Development of a chemical dosimeter for electron beam food irradiation
| dc.contributor | Moreira,Rosana G | |
| dc.creator | Rivadeneira, Ramiro Geovanny | |
| dc.date.accessioned | 2006-08-16T19:08:46Z | |
| dc.date.accessioned | 2017-04-07T19:51:47Z | |
| dc.date.available | 2006-08-16T19:08:46Z | |
| dc.date.available | 2017-04-07T19:51:47Z | |
| dc.date.created | 2003-05 | |
| dc.date.issued | 2006-08-16 | |
| dc.description.abstract | A chemical solution composed of paraffin wax, chloroform, and methyl yellow biological indicator was shaped into a solid 3-D apple phantom to determine absorbed dose from e-beams and X-rays. The purpose of this research was to determine the most uniform irradiation treatment on apple-phantoms (a complex shaped target) and GAFCHROMIC?? HD-810 films using electron beams from (1) a 2 MeV Van de Graaff (VDG) accelerator, (2) a 10 MeV Linear Accelerator (LINAC), and (3) X-rays from a 5 MeV LINAC. Irradiation with the VDG accelerator confirmed that tilting the apple-phantom yaxis towards the e-beam source by 90 degrees, 45, and 22.5 degrees resulted in more uniform treatment in both the methyl yellow apple phantom and HD-810 film. The phantoms were over-exposed at the top and bottom regions when their y-axis was oriented exactly parallel to the e-beam at 22.5-degrees. The 45-degree orientation ensured uniformity throughout the whole apple surface without overexposing it at the top and bottom. In contrast, the 90-degree orientation resulted in the least effective treatment with the bottom and top region not receiving any radiation. A 10 MeV dual e-beam showed uniform penetration from top to bottom in the HD-810 film and apple phantoms. The HD-810 film responded linearly with doses up to 1.5 kGy while the methyl yellow response was non-linear up to 0.5 kGy maximum. The X-ray irradiation completely penetrated the apple phantoms from top to bottom showing excellent lateral uniformity at different penetration depths. | |
| dc.identifier.uri | http://hdl.handle.net/1969.1/3908 | |
| dc.language.iso | en_US | |
| dc.publisher | Texas A&M University | |
| dc.subject | Electron Beam | |
| dc.subject | Food Irradiation | |
| dc.subject | Apple Phantom | |
| dc.subject | Biological Dosimeter | |
| dc.title | Development of a chemical dosimeter for electron beam food irradiation | |
| dc.type | Book | |
| dc.type | Thesis |