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Growth of Single Crystals of Mercuric Iodide (HgI2) in Spacelab III1,2

Published online by Cambridge University Press:  15 February 2011

Lodewijk Van Den Berg  and
Wayne F. Schnepple
Lodewijk Van Den Berg
Affiliation:
EG&G Energy Measurements Group, Santa Barbara Operations, 130 Robin Hill Road, Goleta, California, USA
Wayne F. Schnepple
Affiliation:
EG&G Energy Measurements Group, Santa Barbara Operations, 130 Robin Hill Road, Goleta, California, USA
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Abstract

Continued development of a system designed to grow crystals by physical vapor transport in the environment of Spacelab III will be described, with special emphasis on simulation of expected space conditions, adjustment of crystal growth parameters, and on board observation and control of the experiment by crew members and ground personnel.

A critical factor in the use of mercuric iodide for semiconductor detectors of x-rays and gamma-rays is the crystalline quality of the material. The twofold purpose of the Spacelab III experiment is therefore to grow single crystals with superior electronic properties as an indirect result of the greatly reduced gravity field during the growth, and to obtain data which will lead to improved understanding of the vapor transport mechanism

The experiments planned to evaluate the space crystals, including gamma-ray diffractometry and measurements of stoichiometry, lattice dimensions, mechanical strength, luminescense, and detector performance will be discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 9 , 1981 , 439
Copyright
Copyright © Materials Research Society 1982

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References

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