraction of decay events. (radiochemistry.org)
Unstable isotopes decay through various radioactive decay pathways, most commonly alpha decay, beta decay, or electron capture. (nuclear-power.com)
The unstable 14 C decays into 14 N via beta decay (electron emission), and the 14 C content decreases exponentially with time. (nupex.eu)

Many recent studies combine leaf level isotopic fractionation with annual patterns of wood formation (i.e. tree ring δ13C) to quantify the impacts of climatic variations and atmospheric composition on physiological processes of individual trees and forest stands. (wikipedia.org)
The natural isotope composition (isotope ratio) of naturally occurring aluminum can vary to a greater or lesser extent. (chemlin.org)

A fertile isotope can be converted to fissile material - 232 Th is transmuted to fissile 233 U by one neutron absorption and two beta decays. (turboscholarship.com)
The neutron flux during the supernova explosion is very high, and this may lead to the production of the N = 184 and other neutron reach isotopes. (arxiv-vanity.com)

the C3 carbon fixation, where the isotope separation effect is more pronounced, C4 carbon fixation, where the heavier 13C is less depleted, and Crassulacean Acid Metabolism (CAM) plants, where the effect is similar but less pronounced than with C4 plants. (wikipedia.org)
The ratio of carbon-13 and carbon-12 isotopes in these types of plants is as follows: C4 plants: -16 to -10 ‰ CAM plants: -20 to -10 ‰ C3 plants: -33 to -24 ‰ Limestones formed by precipitation in seas from the atmospheric carbon dioxide contain normal proportion of 13C. (wikipedia.org)
IAP team member Jordon Munizzi's PhD research used carbon, nitrogen, and oxygen stable isotope analysis to understand changes in the diets of muskox and caribou on Banks Island over the last 4000 years. (ikaahukarchaeologyproject.com)
Adsorption Coefficient (Koc)-- The ratio of the amount of a chemical adsorbed per unit surface area or per unit weight of organic carbon of a specific particle size in the soil or sediment to the concentration of the chemical in solution at equilibrium. (cdc.gov)
Among stable isotopes the most useful as biological tracers are the heavy isotopes of carbon and nitrogen. (uga.edu)
We can analyze any parts of plants for nitrogen and carbon stable isotopes and total content. (uga.edu)
We analyze all types of soils for nitrogen and carbon stable isotopes and total content. (uga.edu)
For example, the most common isotope of carbon is carbon-12 or 12 C. (nuclear-power.com)
1/12th the mass of a carbon-12 isotope (12C). (schconsultores.com)
Natural carbon contains two stable isotopes 12 C (98.9%) and 13 C (1.1%), plus a tiny amount of the radioisotope 14 C (1.2 x 10 -12 %) with a half life of 5730 years. (nupex.eu)
Carbon (meaning all three isotopes) is absorbed by living organisms, and continuously replenished during their life cycle. (nupex.eu)
A mass spectrometer coupled to an accelerator is used to date samples containing only a few miligrams of carbon by measuring the ratio 14 C/ 12 C (Image courtesy of J. Forest, CNRS Photothèque). (nupex.eu)

As radioactive isotopes of elements decay, they lose their radioactivity and turn into a model new factor often recognized as a daughter isotope. (icaihk.org)

Spectral lines belonging to the short-lifetime heavy radioactive elements up to Es ( Z =99) have been found in the spectra of the Przybylski's star. (arxiv-vanity.com)

The ratios of different stable isotopes of a chemical element can also help archaeologists understand the diet and migration of animals and people, and where materials originated. (ikaahukarchaeologyproject.com)

the amount of a radioactive material that will undergo one decay (disintegration) per second. (cdc.gov)
Naturally occurring xenon is made of nine stable isotopes , but there are also over 40 unstable isotopes that undergo radioactive decay . (wikidoc.org)

chlorine is 75.77% 35Cl of 10.81 and consists of only two isotopes, boron-10 and boron-11. (schconsultores.com)

Cesium-137 persists in the environment for nearly three centuries, contaminating soils, waterways and the food supply (animal milk in particular) with a radioactive substance that mimics the metabolic pathways of potassium (and therefore out-competes potassium in both plant and animal metabolism, see this journal article in Plant and Cell Physiology: "Cesium Inhibits Plant Growth Primarily Through Reduction of Potassium Influx and Accumulation in Arabidopsis. (lymestudio.com)
Cesium-137 is an unstable, radioactive isotope of cesium with roughly a 29 year half life. (lymestudio.com)
It is the things in the water - such as cesium-137 particles - which make the water radioactive as a whole. (lymestudio.com)
Ocean simulations showed that the plume of radioactive cesium-137 released by the Fukushima disaster in 2011 could begin flowing into U.S. coastal waters starting in early 2014 and peak in 2016. (southernfriedscience.com)

