Decay Constant from Half-Life Calculator
Half-life→constantλperyearln2/t½,not solve t½ fromobservedamount/time. Actual independently identified specimens,matched units/taxon/cohort/source/edition/calibration and model applicability external;not individual identity,causation,diagnosis,absolute age certainty or validated forecast.
Description
A half-life can be expressed as a constant exponential decay rate on the same time basis.
A half-life can be expressed as a constant exponential decay rate on the same time basis.1
The supplied half-life must match the isotope and convention being modeled.
When to use Decay Constant from Half-Life Calculator
Use this tool to apply the stated decay constant from half-life calculator operation with an explicit input and unit basis.
How to use Decay Constant from Half-Life Calculator and how it works
- Establish the measurement basis and units described above.
- Enter actualApplicableHalfLifeYears and run the tool.
- Read result.value using the output meanings below.
- If input is rejected, correct the stated type, range, ordering or alignment issue and rerun; review successful results under the declared convention.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualApplicableHalfLifeYears | Applicable half life years, on the basis specified in the algorithm. | number | required; finite; strictly positive; further conditions in the algorithm |
Require positive half-life years. Divide natural logarithm of two by half-life; return inverse years.
decay constant per year = ln(2)/half-life years Apply the declared units, ordering and branch conditions.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the declared output fields. | object |
| result.value | Decay constant in inverse years. | number |
{
"input": {
"actualApplicableHalfLifeYears": 10
},
"output": {
"result": {
"value": 0.06931471805599453
}
}
}Limitations and assumptions
The output applies the declared operation to the values you supply. Establish the measurement basis, units, coefficients and any caller-selected rules before interpreting it. The tool does not independently collect or verify observations or decide whether a model or reference applies.
Supply explicit required fields with the documented types and dense aligned arrays. Unknown fields, wrong types and nonfinite numbers are rejected. Branch-specific constraints are explained above. A successful false boolean, negative signed difference, empty slice or unresolved tie is distinct from an input error. Very large inputs or outputs may be rejected by shared resource limits.
Alternative or Complementary methods
For a related operation, use U-Pb Age from Parent-Daughter Ratio Calculator. A single uranium–lead parent-daughter system can yield a conditional closed-system age after common lead and other applicable corrections have been established.
For a related operation, use Isochron Slope to Age Converter. An independently fitted isochron slope can be converted to a conditional age under the applicable decay system.
References
-
Decay Constant from Half-Life Calculator — tool.io
Similar or alternative tools
- U-Pb Age from Parent-Daughter Ratio Calculator
A single uranium–lead parent-daughter system can yield a conditional closed-system age after common lead and other applicable corrections have been established.
- Isochron Slope to Age Converter
An independently fitted isochron slope can be converted to a conditional age under the applicable decay system.