ISSN:0031-9228    

DOI:10.1063/1.3128574

出版商:AIP    

年代:1974

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.3128576

出版商:AIP    

年代:1974

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.3128578

出版商:AIP    

年代:1974

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.3128581

出版商:AIP    

年代:1974

数据来源: AIP

摘要:

Several groups are building electron microscopes with high voltage or high resolution or both that should distinctly extend their capabilities, particularly for observations in biology. One such group, which we recently visited at the Cavendish Laboratory, University of Cambridge, is building a 600‐kV conventional microscope that is expected to have a resolving power approaching 1 A˚, according to V. E. Cosslett and W. C. Nixon, who head the Cavendish team. Among those hoping to extend the frontiers of electron microscopy, besides the Cavendish, are groups at Oak Ridge National Laboratory, Cornell University, the University of Kyoto, the University of Nagoya, the University of Chicago and Arizona State University.

ISSN:0031-9228    

DOI:10.1063/1.3128583

出版商:AIP    

年代:1974

数据来源: AIP

摘要:

A recent experiment at Saclay suggests that to explain the behavior of 1‐GeV protons elastically scattering offHe4it is necessary to include the effect of correlations between the nucleons. When we recently visited Jacques Thirion at Saclay he told us of the results, which have just been reported in the 15 April issue ofPhys. Rev. Letters. Herman Feshbach (MIT) has found that the explanation of the Saclay results would require the inclusion of nucleon–nucleon correlations in the nuclear wave function.

ISSN:0031-9228    

DOI:10.1063/1.3128584

出版商:AIP    

年代:1974

数据来源: AIP

摘要:

Our rapidly expanding demand for fuel has exceeded the amount now available to us with existing technology. In the long run, nonexhaustible sources of energy will have to be found and exploited. Solar and geothermal energy are being explored, as are breeder reactors, but none of these sources is expected to furnish a significant amount of energy within the next 50 years. Fission reactors are now providing nuclear energy, but by the end of the century they will still contribute less than one quarter of the total energy needed (see figure 1). How shall we provide the needed energy for the next 30 to 50 years?

ISSN:0031-9228    

DOI:10.1063/1.3128585

出版商:AIP    

年代:1974

数据来源: AIP

摘要:

Since World War II physicists have played a prominent role in developing weapons policy and science policy for our country. This interaction with the government has been carried out largely behind the scenes, beyond the public view, by an elite group of established and renowned physicists working through such institutions as the President's Science Advisory Committee, the National Academy of Sciences and the JASON program of the Institute for Defense Analyses. By and large most physicists have had no role in this process. In the past the physics profession has not encouraged physicists to involve themselves in public policy. It has not provided reward and recognition for this kind of activity.

ISSN:0031-9228    

DOI:10.1063/1.3128586

出版商:AIP    

年代:1974

数据来源: AIP

摘要:

When physicists wish to communicate their work by means of publication, several considerations are weighed before choosing the appropriate journal. There is the matter of audience; of the probable delay between acceptance and publication; of article format (letter, review, standard research report). If the article is potentially controversial, the author may estimate its chances of being accepted by different journals. Considerations of national pride may sway the choice: An author may submit a work to a journal in his own country rather than to one that has a greater circulation and impact but is published in a foreign country.

ISSN:0031-9228    

DOI:10.1063/1.3128587

出版商:AIP    

年代:1974

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.3128588

出版商:AIP    

年代:1974

数据来源: AIP