The response of thermoluminescence dosimeters to fast (14.7 MeV) and thermal neutrons

Rossiter, M J; Lewis, V. E.; Wood, J.

doi:10.1088/0031-9155/22/4/006

Cited by 12 publications

(2 citation statements)

References 10 publications

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“…Other direct spinal-habenula connections, where spinal lamina I injections of the anterograde tracer Phaseolus vulgaris leucoagglutinin (PHA-L) in the cat terminate in the lateral habenula, have also been reported (Craig 2003). Thus the data replicate connectivity in humans previously shown in animals, where IPn-habenula (Kuan et al 2007;Qin and Luo 2009;Rossiter et al 1977), RN-habenula (Araki et al 1988), Hypo-habenula (Goto et al 2005, etc. have been described (Bianco and Wilson 2009).…”

Section: Anatomical Connectivity Of Habenula In Humanssupporting

confidence: 80%

Mapping pain activation and connectivity of the human habenula

Shelton¹,

Pendse

Maleki³

et al. 2012

Journal of Neurophysiology

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The habenula, located in the posterior thalamus, is implicated in a wide array of functions. Animal anatomical studies have indicated that the structure receives inputs from a number of brain regions (e.g., frontal areas, hypothalamic, basal ganglia) and sends efferent connections predominantly to the brain stem (e.g., periaqueductal gray, raphe, interpeduncular nucleus). The role of the habenula in pain and its anatomical connectivity are well-documented in animals but not in humans. In this study, for the first time, we show how high-field magnetic resonance imaging can be used to detect habenula activation to noxious heat. Functional maps revealed significant, localized, and bilateral habenula responses. During pain processing, functional connectivity analysis demonstrated significant functional correlations between the habenula and the periaqueductal gray and putamen. Probabilistic tractography was used to assess connectivity of afferent (e.g., putamen) and efferent (e.g., periaqueductal gray) pathways previously reported in animals. We believe that this study is the first report of habenula activation by experimental pain in humans. Since the habenula connects forebrain structures with brain stem structures, we suggest that the findings have important implications for understanding sensory and emotional processing in the brain during both acute and chronic pain.

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Section: Anatomical Connectivity Of Habenula In Humanssupporting

confidence: 80%

Mapping pain activation and connectivity of the human habenula

Shelton¹,

Pendse

Maleki³

et al. 2012

Journal of Neurophysiology

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“…However, since the effect of the neutron dose is small, the relatively large systematic errors that have to be assumed in these calculations should not invalidate the results. Thus, the total (fast + thermal) neutron dose is computed according to the following formula: [16] 0.57 [17] 0.58 [18] 0.51 [19] 0.57 ± 7.4% 0.29 ± 13.8% [16] OSLD (Al2O3: C) 0.35 ± 0.03 [16] 0.35 ± 10%* 0.24 ± 25%* *For OSLD, in a first approach, thermal neutron response factors and neutron efficiency relative to 60 Co have been chosen identical to those of TLD-500 (Al 2 O 3 : C), with large uncertainties. Al 2 O 3 -based detectors are less sensitive to neutrons than TLD-400.…”

Section: Calculation Of Neutron Correctionsmentioning

confidence: 99%

Analysis and recent advances in gamma heating measurements in MINERVE facility by using TLD and OSLD techniques

Amharrak

Salvo

Lyoussi

et al. 2011

2011 2nd International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and Their Applications

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The objective of this study is to develop nuclear heating measurement methods in Zero Power experimental reactors. This paper presents the analysis of ThermoLuminescent Detector (TLD) and Optically Stimulated Luminescent Detectors (OSLD) experiments in the UO 2 core of the MINERVE research reactor at the CEA Cadarache.The experimental sources of uncertainties on the gamma dose have been reduced by improving the conditions, as well as the repeatability, of the calibration step for each individual TLD. The interpretation of these measurements needs to take into account calculation of cavity correction factors, related to calibration and irradiation configurations, as well as neutron corrections calculations. These calculations are based on Monte Carlo simulations of neutron-gamma and gamma-electron transport coupled particles. TLD and OSLD are positioned inside aluminum pillboxes.The comparison between calculated and measured integral gamma-ray absorbed doses using TLD, shows that calculation slightly overestimates the measurement with a C/E value equal to 1.05 ± 5.3 % (k = 2). By using OSLD, the calculation slightly underestimates the measurement with a C/E value equal to 0.96 ± 7.0% (k = 2).

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