Chapter 3. Gamma Irradiation Plants

Craven, Emily; Schlecht, John; Stein, R. L.

doi:10.1039/9781788010252-00028

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“…Pallet gamma irradiators have been used for phytosanitary irradiation purposes (Craven, Schlecht, & Stein, 2018). The irradiator accepts pallets whose dimensions of 120 cm long x 100 cm wide x 220 cm high.…”

Section: Dose Distribution Of Pinewood Exposed To Gamma Raysmentioning

confidence: 99%

Determination of best pine wilt disease treatment using irradiation

Kim

Moreira

Castell‐Perez

2019

Journal of Radiation Research and Applied Sciences

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Although fumigation of affected trees is the common control methodof the pinewood nematode, a causal agent of pine wilt disease,the treatment causes environmental problems and is expensive.This study assessed the effectiveness of irradiation technology.The physical properties and atomic composition of pinewood wereobtained from the literature as input to a radiation transport code(MCNP5). Radiation energies were 10 MeV electron beam and1.25 MeV gamma rays. For 10 MeV e-beams, penetration depthwas 13.4 cm at onedirectional irradiation. When the pinewooddiameter was less than 17.5 cm, double-beam irradiation sufficedto ensure extermination of the larva. When pinewood diameterwas slightly less than 42 cm, a half-cut sample was sufficient toachieve the dose required under double-beam irradiation. For1.25 MeV gamma rays, the whole sample absorbed the dose. APVC pipe improved dose absorption at the bark region. A palletirradiator was also evaluated. The double-beam configuration waseffective (lower DURs). Although the pine sawyer beetle, a vector ofthe nematode, penetrates from the bark and moves into the stem,treatment with 1.25 MeV gamma rays could easily control them.Irradiation technology is an effective alternative to treat nematodeinfestedpinewood without unwanted environmental problems. ARTICLE HISTORY

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Section: Dose Distribution Of Pinewood Exposed To Gamma Raysmentioning

confidence: 99%

Determination of best pine wilt disease treatment using irradiation

Kim

Moreira

Castell‐Perez

2019

Journal of Radiation Research and Applied Sciences

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“…High-dose radiation has been widely applied in nondestructive inspection, medical product sterilization, materials processing and synthesis, − agriculture, , food processing, , and so on, which significantly improves the qualities of industry, medicine, agriculture, and food. In these fields, the radiation dose should be regulated rationally for various quality controls and purposes .…”

Section: Introductionmentioning

confidence: 99%

High-Sensitivity and Wide-Linear-Range Thermoluminescence Dosimeter LiMgPO₄:Tm,Tb,B for Detecting High-Dose Radiation

et al. 2019

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High-sensitivity and wide-linear-range thermoluminescence dosimeter (TLD) is of importance for detecting highdose radiation in industry, medicine, and agriculture as well as materials and food processing. In this work, we synthesize a series of LiMgPO 4 doped with Tm 3+ , Tb 3+ , and B 3+ via a hightemperature solid-state reaction technique. To observe the effect of dopants, we first investigate the structure by Rietveld refinement of high-quality X-ray diffraction (XRD) data and then study the thermoluminescence (TL) properties of samples radiated by β-rays in detail. The TL signal of LiMgPO 4 :Tm,Tb,B is originated from Tm 3+ 4f−4f transitions. The kinetic parameters are obtained through fitting the TL glow curve based on the general-order kinetics model, revealing that the dominant TL peak at ∼323 °C is related to ∼1.49 eV trap. Through constructing the vacuum-referred binding energy (VRBE) scheme, we uncover that this deep trap mainly originates from the Tb 3+ dopant acted as the captured center of free hole. After codoping 0.6% B 3+ , the sensitivity of sample as TLD increases ∼170%. According to the radiation dose-dependent TL intensities, the sensitivity of LiMgPO 4 :Tm,Tb,B is about 200% larger than that of the commercial LiF:Mg,Cu,P at 0.08 Gy, and more sensitive at higher dose. Moreover, the studied sample has wider linear range (up to 10 000 Gy) toward high-dose side, good reproducibility (RSD ∼ 4.6%), and weak fading (∼8% after 34 days), and therefore has potential application as TLD for monitoring high-dose radiation.

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“…A instalação de um irradiador de cobalto-60 consiste em um container de armazenamento blindado (seco ou úmido) para o armazenamento da fonte de radiação, um mecanismo de içamento de fonte, uma blindagem de radiação em torno da sala de irradiação, uma sala de controle, recipientes de produto, um sistema de transporte do produto através do labirinto de blindagem, um sistema de intertravamento de segurança e controle, áreas para carga e descarga de produtos e equipamento de serviço de apoio (SZCZAWIŃSKA, 2017;CRAVEN et al, 2018).…”

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Efeito da radiação gama na degradação de pesticidas (azoxistrobin e carbendazim) em morango

Ciarrocchi¹

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Chapter 3. Gamma Irradiation Plants

Cited by 3 publications

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Determination of best pine wilt disease treatment using irradiation

Determination of best pine wilt disease treatment using irradiation

High-Sensitivity and Wide-Linear-Range Thermoluminescence Dosimeter LiMgPO₄:Tm,Tb,B for Detecting High-Dose Radiation

Efeito da radiação gama na degradação de pesticidas (azoxistrobin e carbendazim) em morango

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Chapter 3. Gamma Irradiation Plants

Cited by 3 publications

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Determination of best pine wilt disease treatment using irradiation

Determination of best pine wilt disease treatment using irradiation

High-Sensitivity and Wide-Linear-Range Thermoluminescence Dosimeter LiMgPO4:Tm,Tb,B for Detecting High-Dose Radiation

Efeito da radiação gama na degradação de pesticidas (azoxistrobin e carbendazim) em morango

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High-Sensitivity and Wide-Linear-Range Thermoluminescence Dosimeter LiMgPO₄:Tm,Tb,B for Detecting High-Dose Radiation