How does gamma ray spectroscopy work

Gamma Ray Spectroscopy

By applying a reverse biased voltage to the material, this charge can be pulled towards a positive electrode. The emitted positron will annihilate with an electron within the source material to produce back-to-back annihilation photons with energies equal to the rest-mass of an electron 511 keV. For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: This service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles.

A relatively high activity 137 Cs source was placed close to the detector, producing a very large count rate, and yielding the spectrum below.

how does gamma ray spectroscopy work

Energy Calibration of Germanium Gamma Ray Detectors This article will now detail the typical processes employed in gamma ray spectroscopy. This is used to prevent bots and spam. This article will now detail the typical processes employed in gamma ray spectroscopy. Ultimately, I used some of these skills later though. The same is true at 1324 keV for the summing of two cesium gamma rays.

This is used to identify particular browsers or devices when the access the service, and is used for security reasons. Five of the peaks were tagged in the MCA with their previously determined, known energies, thus calibrating the energy scale of the equipment. At around 40 keV, a number of x-rays were detected in the europium spectrum.

how does gamma ray spectroscopy work

In order to use gamma rays safely, the source and energy of their emission must be determined. It was nice to get an experience of more than one type of detector.

how does gamma ray spectroscopy work

An x-ray escape peak is also evident in the spectrum of 57 Co, which has many low-energy gamma rays. Gamma ray detectors are made from semiconductor materials, which contain atoms with orbiting electrons that can easily absorb the energy of a passing gamma ray.

A second contributor is incomplete charge collection, which increases with energy because more charge needs to be collected in the detector.

how does gamma ray spectroscopy work

The small band-gap requires the detector to be cooled to prevent noise from leakage current. The width of the annihilation peak is uncharacteristically large.

how does gamma ray spectroscopy work

Energy Resolution The percentage energy resolution is calculated using: The quantity C t is the total number of counts recorded per unit time, integrated over the whole spectrum. Nuclear physics discoveries utilizing gamma ray detectors continue to be made, and this trend looks set to continue well into the future.

What Is Gamma Ray Spectroscopy?

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