Finding Resolution for PIPS Detector Using Am-241 Source

In summary, the conversation discusses the process of determining the resolution for a new PIPS detector. The speaker mentions having previous experience with a Ge detector and explains that the measurement for the PIPS detector is more challenging due to the closer proximity of the two peaks of the Am-241 source. They consider adjusting the gain and zero level of the electronics to improve the resolution, but note that increasing the gain may cause the peak to fall off the spectrum and adjusting the zero level does not seem to have an effect on the peaks.
  • #1
eXorikos
284
5

Homework Statement


Determining the resolution for a new PIPS (Passivated Implanted Planar Silicon) detector. I've done this earlier for a Ge detector, but that was easy because the two peaks of the Co-60 are far apart.

For this measurement we use the normal Am-241 source which has two alpha-peaks at 5442.80 keV and 5485.56 keV. The only things I now I can do for raising the resolution is adjusting the gain at the amplifier and adjusting the zero level of the ADC.

I can't turn the gain higher, because the peak will fall of the spectrum. Adjusting the zero level apparently does nothing to the peaks.

The electronics are just: PIPS-preamp-amp-ADC-Data system-Labview
 
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Related to Finding Resolution for PIPS Detector Using Am-241 Source

1. What is a PIPS detector?

A PIPS (Passivated Implanted Planar Silicon) detector is a type of semiconductor detector used for detecting and measuring ionizing radiation. It consists of a silicon wafer with a layer of insulating oxide on one side and a thin layer of metal on the other side, creating a diode structure. This type of detector is commonly used in nuclear physics research and medical imaging.

2. What is an Am-241 source?

Am-241 (Americium-241) is a radioactive isotope of americium, a synthetic element. It is commonly used as a source of alpha particles for various applications, including calibration of radiation detection instruments and medical imaging.

3. Why is it important to find resolution for PIPS detectors using Am-241 sources?

The resolution of a detector refers to its ability to distinguish between different types of radiation and their energies. In order to accurately measure radiation levels and identify specific types of radiation, it is crucial to have high resolution detectors. By finding resolution for PIPS detectors using Am-241 sources, we can ensure the accuracy and reliability of these detectors in various applications.

4. How is resolution for PIPS detectors using Am-241 sources measured?

The resolution of a detector is typically measured by its full width at half maximum (FWHM), which is the width of the peak of a radiation spectrum at half of its maximum height. In the case of PIPS detectors, the FWHM can be measured using different energy peaks produced by the Am-241 source, such as the 59.54 keV and 26.34 keV peaks.

5. What are some potential challenges in finding resolution for PIPS detectors using Am-241 sources?

One potential challenge is ensuring the accuracy and stability of the Am-241 source, as any fluctuations in its activity can affect the results. Additionally, the detector itself may have variations in its response to different energies, which can also impact the resolution measurements. Proper calibration and standardization techniques can help mitigate these challenges and improve the accuracy of the resolution measurements.

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