In:
International Journal of PIXE, World Scientific Pub Co Pte Ltd, Vol. 04, No. 01 ( 1994-01), p. 1-7
Abstract:
Detection limit for thin backing films is formulated. A polyvinyl formal film of ~ 0.14µm was bombarded with 3 MeV protons and continuos backgrounds were measured with a Si(Li) detector. A large constant background of a high energy region (≥6 keV ) was interpreted as the Compton tail due to the 440 keV γ-rays from the excited state of 23 Na which contaminated the surface of a carbon collimator placed just in front of a target. The detection limits of this thin film, under the condition of the beam spot size 6 mmϕ without collimator, are estimated for the elements of atomic number Z=10~55 and the minimum detection limit is calculated to be 4×10 −12 g for Z=28~34.
Type of Medium:
Online Resource
ISSN:
0129-0835
,
1793-6616
DOI:
10.1142/S0129083594000027
Language:
English
Publisher:
World Scientific Pub Co Pte Ltd
Publication Date:
1994
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