Review of heavy charged particle transport in MCNP6.2

Hughes, H.G.; James, Michael R.; Xu, Xiaobin

doi:10.1016/j.nima.2018.01.002

Cited by 11 publications

(5 citation statements)

References 34 publications

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“…In particular, the three codes do not agree for primary alpha emitted below 7 MeV. The main contributor to these discrepancies could be the stopping power for charged particles that can vary consequently from the different calculation codes as detailed in articles from the literature [27,28]. The new values can be used to predict doses from skin contamination for known activities of radionuclide of interest.…”

Section: Discussionmentioning

confidence: 99%

“…For simulations of alpha primary particles with GEANT4 and FLUKA, the standard physics model is considered. For MCNP [27], the Vavilov model is used. Tests are performed with MCNP turning off the Vavilov model and using instead the Continuous Slowing Down Approximation and with FLUKA turning on the IONFLUCT to activate ionization fluctuations.…”

Section: Particularity Of Alpha Modelsmentioning

confidence: 99%

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Skin dose contamination conversion coefficients. Benchmark with three simulation codes

et al. 2021

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Handling of radioactive material by operators can lead to contamination at the surface of the skin in case of an accident. The quantification of the dose received by the skin due to a contamination scenario is performed by means of dedicated dose coefficients as it is the case for other radiation protection dose quantities described in the literature. However, most available coefficients do not match realistic scenarios according to state-of-the-art of science and technology. Therefore, this work deals with dedicated dose conversion factors for skin contamination. Since there is an increasing demand on dose coefficients in general, these specific coefficients can be used for various calculations in radiation protection. In this work a method to evaluate such coefficients for the skin contamination dose related to photons, electrons, positrons, alpha and neutron particles is proposed. The coefficients are generated using Monte-Carlo simulations with three well established calculation codes (FLUKA, MCNP, and GEANT4). The results of the various codes are compared against each other for benchmarking purposes. The new dose coefficients allow the computation of the skin received dose, in the case of skin contamination scenario of an individual, taking into account the decay radiation of the radionuclides of interest. To benchmark the quantity derived here, comparisons of radionuclide contamination doses to the skin using the VARSKIN code available in the literature are performed with the results of this work.

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Section: Discussionmentioning

confidence: 99%

Section: Particularity Of Alpha Modelsmentioning

confidence: 99%

Skin dose contamination conversion coefficients. Benchmark with three simulation codes

et al. 2021

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“…MCNP6 is designed to track many particle types: not only N particles, but also charged particles including electrons, protons, and heavy ions over broad energy ranges. [24] In the ray-tracing method, the physical interactions between particles and the atoms of the target material are listed in a table. The energy (∆E i ) deposited in each voxel (i) of the digital model of the human body was recorded using…”

Section: Simulation Methodsmentioning

confidence: 99%

Monte Carlo calculation of the exposure of Chinese female astronauts to earth’s trapped radiation on board the Chinese Space Station

Guo¹,

Yan

Fang

et al. 2023

Chinese Phys. B

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With the development of China's crewed space mission, the space radiation risk for astronauts is increasingly prominent. The aim of this paper is to simulate the radiation doses in a Chinese female voxel phantom onboard the China Space Station (CSS) by Monte Carlo N Particle (MCNP) simulation. The absorbed dose, equivalent dose, and effective dose in voxel phantom and in its’ critical organs with different shielding of Tianhe core module are discussed. Then, the risk of space-radiation exposure is assessed by comparing the doses with the current risk limits at China (skin dose limit at short term low-earth-orbit missions) and NASA (NCRP Report No. 98) for female astronaut. The results obtained can be used to guide and optimize the radiation protection in the manned space missions.

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“…For aircraft altitude neutron sources, the study used the neutron spectrum measured at 200 g/cm 2 atmospheric depth (altitude 11.9 km) by Hess et al, as shown in Figure 6. For the proton source, the spectrum obtained through Roesler et al's FLUKA simulation at a 200 g/cm 2 atmospheric depth was used, as shown in Figure 6 (200 g/cm 2 corresponds to an altitude of 11.9 km) (Roesler et al, 1998;Zieb et al, 2018). The particle histories used were 10 9 for neutrons and 10 8 for protons.…”

Section: Weight (Kg/m 2 )mentioning

confidence: 99%

Functional lightweight protective clothing shielding design for constant radiation shielding of flight attendants and Monte Carlo simulation verification

Kim,

Youn

2023

Front. Mater.

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The use of easily accessible shielding suits for personal defense by flight attendants to reduce occupational cosmic radiation exposure is attracting increasing attention. However, to ensure activity in a limited area, the flexibility of the thin film must be considered. Although several process technologies to reduce the thickness of the shielding fabric are available, nanofiber production through electrospinning is the most effective, and it is attracting attention owing to its excellent reproducibility of the shielding performance. Therefore, in this study, a general sheet and a nanofiber shielding sheet were manufactured, and their shielding performance was compared. In addition, the shielding effect of the nanofiber shielding sheet was verified under aircraft conditions via Monte Carlo simulation. The shielding performance for neutrons and gamma rays, which are the most common sources of cosmic radiation, was 17.5% and 15.2%, respectively, with the Ba-133 and Cs-137 sources in the 0.3 mm shielding fabric. The absorbed dose change with the 5 mm shielding fabric was 7 μGy/d for neutrons and 4.3 μGy/d for protons. The shielding fabric developed in this study is expected to have an active shielding effect when used as personal protective equipment (clothing) by aircrew.

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Review of heavy charged particle transport in MCNP6.2

Cited by 11 publications

References 34 publications

Skin dose contamination conversion coefficients. Benchmark with three simulation codes

Skin dose contamination conversion coefficients. Benchmark with three simulation codes

Monte Carlo calculation of the exposure of Chinese female astronauts to earth’s trapped radiation on board the Chinese Space Station

Functional lightweight protective clothing shielding design for constant radiation shielding of flight attendants and Monte Carlo simulation verification

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