He inferred that this was a decay product of radioactive iodine -129. (wikidoc.org)
Because of the specificity of its uptake by the human body, radioactive isotopes of iodine can also be used to treat thyroid cancer . (wikipedia.org)

Synonymous with radioactive chain and radioactive decay series. (radiochemistry.org)

A liquid mixture of the two isotopes E939 (Helium)-3 and E939 (Helium)-4 separates at temperatures below about 0.8 K (−272.4 °C, or −458.2 °F) into two layers. (atamanchemicals.com)
Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Home Questions Tags Users Unanswered Calculate the molar fraction of a mixture component given … If a mass spectrum of the element was given, the relative percentage isotope abundances are usually presented as a vertical bar graph. (schconsultores.com)

The latter three isotopes (206Pb, 207Pb, and 208Pb) are formed by the radioactive decay of the long-lived natural isotopes 238U, 235U, and 232Th, respectively, while 204Pb has no radioactive progenitor. (turboscholarship.com)

It is only harmful in its radioactive forms (of which 137 is the most common) where cesium emits both beta and gamma radiation . (lymestudio.com)
Internal exposure to Cs-137, through ingestion or inhalation, allows the radioactive material to be distributed in the soft tissues, especially muscle tissue, exposing these tissues to the beta particles and gamma radiation and increasing cancer risk. (lymestudio.com)
Stated another way, you can't make water radioactive by merely exposing it to radiation. (lymestudio.com)
Acute Exposure, Radiation-- The absorption of a relatively large amount of radiation (or intake of a radioactive material) over a short period of time. (cdc.gov)
Although much less radioactive than naturally occurring uranium, DU is radioactive and poses a potential health risk from internal and external radiation exposure. (health.mil)
This is because both enriched and natural uranium are much more radioactive than DU and, therefore, would have a greater radiation effect than would DU. (health.mil)

An isotopic signature (also isotopic fingerprint) is a ratio of non-radiogenic 'stable isotopes', stable radiogenic isotopes, or unstable radioactive isotopes of particular elements in an investigated material. (wikipedia.org)
Elements can exist in both stable and unstable (radioactive) forms. (uga.edu)
Isotopic relationship of rocks, or the minerals in them, relies on the truth that we know the decay rates of sure unstable isotopes of elements and that these charges have been fixed over geological time. (gicjo.net)
The results for the isotopic shifts in the strongest optical electromagnetic transitions in No, Lr, Nh, Fl,and Z =120 elements are presented. (arxiv-vanity.com)
Because radioactive elements have various half-lives, there are numerous different methods that apply to different timescales. (nupex.eu)

DECAY CURVE A graph showing the relative amount of radioactive substance remaining after any time interval. (radiochemistry.org)
It is a radioactive substance extensively used as a longstanding fuel source in space probes. (chemistrylearner.com)

Since every radioactive factor decays at a recognized fee, it can be thought of as a ticking clock. (icaihk.org)

Uranium is a silver-colored heavy metal in its pure form that is natural, ubiquitous, and radioactive. (health.mil)
DU is less radioactive than naturally occurring uranium because it has fewer of the more radioactive isotopes per unit weight than does natural uranium. (health.mil)
U-238, which constitutes more than 99 percent of the mass of natural uranium, is the least radioactive per unit weight. (health.mil)
The material generally used by the U.S. Department of Defense (DoD) is 40 percent less radioactive than natural uranium. (health.mil)
However, some studies suggest that E939 (Helium) produced deep in the earth by radioactive decay can collect in natural gas reserves in larger than expected quantities, in some cases, having been released by volcanic activity. (atamanchemicals.com)
Since these lines belong to short-living isotopes the natural question is how the isotopes were produced. (arxiv-vanity.com)

The ratios of isotopes in a sample material are measured by isotope-ratio mass spectrometry against an isotopic reference material. (wikipedia.org)
m/z means mass over charge ratio. (lymestudio.com)
The term for activity per unit mass of a radioactive element is specific activity. (cdc.gov)
The very long half-life of 238 U (4.5 billion years), the most abundant isotope, yields a very low decay rate per unit mass of uranium. (health.mil)
The Isotope mass of Plutonium-238 is 238.049553 u. (chemistrylearner.com)
percentage (%) of each isotope of an element in order to accurately mass of an element to help revise gcse If x and y were linearly correlated, we would expect all the points to fall on a straight line passing through the centroid. (schconsultores.com)

The threshold zones are placed against a carrier material or close to vol. zones of metals or metal layers, composed of metals capable of absorbing \-1 atom% of hydrogen or its isotope. (rexresearch.com)

Of course, if the ratio between hydrogen and oxygen in water were not one to one, but some other ratio, the weight of oxygen would have to be adjusted accordingly. (encyclopedia.com)

