Measurement of the spectra of multiply-scattered radiation in a medium irradiated with Co60 gamma rays
| dc.contributor.advisor | Cormack, D.V. | en_US |
| dc.contributor.committeeMember | Woods, R.J. | en_US |
| dc.creator | Derbowka, Robert Michael | en_US |
| dc.date.accessioned | 2012-07-06T11:35:51Z | en_US |
| dc.date.accessioned | 2013-01-04T04:42:33Z | |
| dc.date.available | 2013-07-06T08:00:00Z | en_US |
| dc.date.available | 2013-01-04T04:42:33Z | |
| dc.date.created | 1964-02 | en_US |
| dc.date.issued | 1964-02 | en_US |
| dc.date.submitted | February 1964 | en_US |
| dc.description.abstract | A knowledge of the spectral distribution of scattered radiation at a point is of value in planning effective radiation therapy and adequate personnel protection. Some spectra have been calculated theoretically or measured experimentally for a few particular irradiation conditions. In this investigation, the spectral distributions of multiply-scattered Co60 radiation were measured at depths of 2 cm., 5 cm., 10 cm. and 15 cm. in tissue-equivalent material with beam areas of 25 cm.2 and 100 cm.2. Total-scatter spectra, including both singly- and multiply-scattered radiation, were measured at various angles. Then, upon subtraction of the single-scatter spectra contribution from the total-scatter spectra, multiple-scatter spectra were obtained. The integrated and corrected multiple-scatter spectra were compared to corresponding spectra derived from data calculated by Bruce using the Monte Carlo method. The shapes of the experimental multiple-scatter spectra show fair agreement with Bruce's theoretical spectra. The greatest discrepancy between the spectra occurs in the low-energy end of the spectra. For all measured depths and beam areas the theoretical low-energy peaks appear at an energy from 10 to 30 KeV higher than that of the experimental peaks. | en_US |
| dc.identifier.uri | http://hdl.handle.net/10388/etd-07062012-113551 | en_US |
| dc.language.iso | en_US | en_US |
| dc.title | Measurement of the spectra of multiply-scattered radiation in a medium irradiated with Co60 gamma rays | en_US |
| dc.type.genre | Thesis | en_US |
| dc.type.material | text | en_US |
| thesis.degree.department | Physics | en_US |
| thesis.degree.discipline | Physics | en_US |
| thesis.degree.grantor | University of Saskatchewan | en_US |
| thesis.degree.level | Masters | en_US |
| thesis.degree.name | Master of Arts (M.A.) | en_US |