Detection of Plutonium-244 in Nature

  title={Detection of Plutonium-244 in Nature},
  author={Darleane C. Hoffman and F. O. Lawrence and Jack L Mewherter and Frank Rourke},
Mass spectrometric measurements of plutonium isolated from Precambrian bastnasite confirm the presence of 244Pu in nature. Although the existence of 244Pu as an extinct radioactivity has been postulated to explain the xenon isotope ratios observed in meteorites, this is the first indication of its present existence in nature. 

Search for Plutonium-244 Tracks in Mountain Pass Bastnaesite

WE have found that bastnaesite, a rare earth fluorocarbonate, from the Precambrian Mountain Pass deposit has an apparent Cretaceous fission track age, and hence does not reveal any anomalous fission

Haloes from plutonium minerals and fission alphas?

The normal alpha decay of naturally occurring 244Pu can be expected to have produced pleochroic haloes detectable in existing rocks. Several methods of identifying such haloes are described here.

Analytical Chemistry of Plutonium

In 1940, shortly after the discovery of fission, McMillan and Abelson studied the recoil range of fission products induced by neutrons incident on a thin uranium foil (McMillan, 1939; McMillan and

Plutonium anomaly in nature.

The 239Pu/238U ratios are reexamined in volcanic ashes and rock, uranium mineral and other contemporary terrestrial samples and also in the atmospheric samples. This ratio in rain samples collected

Possible cosmic dust origin of terrestrial plutonium-244

THE discovery of 244Pu by Hoffman et al.1 in bastnaesite, a Precambrian rare earth fluorocarbonate ore from the Mountain Pass deposit in California, has raised the question of whether the so-called

Xenology, FUN Anomalies and the Plutonium-244 Story

It has long been generally accepted that 244Pu fission xenon is absent in lunar fines, while carbonaceous chondrites contain the so-called xenon-HL, which is a strange fission-like xenon component,

Isotopic Composition of Lead in Galena from the Mountain Pass Carbonatite, California

LITTLE is known of the isotopic composition of lead in carbonatites, a rock type commonly considered to be derived from the mantle. Here I shall present data for galena from the Mountain Pass

A Study on Determination of Potentially Hazardous Plutonium Isotopes in Environmental Samples

  • D. Strumińska-Parulska
  • Environmental Science
    Journal of environmental science and health. Part C, Environmental carcinogenesis & ecotoxicology reviews
  • 2013
The concentrations of plutonium isotopes in analyzed samples indicates its measurement is of great importance for environmental and safety assessment, especially in contaminated areas.



Plutonium-244: Confirmation as an Extinct Radioactivity

The mass spectrum of xenon from spontaneous fission in a laboratory sample of plutonium-244 is precisely what meteoriticists predicted it would be, and the search for an explanation for anomalous fission-like xenon in carbonaceous chondrites can now be narrowed.

The abundance of244Pu in the early solar system


Simultaneous determinations of U and Th abundances are obtained in the Orgueil (type I) carbonaceous chondrite, the Mokoia and Karoonda olivine-pigeonite chondrites, and the Hvittis enstatite

Nuclear Fission in the Early History of the Earth

Differences in the isotopic ratios of xenon in the Earth's atmosphere and in the Richardson meteorite are discussed. The differences indicate that at least 10% of the atmospheric xenon-138 is

A Three Stage Mass Spectrometer

A three stage mass spectrometer, utilizing two consecutive magnetic focusing lenses of 20″ radii followed by a 20” radius of curvature electrostatic analyzer, is described An abundance sensitivity of