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MUONS!. How muons are created Detecting methods Muon half life and decay rate Muon decay data Problems with the data and muons. What are we going to talk about?.

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Presentation Transcript

What are we going to talk about

  • How muons are created

  • Detecting methods

  • Muon half life and decay rate

  • Muon decay data

  • Problems with the data and muons

What are we going to talk about?


How muons are created

How muons are created.


Feynman diagrams
Feynman diagrams upper atmosphere and create a shower of particles which decay further to produce


Detecting methods

Muon upper atmosphere and create a shower of particles which decay further to produce Enters

A flash is emitted

Decays into an electron

The scintillator detects the electron and emits a flash

Detecting methods


Muon half life and decay rate

dN-Change in upper atmosphere and create a shower of particles which decay further to produce 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.


Muon decay data

02/07/2014 upper atmosphere and create a shower of particles which decay further to produce – 03/07/2014

Muon decay data


03/07/2014 upper atmosphere and create a shower of particles which decay further to produce – 04/07/2014


Problems with the data

  • Systematic errors: upper atmosphere and create a shower of particles which decay further to produce

  • 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 data


How many muons pass through you everyday

When the person is standing up: upper atmosphere and create a shower of particles which decay further to produce

  • 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?


How many interact with you

Muons upper atmosphere and create a shower of particles which decay further to produce decayed in detector

Muons passed through your body

Total muons through detector

= 3946

How many interact with you


Problems with muons

  • They have a upper atmosphere and create a shower of particles which decay further to produce 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.

Problems with muons


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