Half-life of tritium

Use tite half-life of tritium given in Problem 53 to calculate the activity in curies of 1.00 mL of 3H2 at STP. 

Estimation of total body water (virtual tritium space) in the rat, cat, rabbit, guinea-pig, and man, and of the biological half-life of tritium in man,... 

G. R., Biological half-life of tritium, Health Physics 1963, 9, 911-914. 

Cale, W. G., Jr., Fenyves, E. J., A model to estimate the biological half-life of tritium in man, Proc. Summer Comput. Simul. Conf. 1978, 629-635. 

The relatively short half-life of tritium (12.26 years) requires an appropriate modification of the above criteria for tritium studies made at a date later than the date of publication (1973). Also, the criteria are developed for the mid-latitudes in the northern hemisphere and should not be applied elsewhere. 

The short half-life of tritium imposes a time limit on the usefulness of tritium dating. However, because tritium decays to... 

Calculate the disintegration rate of 1 cm3 of tritium at standard temperature and pressure. What will the activity be after 2.5 years The half life of tritium is 12.26 years. Express your answers in curies and becquerels. 

Tritium (hydrogen-3) is used to enhance the explosive yield of nuclear warheads. It is manufactured in specialized nuclear reactors. The half-life of tritium is 12.3 years. If no new tritium were produced, what fraction of the world s supply of tritium would exist in 50 years ... 

The half-life of tritium, fH, is 12.3 y. How long will it take for seven-eighths of the sample to decay ... 

A very interesting ab initio study of p-decay in OHT, NHjT, and CHjT has been reported by Ikuta et al. [115]. P-decay of tritium yields (besides a neutrino particle u) the helium isotope He. Because of the relatively short half-life of tritium (12.26 years), tritiated compounds may be thought of as a convenient source of helium-containing molecular ions ... 

Ocean disposal. In view of the relatively short half-life of tritium and of the enormous isotopic dilution, sea disposal is another alternative for dealing with tritium waste. Transport will be an economic drawback of this alternative, and political and administrative problems will have to be solved. 

As mentioned above H- He age and isolation age unfortunately do not exactly agree in mixed waters. Nevertheless, direct application of H- He age for quantification of water exchange is possible but limited to cases where (1) the concentration is approximately homogeneous, and (2) the water age is small compared to the half-life of tritium. The second condition is required because if H- He ratios are small the water age can be linearized (Eqn. 34). If both conditions are fulfilled, mixing affects the H- He age in the same way as Hetn. Then, the H- He age behaves as a bio-geochemically inert tracer with a constant source term increasing the age by 1 yr per yr and the H- He age can be treated as an ideal tracer of the isolation age. 

Lucas LL, Unterweger MP (2000) Comprehensive review and critical evaluation of the half-life of Tritium. J Res Natl Inst Stand Technol 105 541-549... 

Some watch dials are coated with a phosphor, like ZnS, and a polymer in which some of the atoms have been replaced by atoms, tritium. The phosphor emits light when struck by the beta particle from the tritium decay, causing the dials to glow in the dark. The half-life of tritium is 12.3 yr. If the light given off is assumed to be directly proportional to the amount of tritium, by how much will a dial be dimmed in a watch that is 50 years old ... 

The biological half life of tritium, either ingested or inhaled, is 10 days. Due to the easy absorption of water by the body, it is more dangerous in the form of tritiated water than as elemental tritium (conservatively, a factor of 25000 is considered in safety analyses, even if recent studies tend to divide this factor by two). 

The half-life of tritium (hydrogen-3) is 12.3 yr. If 48.0 mg of tritium is released from a nudear power plant during the course of an acddent, what mass of this nuclide will remain after 12.3 yr After 49.2 yr ... 

A sample of tritium, H, was observed to produce beta rays at the rate of 1200 per minute. Ten months later the beta rate of the sample was 1144 counts per minute. To what value of the half-life of tritium does this measurement lead ... 

Tritium, or hydrogen-3, is formed in the upper atmosphere by cosmic rays, similar to the formation of carbon-14. Tritium has been used to determine the age of wines. A certain wine that has been aged in a bottle has a tritium content only 70% of that in a similar wine of the same mass that has just been bottled. How long has the aged wine been in the bottle The half-life of tritium is 12.3 y. 

Here neutrons from cosmic rays bombard the nitrogen of the upper atmosphere, producing carbon-12 and tritium. The tritium makes its way down to the Earths surface as precipitation, probably in the form of compounds such as HTO (water with one regular hydrogen replaced by a tritium atom). Because the half-life of tritium is only 12.3 years, its concentration in the oceans is much less than it is in rainwater. During the early 1950s when atmospheric testing of nuclear weapons was carried out, the concentration of tritium in rainwater reached about 500 atoms/10 atoms. 

The magnitude of the half-life of tritium implies a fairly high rate of nuclear disintegration the maximum specific radioactivity of monotritiated compounds is 29.15 Ci mmol , which is 1.078 TBq, where 1 Ci = 3.7 x 10 Bq (1 Bq is defined as 1 disintegration The only radiation emitted is soft 3"radiatloa... 

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