Conversion of Half-life Years to Seconds

["Nielsen, Erik" <NielseEC@NV.DOE.GOV>]

This is a good question.

A number of conversion sites give various values:



http://www.onlineconversion.com/time.htm

1 year = 31,536,000 seconds



http://www.convert-me.com/en/convert/time

1 year = 31,557,600 seconds though this site specifically states that a

Julian year is an approximate measure and does not have an exact value.



http://www.infoplease.com/pages/unitconversion.html?unittype=time&grp=common

&grp=common

 1 year = 5.2594877 x 10^5 minutes and also indicates that this is an

approximate value



I hope someone at NIST has a definative value for the purposes of half-life.

For your purposes I would think that  the uncertainties of the half-life

value would swamp the uncertainty of the conversion from years to seconds.  



Erik C. Nielsen

Senior Scientist

Bechtel Nevada - Remote Sensing Laboratory

P.O. Box 98521, M/S RSL-24

Las Vegas, NV 89193



http://www.nv.doe.gov/programs/frmac/



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