Undergrad Nuclear Physics: Yearly Time Measurement

[Bertin]

Halves-lives and average lifetimes, when studying nuclear decay, are often expressed in years even though years are not standarized, at least in SI (as far as I know). Borrowing the convention from astronomy and astrophysics, I usually take 1 \mathrm{yr} to be equal to 365.25 days of 86400 \mathrm{s}, so a Julian year. I'd like to know, however, if there is a convention in nuclear physics concerning the equivalent in seconds of a year. Thank you in advance for your time!

 

[Bertin]

Halves-lives and average lifetimes, when studying nuclear decay, are often expressed in years even though years are not standarized, at least in SI (as far as I know). Borrowing the convention from astronomy and astrophysics, I usually take 1 \mathrm{yr} to be equal to 365.25 days of 86400 \mathrm{s}, so a Julian year. I'd like to know, however, if there is a convention in nuclear physics concerning the equivalent in seconds of a year. Thank you in advance for your time!

The most voted answer to this same question in stackexchange says that there is no generally accepted convetion and that, most often, the error in the numerical values expressed in yearsis greater than the differences in the numerical values introduced by using one or another usual definition of a year.

 

[mfb]

The relative difference between the Julian and Gregorian year is just 3*10^-5, I would be surprised if any half life has been measured that precisely.

The half life of carbon-14, despite its importance in dating, has an uncertainty of over 0.5%.

This 0.3% tritium measurement specifies the type of year used
This review avoids the question by using days