Sentences with phrase «radium isotopes»

Tests in soils affected by oil and gas wastewater spills in West Virginia and North Dakota verify that the new methods can determine the age of spills and identify their origins, based on the variations of radium isotopes and their decay products found in contaminated soils or sediments.

Waters produced from unconventional oil and gas wells typically have radium isotope ratios (radium - 228 to radium - 226) that are different than those from conventional oil and gas operations, he said.

Not exact matches

The theory is based on new analysis of xenon isotopes detected by scientists from the V.G. Khlopin Radium Institute in the Leningrad, four days after the accident, at Cherepovets, a city north of Moscow far from the major track of Chernobyl debris.

«We developed three independent age - dating techniques that are based on the different decay rates of radium, thorium and lead isotopes.

«By identifying differences in the distribution of isotopes of radium and its decay products, we can now detect the age and origin of spills and provide a clear answer about their source,» Vengosh said.

A few studies have found naturally occurring radioactive materials in the solid waste, but the research only focused on several long - lived radioactive isotopes including uranium - 238 and radium - 226.

To determine the shape of the nuclei, the researchers produced beams of exotic — short - lived — radium and radon atoms at CERN's Isotope Separator facility ISOLDE.

Out of its thirty - two isotopes, thorium - 230 and thorium - 232 are the most stable ones with a half - life of 7.54 × 104 years and 1.4 × 1010 years, respectively, where the latter decays into radium - 228 through alpha decay or spontaneous fission [2, 5].

Erika Kobayashi's Half - Life Calendar Radium 226 (2014) traces the radioactive isotope from Marie Curie's discovery to the year 3503, when the radiation from Fukushima will finally dissipate.

Shale has a radioactive signature — from uranium isotopes such as radium - 226 and radium - 228 — that geologists and drillers often measure to chart the vast underground formations.

Charges for medication, x-ray services, laboratory tests and services, the use of radium and radioactive isotopes, oxygen, blood transfusions, iron lungs, and Medical Treatment; dressings, drugs, and medicines that can only be obtained upon a written prescription of a Physician or Surgeon.

Expenses for medication, x-ray services, laboratory tests and services, the use of radium and radio - active isotopes, oxygen, blood transfusions, iron lungs, and medical Treatment.