U235 Dating Calculator

Calculates the dating in the past from the ratio of Uranium 235 in natural uranium.

Current ratio of U235 in natural uranium is the same anywhere in the solar system.
Because the half-life is different with U238 and U235, the higher the percentage of U235 so retroactively.
U235 Dating
    1. ratio at the dating
    1. %
    1. ratio at the present
    1. %
    2. half-life
    3. byr(109)
    1. %
    2. half-life
    3. byr

The enrichment ratio of U235 to be used in a nuclear reactor is about 3%, it is the same as the existing ratio of U235 2 billion years ago.
The presence of natural reactor was predicted and found for this reason.

    U235 Dating
    [1-1] /1Disp-Num
    [1]  2018/04/10 11:41   Male / Under 20 years old / Elementary school/ Junior high-school student / Useful /
    Purpose of use
    Homework assignment


    Thank you for your questionnaire.
    Sending completion


    To improve this 'U235 Dating Calculator', please fill in questionnaire.
    Male or Female ?



    Purpose of use?
    Comment/Request (Click here to report a bug).Bug report (Click here to report questionnaire.)
    Calculation bug(Please enter information such as specific input values, calculation result, correct result, and reference materials (URL and documents).)
    Text bug(Please enter information such as wrong and correct texts)
    Your feedback and comments may be posted as customer voice.