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The physics of heavy metal X-ray flu...

Lee, Ja-Chin Audrey.

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The physics of heavy metal X-ray fluorescence in polymers: Model and measurement.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The physics of heavy metal X-ray fluorescence in polymers: Model and measurement./
作者:	Lee, Ja-Chin Audrey.
面頁冊數:	174 p.
附註:	Source: Dissertation Abstracts International, Volume: 66-11, Section: B, page: 6019.
Contained By:	Dissertation Abstracts International66-11B.
標題:	Physics, General. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3198045
ISBN:	9780542419904

The physics of heavy metal X-ray fluorescence in polymers: Model and measurement.
Lee, Ja-Chin Audrey.

The physics of heavy metal X-ray fluorescence in polymers: Model and measurement. - 174 p.

Source: Dissertation Abstracts International, Volume: 66-11, Section: B, page: 6019.

Thesis (Ph.D.)--Princeton University, 2006.

The analysis of plastics using energy dispersive x-ray fluorescence (EDXRF) differs from the traditional analysis of metal alloys in several key ways. Because polymers are mainly composed of light elements, the x-ray mass attenuation depth is higher. Polymer analysis requires a physical model with greater fidelity than Sherman's model: (1) infinite sample thickness is no longer valid and the incident and outgoing beams cannot be modeled as parallel beams, rather they exhibit substantial divergence, and (2) the overlap of the source beam and the detector acceptance angle where primary fluorescence occurs is no longer a simple plane at the surface but a more complicated volume and very sensitive to energy dispersion and beam angle geometry.

ISBN: 9780542419904Subjects--Topical Terms:

1018488
Physics, General.

The physics of heavy metal X-ray fluorescence in polymers: Model and measurement.
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500 $a Adviser: Peter Ramadge.
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520 $a The analysis of plastics using energy dispersive x-ray fluorescence (EDXRF) differs from the traditional analysis of metal alloys in several key ways. Because polymers are mainly composed of light elements, the x-ray mass attenuation depth is higher. Polymer analysis requires a physical model with greater fidelity than Sherman's model: (1) infinite sample thickness is no longer valid and the incident and outgoing beams cannot be modeled as parallel beams, rather they exhibit substantial divergence, and (2) the overlap of the source beam and the detector acceptance angle where primary fluorescence occurs is no longer a simple plane at the surface but a more complicated volume and very sensitive to energy dispersion and beam angle geometry.
520 $a This thesis presents theoretical two-dimensional calculations that modify the existing Sherman formulations for application to polymer analysis. In addition, measurements of reference polymers are compared to the theoretical calculations.
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