Autonomous NaI(Tl) gamma-ray spectrometer for in situ underwater measurements

Naumenko, A. V.; Andrukhovich, S. K.; Kabanov, V. V.; Kabanau, Dzmitry M.; Kurochkin, Y. A.; Martsynkevich, B. A.; Shoukavy, Dz.; Шпак, П. В.

doi:10.1016/j.nima.2018.08.001

Cited by 21 publications

(4 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…That is, before 15 °C, the peak position channel address increases with the increase of temperature, and after 15 °C, the peak position channel address decreases with the increase of temperature. The relationship law range of −5 °C to 50 °C is the same as in Naumenko et al [20]; after 20 °C, it follows the same relationship law as the experiment data in Mitra et al [21]. However, it is different from the linear function relationship law in Hung et al [22] and Chen et al [23].…”

Section: Relationship Law Between Temperature and Peak Position Chann...supporting

confidence: 57%

A New Method for the Correction of Spectrum Drift Caused by Temperature Changes When Using a NaI(Tl) Seawater Radioactivity Sensor

Shi,

Zhang,

Feng

et al. 2024

JMSE

View full text Add to dashboard Cite

The seawater radioactivity sensor based on the NaI(Tl) scintillation crystal detection method is prone to spectrum drift due to environment temperature changes during actual measurement, which pose difficulties in the activity analysis of seawater radionuclides. This paper adopts experiment design and analysis methods to study the relationship laws between temperature and peak position channel address and between gain and the peak position channel address. On the basis of studying and summarizing the two relationship laws of the NaI(Tl) seawater radioactivity sensor, a spectrum drift correction method combining gain adjustment and spectrum processing is proposed. Laboratory air and water environment experiments verify that the peak position channel address drift after air environment correction does not exceed ±2 channels, and after water environment correction does not exceed ±1 channel. Long-term verification experiments at the seawater work site have shown that this correction method can effectively correct the spectrum drift of the NaI(Tl) seawater radioactivity sensor and meet the requirements of long-term automatic operations at sea for the measured spectrum.

show abstract

Section: Relationship Law Between Temperature and Peak Position Chann...supporting

confidence: 57%

A New Method for the Correction of Spectrum Drift Caused by Temperature Changes When Using a NaI(Tl) Seawater Radioactivity Sensor

Shi,

Zhang,

Feng

et al. 2024

JMSE

View full text Add to dashboard Cite

show abstract

“…To obtain timely radiation data for emergency responses, as in the case of the Fukushima Daiichi nuclear accident [ 3 ], on-site radionuclide identification techniques for underwater environments have been developed. Most techniques focused on gamma-ray spectrometry based on NaI(Tl) crystal as a high-energy gamma-ray wavelength shifter [ 4 , 5 , 6 , 7 , 8 ]. In addition to NaI(Tl) crystals, other materials such as LaBr 3 (Ce) [ 9 ], Gd 3 Al 2 Ga 3 O 12 (Ce) [ 10 ], and CeBr 3 [ 11 ] have been tested to improve optical properties such as energy resolution, light yield, and/or stability.…”

Section: Introductionmentioning

confidence: 99%

Gamma-Ray Sensor Using YAlO3(Ce) Single Crystal and CNT/PEEK with High Sensitivity and Stability under Harsh Underwater Conditions

Lee

Kim

2021

Sensors

View full text Add to dashboard Cite

A new gamma-ray sensor, which could be employed in harsh underwater conditions, was developed using YAlO3(Ce) single crystal and carbon nanotube reinforced polyetheretherketone (CNT/PEEK). The sensor is compact, highly sensitive and stable, by providing real-time gross counts and an accumulated spectrum for fresh, saline, or contaminated water conditions. The sensor was tested in a water tank for quantification of the limit of detections. The Φ51 × 51 mm2 YAlO3(Ce) crystal exhibits a nearly perfect proportionality with a correlation of over 0.999 in terms of light yield per energy and possesses a high energy resolution. The chemically stable CNT/PEEK window material further enhances the detection efficiency by minimizing the background counts from penetrating gamma-rays. Data timeliness was obtained for regulation-based minimum detectable activity targets within 300 s. For a source-detector distance of up to 300 mm in water, the gross counts demonstrate the existence of radionuclides (Cs-137 and Co-60), owing to their higher efficiency (max. ~15 times) than those of the photopeak counts. Such differences between efficiency values are more likely in water than in air because of the high density of water, resulting in an increased build-up of scattered photons. The proposed sensor is suitable for autonomous underwater systems.

show abstract

“…The most common ones involve the deployment of NaI(Tl) scintillators (see e.g. [6][7][8][9][10][11]), with the main limitation of such approaches residing in the generally poor energy resolution of the scintillator.…”

Section: Introductionmentioning

confidence: 99%

Characterization of a CZT-based spectrometer for underwater operation via simulations and experiments

Siltzovalis,

Lagaki,

Madesis

et al. 2024

J. Inst.

View full text Add to dashboard Cite

The harsh environmental conditions in the marine environment pose various constraints on developing efficient instruments to carry out long-term, in situ radioactivity measurements. In addition, the strong attenuation of γ-rays in the water medium, makes remote sensing of such radiation a challenging task. In the present work, we report on the efforts to find the optimal characteristics and deployment scenarios of a new prototype γ-ray instrument based on a small-size CZT crystal enclosed in seal-tight housing to be deployed for operation in large depths. Lab experiments and detailed Monte Carlo simulations were combined to validate the actual crystal dimensions, determine its efficiency and energy resolution, as well as establish the minimum detectable activity values of the instrument in different configurations and scenarios.

show abstract

Autonomous NaI(Tl) gamma-ray spectrometer for in situ underwater measurements

Cited by 21 publications

References 26 publications

A New Method for the Correction of Spectrum Drift Caused by Temperature Changes When Using a NaI(Tl) Seawater Radioactivity Sensor

A New Method for the Correction of Spectrum Drift Caused by Temperature Changes When Using a NaI(Tl) Seawater Radioactivity Sensor

Gamma-Ray Sensor Using YAlO3(Ce) Single Crystal and CNT/PEEK with High Sensitivity and Stability under Harsh Underwater Conditions

Characterization of a CZT-based spectrometer for underwater operation via simulations and experiments

Contact Info

Product

Resources

About