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## PowerPoint Slideshow about ' MUONS!' - coy

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- Detecting methods
- Muon half life and decay rate
- Muon decay data
- Problems with the data and muons

Protons from the cosmic rays interact with the atoms in the upper atmosphere and create a shower of particles which decay further to produce muons.

How muons are created.A flash is emitted

Decays into an electron

The scintillator detects the electron and emits a flash

Detecting methodsdN-Change in muons N(t)-Number of muons at given time.

λ-Decay rate dt-change in time

== hence t=

t=0 => No= Our = 0.388

N(t)=No Meaning that half life= 2.6

Muon Half Life and Decay Rate.- The PMT cable was faulty which fluctuated the results giving inaccurate results as it affected the rate of decay.
- Affecting flux rate.

“11’o’clock drop”

Problems with the dataWhen the person is standing up:

- 0.155*(6719073/24)*16=515129 (±0.5)
- When the person is lying down: 0.885*(6719073/24)*8=1982127 (±0.5)

0.5m

0.5m

Shoulder: 0.115m2

Standing: 0.885m2

0.23m

0.177m

How many muons pass through you everyday?They have a half life of 2.2µ yet they can still travel 660m.

- This is due to time dilation, as muons travel 98% the speed of light.
- Therefore, time slows down.

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