Appendices present comprehensive information, such as monitoring programs, monitoring methods, monitoring results and their trends, meteorological data and discharged radioactive wastes. (go.jp)

One of the isotope pairs widely used in geology is the decay of 40K to 40Ar (potassium-40 to argon-40). (gicjo.net)
40K is a radioactive isotope of potassium that's present in very small amounts in all minerals which have potassium in them. (gicjo.net)

[2] Because of the high percentage of 238 U and its slow decay rate, naturally occurring uranium is, in fact, one of the least radioactive substances among unstable isotopes on the planet. (health.mil)
DATING, RADIOACTIVE The determination of the radioactive age of an object from its content of radioactive substances and of their daughter products. (radiochemistry.org)

Radiocarbon dating is perhaps the most obvious example of isotopic dating in archaeology. (ikaahukarchaeologyproject.com)

An extension of this research resulted in development of DNA-based stable-isotope probing, which allows examination of links between metabolic function and taxonomic identity of microorganisms in the environment, without the need for culture isolation. (wikipedia.org)

it is a man-made element whose isotopes Am-237 through Am-246 are all radioactive. (cdc.gov)
By measuring the ratio of the quantity of the unique radioactive element to the daughter isotope, scientists can determine how many half-lives the element has undergone and from there can determine absolutely the age of the pattern. (icaihk.org)
Meitnerium is an extremely radioactive synthetic element. (centraldatacore.com)
Thus over time if we start with X amount of the radioactive isotope which degrades into the daughter element (the element left over from the radioactive decay) we can measure each of these and see how much time has transpired and thus date the rock. (spearfrontapologetics.com)

Also, please understand that water which is radioactive is merely contaminated with radioactive particles . (lymestudio.com)
If you can remove those particles, your water is no longer radioactive. (lymestudio.com)

The three isotopes of naturally occurring uranium-- 238 U, 235 U, and 234 U--possess half-lives of 4.5 x 10 9 , 7.1 x 10 8 , and 2.5 x 10 5 years, respectively. (health.mil)
nonetheless, different radioactive components have totally different half-lives. (gicjo.net)
All other isotopes are unstable with small half-lives of less than 7 minutes or much less. (chemlin.org)

This reaction is defined as radioactive decay. (chemistrylearner.com)

This process is called isotope analysis. (wikipedia.org)

The Stable Isotope Ecology Laboratory of the Center for Applied Isotope Studies at the University of Georgia , offers a wide variety of analytical services to researchers associated with any bona-fide nonprofit research organization. (uga.edu)

Luckily, two ocean currents off the eastern coast of Japan - the Kuroshio Current and the Kuroshio Extension - would have diluted the radioactive material so that its concentration fell well below the World Health Organization's safety levels within four months of the Fukushima incident. (southernfriedscience.com)
Annual Limit on Intake (ALI)-The derived limit for the amount of radioactive material taken into the body of an adult worker by inhalation or ingestion in a year. (docslib.org)

The most stable known isotope, meitnerium-278, has a half-life of 7.6 seconds and is calculated to have similar properties to its lighter homologues, cobalt, rhodium, and iridium. (centraldatacore.com)

The 14C isotope is important in distinguishing biosynthetized materials from man-made ones. (wikipedia.org)
When combined with the use of other isotopic labels, 15N is also a very important tracer for describing the fate of nitrogenous organic pollutants. (wikipedia.org)
Stable isotopes are important as well. (ikaahukarchaeologyproject.com)
It is important that the radioactive isotope be contained inside the pattern being dated. (icaihk.org)
The isotope ratios of xenon are an important tool for studying the early history of the Solar System. (wikidoc.org)
The two following tables list the most important data and properties of the Aluminium isotopes. (chemlin.org)

Chemicals and Drugs16

Analytical, Diagnostic and Therapeutic Techniques and Equipment1

Phenomena and Processes1

Information Science1

Depleted uranium1

Neutrons12

Nuclei6

Atoms6

Stable lead isotopes2

Abundance9

Atomic11

Undergoes6

Nuclide1

Heavier isotopes2

Nuclear13

Thorium3

Meteorites3

Nucleus4

Stability2

Beta decay3

Composition2

Neutron2

Carbon12

Radioactivity1

Heavy radioactive elements1

Materials originated1

Undergo2

Chlorine1

Cesium-1374

Iodine2

Decay series1

Mixture2

Long-lived1

Radiation6

Elements5

Substance2

Decays1

Natural6

Mass6

Atom1

Hydrogen1

Wastes1

Potassium2

Substances2

Radiocarbon1

Isolation1

Element4

Particles2

Half-lives3

Reaction1

Process1

Laboratory1

Material2

Lighter1

Important6