Design and calibration of a low energy (150 keV) γ-ray collimation system for the Harwell whole-body monitor

1988 ◽  
Vol 264 (2-3) ◽  
pp. 453-463
Author(s):  
J.N. Pritchard ◽  
A. Black
Keyword(s):  
Low Energy ◽  
Whole Body ◽  
Collimation System ◽  
Γ Ray

scholarly journals Low energy dark current collimation system in single-pass linacs

2018 ◽  
Vol 21 (2) ◽  
Author(s):  
S. Bettoni ◽  
P. Craievich ◽  
M. Pedrozzi ◽  
M. Schaer ◽  
L. Stingelin
Keyword(s):  
Dark Current ◽  
Low Energy ◽  
Single Pass ◽  
Collimation System

The miso low energy γ-ray telescope

1979 ◽  
Vol 158 ◽  
pp. 595-604 ◽  
Author(s):  
R.E. Baker ◽  
R.C. Butler ◽  
A.J. Dean ◽  
G. Di Cocco ◽  
N.A. Dipper ◽  
...  
Keyword(s):  
Low Energy ◽  
Γ Ray

Perspectives of Silicon Detectors for X and Low Energy Gamma Ray Spectroscopy in Whole-Body Counting

1995 ◽  
Vol 61 (1-3) ◽  
pp. 149-152 ◽  
Author(s):  
P. Pihet ◽  
P. Berger ◽  
D. Franck ◽  
Ph. Berard ◽  
L. Le Noir de Carlan ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Low Energy ◽  
Whole Body ◽  
Silicon Detectors ◽  
Gamma Ray Spectroscopy ◽  
Energy Gamma ◽  
Body Counting ◽  
Whole Body Counting

The decay of 237Np

1976 ◽  
Vol 54 (13) ◽  
pp. 1409-1420 ◽  
Author(s):  
M. Skalsey ◽  
R. D. Connor
Keyword(s):  
Level Scheme ◽  
Low Energy ◽  
Coincidence Data ◽  
Γ Rays ◽  
Γ Ray

The decay of 237Np has been investigated from singles and coincidence γ-ray spectra acquired using Ge(Li) detectors. Forty-two γ rays have been observed and all but one have been placed in the level scheme of 233Pa. The presence of unobserved transitions of low energy has been confirmed by the coincidence data. Five new γ rays are reported here and a new level in 233Pa at 303.8 keV is proposed.

X-RAY COLLIMATOR DESIGN USING MONTE CARLO SIMULATIONS

2013 ◽  
Vol 25 (06) ◽  
pp. 1350054
Author(s):  
Eun Young Han ◽  
Richard Clarkson ◽  
Sunil Sharma ◽  
Peter M. Corry ◽  
Eduardo G. Moros ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Small Animal ◽  
Low Energy ◽  
Aperture Size ◽  
Beam Size ◽  
Dose Distributions ◽  
X Ray ◽  
Collimation System ◽  
Acceptable Agreement ◽  
Ebt2 Film

The purpose of this study was to apply Monte Carlo (MC) based simulations to design a new collimation system to achieve a larger beam size (2 ± 0.1 cm) and tight penumbra (< 1 mm) with a kV X-ray small animal irradiator. The BEAMnrc and DOSXYZnrc MC-based programs were adapted to simulate the system. First the aperture of the primary collimator was expanded until the desired size of the beam was obtained. Subsequently, the beam was trimmed by reducing the aperture size of the secondary collimator in order to eliminate low energy scattered photons and sharpen the penumbra. Finally, the new collimator was constructed and the resultant dose distributions were evaluated with EBT2 film measurements. From the MC computed dose profiles, a 2.1 cm FWHM (1.9 cm width at 95% of the dose) and a sharp penumbra (< 1.0 mm) at 1.0 cm depth in water were obtained. Dose distribution comparisons between the EBT2 film measurements and the MC calculations showed acceptable agreement. MC-based calculation is an effective tool to expedite the creation of new collimator designs and avoid costly machining.

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