ISSN:0031-9228    

DOI:10.1063/1.3022660

出版商:AIP    

年代:1971

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.3022611

出版商:AIP    

年代:1971

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.3022613

出版商:AIP    

年代:1971

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.3022615

出版商:AIP    

年代:1971

数据来源: AIP

摘要:

The Brookhaven AGS, a proton synchrotron, has turned into a useful tool for studying electromagnetic interactions at high energy and momentum transfer. James Christenson, George Hicks, Leon Lederman, Peter Limon, Bernard Pope (Columbia) and Emilio Zavattini (CERN) have studied the massive muon pairs produced when high‐energy protons strike uranium nuclei (Phys. Rev. Lett.25, 1523, 1970). The experiment sets lower limits on the mass of the heavy photon proposed by T.D. Lee and Gian‐Carlo Wick (Columbia) and on the intermediate vector boson. And the experiment offers a new way of elucidating the scaling and pointlike behavior in the nucleon.

ISSN:0031-9228    

DOI:10.1063/1.3022617

出版商:AIP    

年代:1971

数据来源: AIP

摘要:

Solid‐state physicists have been talking about one‐dimensional systems for many years. Recently neutron‐scattering experiments have been performed on two different materials, which exhibit one‐dimensional behavior. Tetramethyl ammonium manganese chloride,(CD3)4NMnCl3,appears to act like a nearly ideal one‐dimensional antiferromagnet, down to at least 1.8 K, according to M. T. Hutchings and Gen Shirane (Brookhaven), Robert J. Birgeneau (Bell Labs) and S. L. Holt (University of Wyoming). Shirane, John Skalyo Jr (Brookhaven). S. A. Friedberg and H. Kobayashi (Carnegie–Mellon University) had earlier found another substance, cesium manganese chloride dihydrate,CsMnCl3⋅2H2O,that also had some one‐dimensional character, although not quite as striking.

ISSN:0031-9228    

DOI:10.1063/1.3022619

出版商:AIP    

年代:1971

数据来源: AIP

摘要:

Some facilities at the Jet Propulsion Laboratory are now opened to qualified investigators from the academic community. Researchers are expected to provide whatever funding they have, especially if projected laboratory costs are substantial; JPL is cooperating with these investigators in seeking funding. If a researcher has no source of funds and if laboratory costs are low, JPL can provide limited funding.

ISSN:0031-9228    

DOI:10.1063/1.3022621

出版商:AIP    

年代:1971

数据来源: AIP

摘要:

Since their invention of a dozen years ago lasers have become a major subject of interest to physicists. The original interest in laser systems as examples of a new and intriguing physical phenomenon continues unabated and has spurred researchers to develop an impressive assortment of lasers of different types and properties. John Emmett brings us up to date on these activities in his article "Frontiers of laser development" (page 24).

ISSN:0031-9228    

DOI:10.1063/1.4725748

出版商:AIP    

年代:1971

数据来源: AIP

摘要:

Early lasers had an extremely limited range of operational parameters, and so were of only limited usefulness. Now, however, laser action has been achieved in almost everything from semiconductor diodes to quinine water. What are some of the results of 12 years of laser research?

ISSN:0031-9228    

DOI:10.1063/1.3022623

出版商:AIP    

年代:1971

数据来源: AIP

摘要:

Now firmly established as a versatile tool in many branches of science, the laser has taken little more than a decade to develop from a research project itself into an instrument for the support of other research. The number of laser applications in industry, technology and pure science is now so great that no one article could possibly cover them all. Here I will be concentrating on scientific applications only, but even so I must adopt a limited scope. The choice of topics has been restricted by posing the question: Of the many scientific investigations conducted with help from lasers, which ones are feasible only because lasers are available? Applications that satisfy this criterion should be the ones that best emphasize the unique capabilities of the laser as a tool of science.

ISSN:0031-9228    

DOI:10.1063/1.3022624

出版商:AIP    

年代:1971

数据来源: AIP