Time Dilation's Effect on Radioactive Decay

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Discussion Overview

The discussion centers on the relationship between time dilation and radioactive decay, exploring whether time dilation affects the decay rates of radioactive atoms when they are accelerated to near light speeds. It also touches on the potential implications for studying atoms with short decay times and the influence of temperature on time dilation and decay rates.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants propose that time dilation does affect radioactive decay, suggesting that accelerating a radioactive atom to near light speeds would slow its decay.
  • Others affirm that time dilation impacts all physical processes, including radioactive decay, and provide examples such as cosmic-ray muons to illustrate this effect.
  • A participant questions whether temperature affects time dilation, positing that a "hot" atom, moving faster than a "cold" atom, might have a different decay rate.
  • Another participant agrees that temperature does affect time dilation, noting that while the effect is small at ordinary temperatures, it can have significant implications in specific contexts, such as the Mossbauer effect.
  • Some participants express confusion regarding the relationship between temperature and radioactive decay, referencing external sources that state temperature does not affect decay rates.

Areas of Agreement / Disagreement

Participants generally agree that time dilation affects radioactive decay, but there is contention regarding the influence of temperature on decay rates, with some asserting it does not have a significant effect while others argue it does.

Contextual Notes

The discussion highlights the complexity of the relationship between time dilation, temperature, and radioactive decay, with some assumptions and definitions remaining unresolved. The small magnitude of temperature effects on decay rates is noted, but not fully explored.

Who May Find This Useful

Readers interested in the interplay between relativistic physics and nuclear decay processes, as well as those exploring the implications of temperature on physical phenomena, may find this discussion relevant.

Sothh
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Does time dilation effect radioactive decay?

For example, if I speed a radioactive atom up to near light speeds, will its decay slow?

If so, could this be used to study atoms with a very short decay time?
 
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Sothh said:
Does time dilation effect radioactive decay?
It affects all physical processes.

For example, if I speed a radioactive atom up to near light speeds, will its decay slow?
Sure.
 
Does temperature effect time dilation? Since a "hot" atom will be moving more then a "cold" atom, with the speed difference change the decay of the atom?
 
A classic example of the original question is cosmic-ray muons, which would be unlikely to reach the Earth's surface except for time dilation. An accelerator version: http://www.lightandmatter.com/html_books/genrel/ch02/ch02.html , Example 6: Large time dilation

Sothh said:
Does temperature effect time dilation? Since a "hot" atom will be moving more then a "cold" atom, with the speed difference change the decay of the atom?
Yes. The effect is extremely small at ordinary temperatures, but for example it's big enough to make the Mossbauer effect impossible to observe in gases:

http://www.lightandmatter.com/html_books/genrel/ch01/ch01.html#Section1.5 , 1.5.6 The Pound-Rebka experiment

-Ben
 
Last edited by a moderator:
Thanks. That clears a lot up.

Everywhere else I have looked states that temperature does not effect radioactive decay.
 
Sothh said:
Thanks. That clears a lot up.

Everywhere else I have looked states that temperature does not effect radioactive decay.

The effect is extremely small, so that statement is an excellent approximation.
 

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