摘要:

The American Institute of Physics attained and celebrated in 1951 its twentieth anniversary. It seemed appropriate for the 1951 annual report to review the status of physics in a more careful and comprehensive way than usual. By contrast, the present report—for 1952—can be devoted to present problems, looking toward a better future for physics rather than marking past accomplishments.

ISSN:0031-9228    

DOI:10.1063/1.3061253

出版商:AIP    

年代:1953

数据来源: AIP

摘要:

Whenever a nuclear physicist observes a new effect caused by an atomic particle, he tries to make a counter out of it. After all, neutrons, protons, and their ilk are elusive little beasties and their detection and measurement form the life blood of experimental nuclear physics. The fact that charged particles can ionize gas molecules has been exploited to produce the ionization chamber, the proportional counter, and the Geiger counter. The fact that certain solids luminesce when bombarded with high‐speed particles made possible many of the early studies in nuclear physics where the observer peered at a zinc sulphide screen through a microscope and laboriously counted the minute light flashes caused by alpha particles striking the screen. Recently, a photomultiplier tube has supplanted the eye‐weary observer, resulting in the modern scintillation counter which plays an important role in all nuclear physics laboratories today. Thus it is only logical that attempts should be made to utilize the electrical effects produced in solids by ionizing particles—the solid state equivalent of an ionization chamber. Indeed, such effects have been sought for many years, yet it is only since World War II that new theory and new techniques have demonstrated that the crystal counter is actually a potentially useful measuring instrument. That its application is potential is an unfortunate consequence of the complexity of the solid state and the lack of an adequate understanding of the detailed electrical behavior of real crystals.

ISSN:0031-9228    

DOI:10.1063/1.3061225

出版商:AIP    

年代:1953

数据来源: AIP

摘要:

The past year has seen what may turn out to be the start of great progress in our understanding of meson problems. This was brought into focus at the Third Annual Rochester Conference on High‐Energy Physics, held December 18–20, 1952, and the topics discussed there form a convenient framework for presenting recent work in this field. The series of Rochester conferences, organized by R. E. Marshak and made possible by the support of a group of Rochester industries together, in the present instance, with that of the National Science Foundation, has consisted of informal sessions in which the latest experimental and theoretical results have been mulled over by representatives of most of the American and some of the foreign groups directly concerned with high‐energy physics.

ISSN:0031-9228    

DOI:10.1063/1.3061226

出版商:AIP    

年代:1953

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.3061229

出版商:AIP    

年代:1953

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.3061232

出版商:AIP    

年代:1953

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.3061236

出版商:AIP    

年代:1953

数据来源: AIP

摘要:

A packaged mixture of epsom salt and Glauber's salt, with a pinch of barium sulfate and other unidentified substances in minute quantity, has rocked the scientific community, created a new political uproar in Washington, and led to the forced resignation of the Director of the National Bureau of Standards, a man whose considerable scientific contributions to the nation during his 23‐year career in government service are a matter of public record.

ISSN:0031-9228    

DOI:10.1063/1.3061237

出版商:AIP    

年代:1953

数据来源: AIP

摘要:

The Joint Congressional Committeeon Atomic Energy, after being deadlocked for several weeks over the question of whether a new chairman should be elected from the Senate or from the House of Representatives, finally has settled the issue by naming Representative W. Sterling Cole of New York to fill the post. A bipartisan conference of leaders of both houses of Congress is reported to have approved Mr. Cole's election and to have established a policy whereby chairmanships of all joint committees shall be rotated every two years between the Senate and the House.

ISSN:0031-9228    

DOI:10.1063/1.3061239

出版商:AIP    

年代:1953

数据来源: AIP

摘要:

Oswald H. Blackwood,professor of physics at the University of Pittsburgh since 1927 and a member of the faculty for thirty‐three years, died on March 21st at the age of sixty‐five.

ISSN:0031-9228    

DOI:10.1063/1.3061240

出版商:AIP    

年代:1953

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.3061243

出版商:AIP    

年代:1953

数据来源: AIP