Americium was first produced in 1944 by the group of Glenn T. Seaborg at the University of California, Berkeley.

An Americium container from a smoke detector.

Americium ( ) is a transuranic radioactive chemical element that has the symbol Am and atomic number 95.

Americium is a relatively soft radioactive metal with silvery appearance.

* Americium ca.

* Americium discovered by Glenn T. Seaborg, et al.

During his Manhattan Project research in 1943 Glenn T. Seaborg experienced unexpected difficulty isolating Americium ( 95 ) and Curium ( 96 ).

One such proposal calls for a gas cooled fast reactor that is fueled primarily by Plutonium and Americium.

The neutronic properties of Americium make it difficult to use in any critical reactor because it tends to make the moderator temperature coefficient more positive, decreasing stability.

The inherent safety of an ADS, however, would allow Americium to be safely burned.

Americium ( Am ) is an artificial element, and thus a standard atomic mass cannot be given.

The radio emission of a planet was first detected in 1955, when Burke and Franklin ( 1955 ) identified the origin of interference-like radio noise on their records at about 15 meters wave length as emission from Jupiter.

The magnetic resonance absorption was detected by employing a Varian model Af broad line spectrometer and the associated 12-inch electromagnet system.

In 2 of 15 experiments on whole serum a region of agglutinin activity with intermediate anionic binding capacity was detected ( Region 3, Fig. 1 ).

This was particularly noticeable in group A and group B sera, in which cases activity in Regions 1 and 2 was usually not detectable without prior concentration and occasionally could not be detected at all.

when the insoluble fraction was suspended in a volume of saline equal to that of the original serum sample, no complete antibody activity could be detected.

Ferric thiocyanate has been suggested, and sulfur was said to have been detected in the mineral.

Though there was no Bronze Age city on the site, archaeology has detected human activity that is evident from the earliest Iron Age, circa 1100 BC.

The word " allele " is a short form of allelomorph (' other form '), which was used in the early days of genetics to describe variant forms of a gene detected as different phenotypes.

Nor was a connection immediately detected between them and the objects found four years later in a tomb at Menidi in Attica and a rock-cut " bee-hive " grave near the Argive Heraeum.

Greeks of the Classical age always detected that there was something alien and uncanny about the Aegis.

In 2007, the first case of bluetongue in the Czech Republic was detected in one bull near Cheb at the Czech-German border.

The frequency of new enhancing lesions as detected by Gd-enhanced MRI was reduced by more than half in 12 patients, comparing the six-month run-in phase to the six-month post-BCG phase of the experiment.

A major modification to Noth's theory was made in 1973 by the American scholar Frank M. Cross, to the effect that two editions of the history could be distinguished, the first and more important from the court of king Josiah in the late 7th century, and the second Noth's 6th century Exilic history, and other scholars have detected many more authors / editors than either Noth or Cross allowed for.

This meta-analysis found that long-term use of benzodiazepines was associated with moderate to large adverse effects on all areas of cognition, with visuospatial memory being the most commonly detected impairment.

A few minutes after the impact fireball was detected, Galileo measured renewed heating, probably due to ejected material falling back onto the planet.

As well as these molecules, emission from heavy atoms such as iron, magnesium and silicon was detected, with abundances consistent with what would be found in a cometary nucleus.

While substantial water was detected spectroscopically, it was not as much as predicted beforehand, meaning that either the water layer thought to exist below the clouds was thinner than predicted, or that the cometary fragments did not penetrate deeply enough.

Cathode rays are invisible, but their presence was first detected in early vacuum tubes when they struck the glass wall of the tube, exciting the atoms of the glass and causing them to emit light, a glow called fluorescence.

Although migration of cells was detected from the early days of the development of microscopy ( Leeuwenhoek ), erudite description of chemotaxis was first made by T W. Engelmann ( 1881 ) and W. F.

At any rate, the uprising was strictly confined to Saturninus ' province, and quickly detected once the rumour spread across the neighbouring provinces.

Despite the fact that the Cubs had won 89 games, this fallout was decidedly unlovable, as the Cubs traded superstar Sammy Sosa after he had left the season's final game early and then lied about it publicly.

Einsteinium was first observed in the fallout from the Ivy Mike nuclear test.

Einsteinium was first identified in December 1952 by Albert Ghiorso and co-workers at the University of California, Berkeley in collaboration with the Argonne and Los Alamos National Laboratories, in the fallout from the Ivy Mike nuclear test.

In 1954, the 23 man crew of the Japanese fishing vessel Lucky Dragon was exposed to radioactive fallout from a hydrogen bomb test at Bikini Atoll, in 1969, an ecologically catastrophic oil spill from an offshore well in California's Santa Barbara Channel, Barry Commoner's protest against nuclear testing, Rachel Carson's book Silent Spring, Paul R. Ehrlich's The Population Bomb all added anxiety about the environment.

Fermium was first observed in the fallout from the Ivy Mike nuclear test.

Fermium was first discovered in the fallout from the ' Ivy Mike ' nuclear test ( 1 November 1952 ), the first successful test of a hydrogen bomb .< ref name =" lanl ">

In May 1985, the vessel was instrumental for ' Operation Exodus ', the evacuation of about 300 Rongelap Atoll islanders whose home had been contaminated with nuclear fallout from a US nuclear test two decades ago which had never been cleaned up and was still having severe health effects on the locals.

Public concern with the goth subculture reached a high point in the fallout of the Columbine High School massacre that was carried out by two students, incorrectly associated with the goth subculture.

Because Little Boy was an air burst above the ground, there was no bomb crater and no local radioactive fallout.

Project 4. 1 was a medical study conducted by the United States of those residents of the Bikini Atoll exposed to radioactive fallout.

The Chernobyl disaster had significant impact on public opinion at the end of the 1980s, and the fallout was still causing cancer deaths well into the 1990s and possibly even into the 21st century.

The resulting political fallout was severely damaging to the George W. Bush administration because of its perceived failure to act promptly and effectively.

When the United States Treasury bailed out large financial firms, to ostensibly halt a downward spiral in the nation's economy, there was tremendous negative political fallout, particularly when reports came out that monies supposed to be used to ease credit restrictions were being used to pay bonuses to highly-paid employees.

The fallout of the war was that Britain lost all of its continental naval bases between the Maritimes and Spanish Florida, ultimately the West Indies.

The project was moderately successful, but was very expensive and was superseded by a network of seismic detectors and air sampling for fallout which were cheaper, more reliable, and easier to deploy and operate.

At first, there was little fallout from this.

In 1954, the 23 man crew of the Japanese fishing vessel Lucky Dragon 5 was exposed to radioactive fallout from a hydrogen bomb test at Bikini Atoll.

There was also the economic fallout on West Germany of the 1973 oil crisis, which almost seems to have been enough stress to finish off Brandt as the Chancellor.

Then they were faced briefly with an image of a desperate family in a fallout shelter, which vanished and was replaced by a series of images reflecting the sweep of history, starting with the Acropolis and ending with an image of Marilyn Monroe ( but, again, including a mushroom cloud ).

A " Black Warning ," also for manual sirens, was either a Morse code ' D ' (— · ·) or three quick tones, indicating imminent danger of fallout.