Doctoral Dissertations

Abstract

"The pulse-height defect (PHD) of high-energy heavy ions in silicon surface-barrier detectors can be divided into three components: (1) energy loss in the gold-surface layer, (2) a nuclear-stopping defect, and (3) a defect due to recombination of electron-hole pairs in the plasma created by the heavy ion. The plasma recombination portion of the PHD was the subject of this study using the variation of the PHD with (1) the angle of incidence of incoming heavy ions, and (2) changes in the detector bias. The Tandem Van de Graaff accelerator at Argonne National Laboratory was used to produce scattered beam ions (32S, 35Cl) and heavy target recoils (Ni, Cu, 98Mo, Ag, Au) at sufficient energies to produce a significant recombination defect. The results confirm the existence of a recombination zone at the front surface of these detectors and the significance of plasma recombination as a portion of the pulse-height defect"--Abstract, page ii.

Advisor(s)

Hardtke, Fred C.

Committee Member(s)

Manuel, O. (Oliver), 1936-
Webb, William H.
Edwards, D. R.
Bolon, Albert E., 1939-2006

Department(s)

Chemistry

Degree Name

Ph. D. in Chemistry

Sponsor(s)

U. S. Atomic Energy Commission

Publisher

University of Missouri--Rolla

Publication Date

1973

Pagination

xi, 127 pages

Note about bibliography

Includes bibliographical references (pages 120-126).

Rights

© 1973 Gregory Dan Smith, All rights reserved.

Document Type

Dissertation - Restricted Access

File Type

text

Language

English

Library of Congress Subject Headings

Heavy ion accelerators
Heavy ion collisions
Pulse height analyzers

Thesis Number

T 2993

Print OCLC #

6024590

Electronic OCLC #

911206719

Link to Catalog Record

Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.

http://laurel.lso.missouri.edu/record=b1066871~S5

Comments

This work was performed under the auspices of the U. S. Atomic Energy Commdssion at Argonne National Laboratory, while the author was on an Argonne Universities Association-Argonne National Laboratory Predoctoral Fellowship.

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