Electron paramagnetic resonance dosimetric response of Li2SO4: CaSO4 mixture in mixed radiation environment - a case study
- 1. Radiation Safety Systems Division, Bhabha Atomic Research Centre, Mumbai (India)
- 2. Radio Chemistry Division, Bhabha Atomic Research Centre, Mumbai (India)
Description
Full text: A new Electron Paramagnetic Resonance (EPR) dosimetry system based on the EPR response of 2:1 mixture of Li2SO4: CaSO4 is presented. The dose response of the material irradiated with 60Co gamma radiation was found linear in the range 3 Gy to 52 kGy having signal repeatability within ± 1% . The dose response of the material irradiated in a mixed field of neutron flux of 3 x 1012 n-cm-2s-1 also showed linearity in response for 5 minute to 45 minutes of irradiation. Some of the EPR signal parameters investigated include: 1. Peak to peak signal intensity vs neutron fluence, Δt = 5 min to 60 min. 2. Peak to peak signal intensity vs microwave power signal fading, 3. Repeatability, batch homogeneity and zero dose response. It has been observed that the radical yield as manifested by the EPR signal response of the 2:1 sample mixture of Li2SO4: CaSO4 due to neutron irradiation is higher by a factor of 10 - 15 times than the response due to gamma irradiation
Additional details
Publishing Information
- Publisher
- Indian Society for Radiation Physics
- Imprint Place
- Mumbai (India)
- Imprint Title
- Fifteenth national symposium on radiation physics: nuclear radiation detectors present scenario and future trends
- Imprint Pagination
- 107 p.
- Journal Page Range
- p. 33
Conference
- Title
- 15. national symposium on radiation physics
- Acronym
- NSRP-15
- Dates
- 12-14 Nov 2003
- Place
- Mumbai (India)
INIS
- Country of Publication
- India
- Country of Input or Organization
- India
- INIS RN
- 35042481
- Subject category
- S61: RADIATION PROTECTION AND DOSIMETRY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- CALCIUM SULFATES; COBALT 60; DOSE-RESPONSE RELATIONSHIPS; ELECTRON SPIN RESONANCE; GAMMA RADIATION; LITHIUM SULFATES; NEUTRON FLUENCE; PERSONNEL DOSIMETRY
- Descriptors DEC
- ALKALI METAL COMPOUNDS; ALKALINE EARTH METAL COMPOUNDS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CALCIUM COMPOUNDS; COBALT ISOTOPES; DOSIMETRY; ELECTROMAGNETIC RADIATION; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTOPES; IONIZING RADIATIONS; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; LITHIUM COMPOUNDS; MAGNETIC RESONANCE; MINUTES LIVING RADIOISOTOPES; NUCLEI; ODD-ODD NUCLEI; OXYGEN COMPOUNDS; RADIATIONS; RADIOISOTOPES; RESONANCE; SULFATES; SULFUR COMPOUNDS; YEARS LIVING RADIOISOTOPES