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| Content Provider | Springer Nature Link |
|---|---|
| Author | Wang, Yiming Zhang, Yingying Wu, Ning Wu, Bingwei Liu, Yan Cao, Xuan Wang, Qian |
| Copyright Year | 2015 |
| Abstract | To develop a NaI (Tl) detector for in situ radioactivity monitoring in the marine environment and enhance the confidence of the probability of the gamma-spectrum analysis, Monte Carlo simulations using the Monte Carlo N-Particle ( MNCP ) code were performed to provide the response spectra of some interested radionuclides and the background spectra originating from the natural radionuclides in seawater recorded by a NaI (Tl) detector. A newly developed 75 mm × 75 mm NaI (Tl) detector was calibrated using four reference radioactive sources $^{137}$Cs, $^{60}$Co, $^{40}$K and $^{54}$Mn in the laboratory before the field measurements in seawater. A simulation model was established for the detector immersed in seawater. The simulated spectra were all broadened with Gaussian pulses to reflect the statistical fluctuations and electrical noise in the real measurement. The simulated spectra show that the single-energy photons into the detector are mostly scattering low-energy photons and the high background in the low energy region mainly originates from the Compton effect of the high energy ?-rays of natural radionuclides in seawater. The simulated background spectrum was compared with the experimental one recorded in field measurement and they seem to be in good agreement. The simulation method and spectra can be used for the accurate analysis of the filed measurement results of low concentration radioactivity in seawater. |
| Starting Page | 471 |
| Ending Page | 474 |
| Page Count | 4 |
| File Format | |
| ISSN | 16725182 |
| Journal | Journal of Ocean University of China |
| Volume Number | 14 |
| Issue Number | 3 |
| e-ISSN | 19935021 |
| Language | English |
| Publisher | Science Press |
| Publisher Date | 2015-05-14 |
| Publisher Place | Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Monte Carlo simulation marine radioactivity monitoring NaI (Tl) detector response spectra background spectra Oceanography Meteorology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Oceanography Ocean Engineering |
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