http://www.iem-inc.com/information/tools/specific-activities WebIn natural uranium and in uranium ore, 234 U occurs as an indirect decay product of uranium-238, but it makes up only 0.0055% (55 parts per million) of the raw uranium because its half-life of just 245,500 years is only about 1/18,000 as long as that of 238 U. Thus the rate of 234 U to 238

49 CFR § 173.434 - Activity-mass relationships for …

WebOct 11, 2024 · The specific activity of uranium-238 in the studied area ranged from 1.9 ± 0.3 Bq/kg to 46.5 ± 1.7 Bq/kg, with an average value of 18.01 ± 1.24, from 0.8 ± 0.2 Bq/kg to 32.6 ± 1.5 Bq/kg with an average of 13.36 ± 0.91 Bq/kg for thorium-232, from 109.4 ± 2.3 Bq/kg to 533.8 ± 6.0 Bq/kg with an average value of 256.9 ± 12.23 Bq/kg for potassium-40. Web15 rows · The table of activity-mass relationships for uranium and natural thorium are as follows: 1 The ... other names for tabernacle

Depleted Uranium IAEA - International Atomic Energy Agency

http://hpschapters.org/northcarolina/NSDS/thorium.pdf WebThe specific activity of a given nuclide or compound is the total activity occurring per unit mass of that nuclide or compound, expressed in Ci/kg. Natural thorium (Th-nat) is a mixture of 232Xh and 22sjh in proportions that produce an equal number of disintegrations per second. According to the radio WebNatural thorium is composed of equilibrated Th-232 and Th-228 and their decay products as shown in Figure 1. Because the specific activity of Th-232 is small (1.1 x 10-7. Ci per g) compared to Th-228 (820 Ci per g) (ORNL 2006) essentially all of the mass in any thorium mixture is associated with Th-232. In 1.0 g of natural thorium there would ... rockhampton physio