摘要:

The rapid expansion of plastics and other polymeric materials into the general consumer market over the last few years is now being followed by an increasing use of these materials in more severe engineering applications. It is becoming necessary therefore for engineers to develop a familiarity with these materials commensurate with that which they already have for more conventional engineering materials. In many ways the physical properties of polymeric materials are highly complex and their description and relation to structure present real problems. This article presents, in a simple way, some of the background to our current level of understanding of the relation between structure and mechanical properties; gives some examples of how polymeric materials are being used; and discusses some of the problems of designing in these materials, which present a real challenge to both the physicist and the engineer.

ISSN:0010-7514    

DOI:10.1080/00107516708202167

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

Radioactive substances may be present in air as dust, fume or vapour. very often attached to the natural aerosol. Many nuclides are produced in the upper atmosphere by the interaction of cosmic rays and atmospheric gases, and as a result of nuclear bomb tests. Radio-iodine has also been released accidentally from nuclear reactors.

ISSN:0010-7514    

DOI:10.1080/00107516708202168

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

Liquid metals have many fluid properties in common with non-metallic liquids, and many metallic properties in common with solid metals. In recent years experimental techniques familiar in solid-state physics have been helping to increase our empirical knowledge of fluid metals. At the same time attempts have been made to form conceptual links between liquid-state physics and metal physics. The article describes some of the current activity in this field, reviews some of the progress that has been made, and points out some of the major difficulties.

ISSN:0010-7514    

DOI:10.1080/00107516708202169

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

A historical survey of the development of solid-state detectors is given, and it is shown why semiconductor detectors are superior to the earlier crystal counters. The physical processes which occur during the detection of nuclear radiation in a solid-state device are considered in detail, and the merits of the reverse-biased semiconductor junction in silicon or germanium are set out. Factors which determine the energy resolution of such a detector are analysed, and also the effects of radiation damage. The preparation of such detectors is not treated in detail, but the physical principles on which the important types of detector depend are described. The final section surveys the field of applications of solid-state detectors in nuclear physics, radiochemical analysis, space research, medicine and biology.

ISSN:0010-7514    

DOI:10.1080/00107516708202170

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

ISSN:0010-7514    

DOI:10.1080/00107516708202171

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor