Development of a phoswich detector system for radioxenon monitoring

Hennig, Wolfgang; Warburton, W. K.; Fallu-Labruyere, A.; Sabourov, K.; Cooper, Matthew W.; McIntyre, Justin I.; Gleyzer, A.; Bean, Marc; Korpach, Ed; Ungar, R. Kurt; Zhang, W.; Mekarski, Pawel

doi:10.1007/s10967-009-0181-9

“…Four xenon radioisotopes are of interest and emit electrons and photons within a few nanoseconds [16] or less, with electron energies ranging from 0 to 915 keV and photons ranging from 30 keV X-rays to 250 keV gammas, see Table 1. As samples typically have very low activities, several radioxenon detector systems are making use of beta/gamma coincidence counting with scintillators to reduce background [17], [18], [19], [20]. More recently, silicon detectors have been used as the electron detector [21], [22] or for electron/X-ray coincidence counting [23] in order to improve the energy resolution of conversion electron (CE) peaks.…”

Section: Introductionmentioning

confidence: 99%

Network Time Synchronization of the Readout Electronics for a New Radioactive Gas Detection System

Hennig

¹

,

Thomas

²

,

Hoover

³

et al. 2019

IEEE Trans. Nucl. Sci.

View full text Add to dashboard Cite

In systems with multiple radiation detectors, time synchronization of the data collected from different detectors is essential to reconstruct multi-detector events such as scattering and coincidences. In cases where the number of detectors exceeds the readout channels in a single data acquisition electronics module, multiple modules have to be synchronized, which is traditionally accomplished by distributing clocks and triggers via dedicated connections.To eliminate this added cabling complexity in the case of a new radioactive gas detection system prototype under development at the French Atomic Energy Commission, we implemented time synchronization between multiple XIA Pixie-Net detector readout modules through the existing Ethernet network, based on the IEEE 1588 precision time protocol. The detector system is dedicated to the measurement of radioactive gases at low activity and consists of eight large silicon pixels and two NaI(Tl) detectors, instrumented with a total of three 4-channel Pixie-Net modules. Detecting NaI(Tl)/silicon coincidences will make it possible to identify each radioisotope present in the sample. To allow these identifications at low activities, the Pixie-Net modules must be synchronized to a precision well below the targeted coincidence window of 500-1000 ns. Being equipped with an Ethernet PHY compatible with IEEE 1588 and synchronous Ethernet that outputs a locally generated but system-wide synchronized clock, the Pixie-Net can operate its analog to digital converters and digital processing circuitry with that clock and match time stamps for captured data across the three modules. Depending on the network configuration and synchronization method, the implementation is capable to achieve timing precisions between 300 ns and 200 ps. Index Terms-Radioxenon, network time synchronization, precision time protocol, coincidence detection. W. Hennig (whennig@xia.com) and S. Hoover are with XIA LLC, Hayward, CA 94544 USA. V. Thomas and O. Delaune are with CEA, DAM,

show abstract

Xenon: Radionuclides

Saey¹

2005

Encyclopedia of Inorganic Chemistry

0

View full text Add to dashboard Cite

Radioxenon isotopes are noble gases mainly produced in nuclear fission e.g., uranium‐235. In nuclear medicine, xenon‐133 isotopes are used for measuring the physiological parameters of lung ventilation and to image the lungs. They are further used in isotonic solutions to image blood flow, particularly cerebral blood flow. Most radioactive isotopes of this element are produced by a nuclear fission reaction of uranium‐235, uranium‐238, or plutonium‐239. Xenon‐133 is the most abundant radioxenons observed in environmental samples, although contributions of 131m Xe and 135 Xe can be determined down to a few percent of the total β‐activity. The minimum detectable concentration (MDC) for 133 Xe in routine samples is about 1 mBq m −3 . This article will describe the production, applications, occurrence, and measurement of the various xenon isotopes.

show abstract

Xenon: Radionuclides

Saey

¹

2011

Encyclopedia of Inorganic and Bioinorganic Chemistry

0

View full text Add to dashboard Cite

Radioxenon isotopes are noble gases mainly produced in nuclear fission e.g., uranium‐235. In nuclear medicine, xenon‐133 isotopes are used for measuring the physiological parameters of lung ventilation and to image the lungs. They are further used in isotonic solutions to image blood flow, particularly cerebral blood flow. Most radioactive isotopes of this element are produced by a nuclear fission reaction of uranium‐235, uranium‐238, or plutonium‐239. Xenon‐133 is the most abundant radioxenons observed in environmental samples, although contributions of 131m Xe and 135 Xe can be determined down to a few percent of the total β‐activity. The minimum detectable concentration (MDC) for 133 Xe in routine samples is about 1 mBq m −3 . This article will describe the production, applications, occurrence, and measurement of the various xenon isotopes.

show abstract

Development of a phoswich detector system for radioxenon monitoring

Cited by 22 publications

References 10 publications

Network Time Synchronization of the Readout Electronics for a New Radioactive Gas Detection System

Network Time Synchronization of the Readout Electronics for a New Radioactive Gas Detection System

Xenon: Radionuclides

Xenon: Radionuclides

Contact Info

Product

Resources

About