How is the Bethe-Bloch formula used in gamma-ray photon detection?

In summary, the Bethe-Bloch formula is used to determine the energy of a gamma-ray photon stopped in a spark chamber.
  • #1
FNL
14
0
can some one give me a link or an article or his argument which Explain how the Bethe-Bloch formula is used to determine the energy of a gamma-ray photon stopped in a spark-chamber detector.

thanks
 
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  • #2
a gamma ray photon will undergo pair production, and it is the total amount of energy from those electrons and positrons that will be collected in an EM-calorimeter.
 
  • #3
malawi_glenn said:
a gamma ray photon will undergo pair production, and it is the total amount of energy from those electrons and positrons that will be collected in an EM-calorimeter.

yes , it will be clear
thank you
 
  • #4
malawi_glenn said:
a gamma ray photon will undergo pair production, and it is the total amount of energy from those electrons and positrons that will be collected in an EM-calorimeter.

Is this really what is occurring in such a spark chamber? From what I've understood, all it requires is that the gamma ray causes ionization in the active gas in the spark chamber. Then by looking at the energy loss of these charge ions, one can apply the Bethe-Bloch to deduce the total energy of all the created charge particle and deduce the energy of the gamma photon that cause this ionization in the first place.

In such a low-density gas, one seldom creates pair production.

Zz.
 
  • #5
Here's a brief article on a spark chamber.
http://eppog.web.cern.ch/eppog/Resources/SparkChamber.html [Broken]
Another discussion - http://www.ep.ph.bham.ac.uk/index.php?page=general/outreach/SparkChamber/index

Firstly, pair production requires gamma ray energy of at least 1.0221 MeV. PP would be possible in the boundaries and plates/electrodes.

Secondly, I believe Compton scattering is more likely than pair prodcution, and then there is the photo-electric effect.

Is it inferred that the gamma-rays are much greater than 1.0221 MeV?
 
Last edited by a moderator:
  • #6
Yes ZapperZ, that is correct of you, forgot to read the last word 'spark chamber' properly :)
 
  • #7
Thanks
 

What is gamma-ray photon detection?

Gamma-ray photon detection is the process of detecting and measuring gamma-ray photons, which are high-energy electromagnetic radiation particles emitted during radioactive decay or nuclear reactions.

How is gamma-ray photon detection used in scientific research?

Gamma-ray photon detection is used in a variety of scientific fields, including astrophysics, nuclear physics, and medical imaging. It allows scientists to study the properties of gamma-ray emissions, identify sources of gamma rays, and understand the behavior of matter at the atomic and subatomic level.

What types of technologies are used for gamma-ray photon detection?

There are several types of technologies used for gamma-ray photon detection, including scintillation detectors, semiconductor detectors, and gas-filled detectors. Each type has its own advantages and is suited for different applications.

How sensitive are gamma-ray photon detectors?

Gamma-ray photon detectors are extremely sensitive and can detect even a single photon at high energies. However, the sensitivity can vary depending on the type of detector and its design.

What are the potential uses of gamma-ray photon detection in everyday life?

Gamma-ray photon detection has numerous potential uses in everyday life, including medical imaging for diagnosing and treating diseases, security screening for detecting radioactive materials, and environmental monitoring for detecting radiation levels in the environment.

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