Americium was detected in the fallout from the Ivy Mike nuclear test.

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

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

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

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.

An Americium container from a smoke detector.

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.

But her prettiness was what he had noticed first, and all the other things had come afterward: cruelty, meanness, self-will.

There was an artificial lake just out of sight in the first stand of trees, fed by a half dozen springs that popped out of the ground above the hillside orchard.

The first part of the road was steep, but it leveled off after the second bend and curled gradually into the valley.

No one was behind it, but in the rear wall of the office I noticed, for the first time, a door which had been left partially open.

The herd was watered and then thrown onto a broad grass flat which was to be the first night's bedground.

Once again, Tom Horn was the first and most likely suspect, and he was brought in for questioning immediately.

For Matilda, it was the first she had known in many a night.

Even the knowledge that she was losing another boy, as a mother always does when a marriage is made, did not prevent her from having the first carefree, dreamless sleep that she had known since they dropped down the canyon and into Bear Valley, way, way back there when they were crossing those other mountains.

Stevens was grunting over the last empty pocket when Russ abruptly rose and lunged toward Carmer's hat, which had tumbled half-a-dozen feet away when he first fell.

The Indian's arm whipped sidewise -- there was a flash of amber and froth, the crash of the bottle shattering against the side of the first car.

It was her first smile.

At first, I thought he was out of his head, talking wildly like this.

Hell, I gave him the first decent job he ever had, six, seven -- how many years ago was it, Rob ''??

Miss Langford ( her first name was Evelyn ) was an attractive girl.

School began in August, the hottest part of the year, and for the first few days Miss Langford was very lenient with the children, letting them play a lot and the new ones sort of get acquainted with one another.

It was just as well that the ignorant Dandy enjoyed himself to the hilt that first evening, for the room was to become his prison cell.

`` Bastards '', he would say, `` all I did was put a beat to that Vivaldi stuff, and the first chair clobbered me ''!!

In 1961 the first important legislative victory of the Kennedy Administration came when the principle of national responsibility for local economic distress won out over a `` state's-responsibility '' proposal -- provision was made for payment for unemployment relief by nation-wide taxation rather than by a levy only on those states afflicted with manpower surplus.

The first systematic thinking about this Pandora's box within Pandora's boxes was done four years ago by Fred Ikle, a frail, meek-mannered Swiss-born sociologist.

The smell at first was more surprising than unpleasant.

His collaboration with Washington, begun when he was the general's aide during the Revolution, was resumed when he entered the first Cabinet as Secretary of the Treasury.

Because the summer was unusually dry and hot, the spring produced a smaller stream than in ordinary years.

After a year in a studio on Sheridan Square, having married an American girl who was a native of Virginia, Helion moved to a village in the Blue Ridge mountains, where he produced some of the most imposing of his abstract canvases.

William Gilmore Simms, sturdy realist that he was, pleaded for a natural robustness such as he found in his favorites the great Elizabethans, to vivify the pale writings being produced around him.

Historical records indicate that Copernicus was unaware of the fundamental aspects of his so-called ' revolution ', unaware perhaps of its historical importance, he rested content with having produced a simpler scheme for prediction.

If, as Reid says, `` nearly all his poetry was produced when he was not taking opium '', there may be some reason to doubt that he was under its influence in the period from 1896 to 1900 when he was writing the poems to Katie King and making plans for another book of verse.

Then there was Mark Howe and there was Henry Dwight Sedgwick, an accomplished man of letters who wrote in the spirit of Montaigne and produced in the end a formidable body of work.

It was the Eisenhower Administration which produced the largest peacetime deficit.

It has been said that when local government revenues were mostly produced locally from the property tax, the lack of a uniform fiscal year was no great handicap ; ;

The Senate Subcommittee on Reorganization and International Organizations was provided samples of visual aids on first aid and personal health produced by the Medical Illustration Service.

The accuracy of measuring the total electrical energy entering an exploding wire during a few microseconds was verified when two independent types of comparison with the heat energy produced had an uncertainty of less than 2 percent.

A satisfactory cloud was produced even though these nozzles were only about 5 per cent efficient in producing an initial cloud in the size range of 1 to 5 microns.

The other, a shallow concave gradient ( Fig. 1 ), was produced with a so-called `` cone-sphere '' apparatus, the `` cone '' being a 2-liter Erlenmeyer flask and the `` sphere, '' a 2-liter round-bottom flask.

When this situation exists, the address Af will equal Af which was produced from Af.

His chief discovery was important -- the Great North ( later, the Hudson ) River -- but it produced no northwest passage.

A student orator `` produced tears from a great number of the learned '' even before the punch was served.

This discovery of Melies was vastly more important than his sometimes dazzling, magician's tricks produced on film.

It was Porter, however, who produced the very first movie whose name has lived on through the half century of film history that has since ensued.

In all of this extensive and expensive effort, the camera was downgraded to the status of recording instrument for art work produced elsewhere by the actor or by the author.

In view of Eisenhower's reluctance to concede that anything was amiss in the Terror, it is doubtful that heroic intervention by Dulles could have produced anything but disaster for him and the country's foreign policy.

The first time was in 1955 when a full-dress Big Four summit meeting produced the `` spirit of Geneva ''.

Representing as it did the efforts of only unauthorized individuals of the Roman and Anglican Churches, and urging a communion of prayer unacceptable to Rome, this association produced little fruit, and, in fact, was condemned by the Holy Office in 1864.