photon attenuation
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Author(s):  
Brunetti Cecilia ◽  
Alderotti Francesca ◽  
Pasquini Dalila ◽  
Stella Carlo ◽  
Gori Antonella ◽  
...  

Author(s):  
Christian Bäumer ◽  
Claus Maximilian Bäcker ◽  
Maurizio Conti ◽  
Pedro Fragoso Costa ◽  
Ken Herrmann ◽  
...  

2021 ◽  
Vol 3 (4) ◽  
pp. 1-5
Author(s):  
Sabri M. Shalbi ◽  
A. M. Al-Jarrah ◽  
M. S. Jaafar ◽  
Naser M. Ahmed

Mass attenuation coefficients of fly-ash based geopolymers fabricated with different proportions of barite are measured using a high-resolution NaI spectrometer detector. After fabrication, the samples were irradiated with gamma-rays emitted from point sources of 241Am and 137Cs. The measured experimental values are found to be consistent with theoretical calculations carried out using the XCOM program. Based on the results, the radiation shielding capacity of the geopolymers is found to increase with increase in barite proportion. In addition, the fly-ash based geopolymers fall within the internationally established range and are thus acceptable for use as radiation protection devices.


Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3772
Author(s):  
M. I. Sayyed ◽  
Badriah Albarzan ◽  
Aljawhara H. Almuqrin ◽  
Ahmed M. El-Khatib ◽  
Ashok Kumar ◽  
...  

The gamma radiation shielding ability for CaO-K2O-Na2O-P2O5 glasses were experimentally determined between 0.0595 and 1.41 MeV. The experimental MAC results were compared with theoretical results obtained from the XCOM software to test the accuracy of the experimental values. Additionally, the effect of increasing the P2O5 in the glass composition, or reducing the Na2O content, was evaluated at varying energies. For the fabricated glasses, the experimental data strongly agreed with the XCOM results. The effective atomic number (Zeff) of the fabricated glasses was also determined. The Zeff values start out at their maximum (12.41–12.55) at the lowest tested energy, 0.0595 MeV, and decrease to 10.69–10.80 at 0.245 MeV. As energy further increases, the Zeff values remain almost constant between 0.344 and 1.41 MeV. The mean free path (MFP) of the fabricated glasses is investigated and we found that the lowest MFP value occurs at the lowest tested energy, 0.0595 MeV, and lies within the range of 1.382–1.486 cm, while the greatest MFP can be found at the highest tested energy, 1.41 MeV, within the range of 8.121–8.656 cm. At all energies, the KCNP40 sample has the lowest MFP, while the KCNP60 sample has the greatest. The half value layer (HVL) for the KCNP-X glasses is determined. For all the selected energies, the HVL values follow the order of KCNP40 < KCNP45 < KCNP50 < KCNP55 < KCNP60. The HVL of the KCNP50 sample increased from 0.996 to 2.663, 3.392, 4.351, and 5.169 cm for energies of 0.0595, 0.245, 0.444, 0.779, and 1.11 MeV, respectively. The radiation protection efficiency (RPE) results reveal that decreasing the P2O5 content in the glasses improves the radiation shielding ability of the samples. Thus, the KCNP40 sample has the best potential for photon attenuation applications.


2021 ◽  
Vol 182 ◽  
pp. 109331
Author(s):  
Frederick C. Hila ◽  
Alvie Asuncion-Astronomo ◽  
Cheri Anne M. Dingle ◽  
Julius Federico M. Jecong ◽  
Abigaile Mia V. Javier-Hila ◽  
...  
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