The phrase "a constant lifetime" is correct and usable in written English.
It can be used to describe something that remains unchanged or consistent throughout an entire lifespan or duration.
Example: "The researchers found that the effects of the treatment resulted in a constant lifetime of the cells, ensuring their longevity."
Alternatives: "an unchanging lifetime" or "a perpetual lifespan."
Markus et al. [21] reported a constant lifetime of about 950 ps over a wide range of temperature within the experimental error.
We remark that, in the presence of Auger processes, the measured lifetime is a function of the excitation density, so that the use of a constant lifetime in Equation 1 represents an approximation.
Based on the Taylor expansion series, a standard tangential function tan ϕ in Eq. 1 is approximated by: (4) With traditional frequency-domain theory [see Eq. 1], as the modulation frequency, ω, becomes lower, the tan ϕ and ϕ also reduce given a constant lifetime τ, [see Eq. 4].
For example, if we require equal numbers of latently infected individuals to progress to disease in both models, then we must assume a smaller progression rate for the constant lifetime model.
However, because many current risk assessments are done based on dosages expressed in milligrams per kilogram, rather than milligrams per kilogram body weight3/4, Table 10 and Figure 10 show comparable results for a scenario in which there is constant lifetime exposure in terms of simple milligrams per kilogram body weight.
The stacks induced a constant effective lifetime under low illumination, comparable to Al2O3 on p-type Si.
The EC01 (i.e., the estimated constant lifetime exposure level associated with a 1% excess lifetime risk of developing breast cancer) is determined by iteratively varying the exposure level until a lifetime excess risk of 0.01 is obtained.
The constant lifetime is somewhat similar to the hole-trapping mechanism before the trap states are filled [41, 42].
At low injection levels and constant lifetime of holes, the concentration of photo-carriers will be ( Delta p=eta alpha {tau}_pfrac{W}{hnu} ) [25].
For example, studies in the United Kingdom estimated the lifetime cost-effectiveness of first [ 41] and second-eye [ 33] cataract surgery by assuming only two health states (alive and dead) and constant lifetime surgery benefit.
For example, we find that constant lifetimes result in a greater prevalence of disease than exponential lifetimes.
