Study on Shielding Effectiveness of a Combined Radiation Shield for Manned Long Termed Interplanetary Expeditions

Zaman, Md. Abdullah Al; Nizam, Quazi Muhammad Rashed

doi:10.1016/j.jsse.2021.12.003

Cited by 8 publications

(3 citation statements)

References 20 publications

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“…When choosing the HZE component, we relied on the fact that 12 C 6+ is the most common nucleus after H + and 4 He 2+ in the composition of GCR [69], while the LET value was near the median value on the GCR LET spectrum measured on the Mars surface and during the Earth-Mars cruise [1]. Based on the dosimetric study, low-LET exposure will be predominant during spaceflight Moreover, during the realization of crewed deep-space missions, more advanced shielding will be used, which will also shift the particle spectrum towards the low-LET component and may reduce the equivalent dose by up to 30% [71,72]. The total equivalent dose in the used irradiation model (~0.8 Sv, for brain tissue, based on [73]) is relevant to that of a hypothetical 860-day Martian mission [70].…”

Section: Irradiation Procedures and Dosimetrymentioning

confidence: 88%

“…Based on the dosimetric study, low-LET exposure will be predominant during spaceflight [ 70 ]. Moreover, during the realization of crewed deep-space missions, more advanced shielding will be used, which will also shift the particle spectrum towards the low-LET component and may reduce the equivalent dose by up to 30% [ 71 , 72 ]. The total equivalent dose in the used irradiation model (~0.8 Sv, for brain tissue, based on [ 73 ]) is relevant to that of a hypothetical 860-day Martian mission [ 70 ].…”

Section: Methodsmentioning

confidence: 99%

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Combined Ionizing Radiation Exposure by Gamma Rays and Carbon-12 Nuclei Increases Neurotrophic Factor Content and Prevents Age-Associated Decreases in the Volume of the Sensorimotor Cortex in Rats

Kokhan,

Pikalov,

Chaprov

et al. 2024

IJMS

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In orbital and ground-based experiments, it has been demonstrated that ionizing radiation (IR) can stimulate the locomotor and exploratory activity of rodents, but the underlying mechanism of this phenomenon remains undisclosed. Here, we studied the effect of combined IR (0.4 Gy γ-rays and 0.14 Gy carbon-12 nuclei) on the locomotor and exploratory activity of rats, and assessed the sensorimotor cortex volume by magnetic resonance imaging-based morphometry at 1 week and 7 months post-irradiation. The sensorimotor cortex tissues were processed to determine whether the behavioral and morphologic effects were associated with changes in neurotrophin content. The irradiated rats were characterized by increased locomotor and exploratory activity, as well as novelty-seeking behavior, at 3 days post-irradiation. At the same time, only unirradiated rats experienced a significant decrease in the sensorimotor cortex volume at 7 months. While there were no significant differences at 1 week, at 7 months, the irradiated rats were characterized by higher neurotrophin-3 and neurotrophin-4 content in the sensorimotor cortex. Thus, IR prevents the age-associated decrease in the sensorimotor cortex volume, which is associated with neurotrophic and neurogenic changes. Meanwhile, IR-induced increases in locomotor activity may be the cause of the observed changes.

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Section: Irradiation Procedures and Dosimetrymentioning

confidence: 88%

Section: Methodsmentioning

confidence: 99%

Combined Ionizing Radiation Exposure by Gamma Rays and Carbon-12 Nuclei Increases Neurotrophic Factor Content and Prevents Age-Associated Decreases in the Volume of the Sensorimotor Cortex in Rats

Kokhan,

Pikalov,

Chaprov

et al. 2024

IJMS

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“…In this case, they can interact with the large amount of high-Z materials of the coils, starting hadronic showers which can deliver high doses to astronauts in the habitat module. This issue can be partially attenuated using passive shielding below the coils [51]. In addition, there is a considerable hazard for the crew, given by the risk of magnets quenching, a phenomenon potentially explosive that can happen if the coils loose the superconductive state in case of a fault of cryogenics.…”

Section: Active Shieldingmentioning

confidence: 99%

Foundations of radiological protection in space: the integrated multidisciplinary approach for next manned missions in deep space

Rizzo,

Borra,

Ciciani

et al. 2023

Eur. Phys. J. Plus

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Future manned missions in deep space toward Moon and Mars represent one of the greatest challenges for radiological protection, which task is to mitigate risks for human life raised by the hostile space radiation environment. The prolonged exposure of astronauts to cosmic rays, mainly ion fields of galactic or solar origin, with a large dynamical behavior in time and space with a wide range of kinetic energies, may result in an unacceptable life risk for the next deep space manned missions. Indeed, these ions can deliver significant doses to astronauts by directly hitting human tissues as well as exposing them to secondary particles (neutron and high-LET nuclear fragments) produced by their interaction with space habitat materials. This radiation environment is very different from work environments on Earth, for example, in nuclear power plants or nuclear medicine departments, for which radioprotection was historically developed. Workers on Earth are mainly exposed to photons ($$\textrm{X}$$ X -rays and $$\gamma$$ γ -rays), to $$\alpha$$ α - and $$\beta$$ β -particles and neutrons, with lower energies than those in space. This difference marks a significant change in the methodological approach of the radioprotection in space compared to that on ground. The review presents the basic principles of radiation protection in space compared to that on ground and the strategies that must be implemented to mitigate risks in manned missions. In particular, the principles of the integrated multidisciplinary approach proposed by NASA and other space agencies for human space exploration are also discussed, with emphasis on the synergies among the various countermeasures proposed.

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Plastics and Space Exploration

Olatunji

2024

Re-Envisioning Plastics Role in the Global Society

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Study on Shielding Effectiveness of a Combined Radiation Shield for Manned Long Termed Interplanetary Expeditions

Cited by 8 publications

References 20 publications

Combined Ionizing Radiation Exposure by Gamma Rays and Carbon-12 Nuclei Increases Neurotrophic Factor Content and Prevents Age-Associated Decreases in the Volume of the Sensorimotor Cortex in Rats

Combined Ionizing Radiation Exposure by Gamma Rays and Carbon-12 Nuclei Increases Neurotrophic Factor Content and Prevents Age-Associated Decreases in the Volume of the Sensorimotor Cortex in Rats

Foundations of radiological protection in space: the integrated multidisciplinary approach for next manned missions in deep space

Plastics and Space Exploration

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