ISSN:0031-9228    

DOI:10.1063/1.3068808

出版商:AIP    

年代:1975

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.3068809

出版商:AIP    

年代:1975

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.3068810

出版商:AIP    

年代:1975

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.3068811

出版商:AIP    

年代:1975

数据来源: AIP

摘要:

A feasible and fruitful way to study the spectroscopy of hypernuclei has been demonstrated by two experiments that applied counter techniques to measure hypernuclear reactions induced byK−mesons in flight. Such studies have been made possible in recent years by the development of intense, low‐momentumK−beams. They were further stimulated by the suggestions of theorists that production of hypernuclei byK−mesons in flight might favor the formation of states in which a nucleon of the parent nucleus is replaced by a lambda hyperon without otherwise changing the wave functions. Comparison of such a hypernuclear state with the corresponding nuclear state could yield useful information about the lambda–nucleon interaction.

ISSN:0031-9228    

DOI:10.1063/1.3068813

出版商:AIP    

年代:1975

数据来源: AIP

摘要:

The Fermi National Accelerator Laboratory has produced a 225‐GeV electron beam, a record energy for electrons. According to Thomas Nash, the NAL physicist responsible for the beam's development, beam intensity in the 100–150‐GeV range was about4×105 electronsper pulse, in agreement with predicted values for2×1011 protonsinjected per pulse. Intensity is expected to be over107 electronsper pulse for a full intensity proton beam of over1012 protonsper pulse. Of course, intensity at 225 GeV is much lower but is also within the range predicted. The electrons will be used as a source of “tagged” photons, rather than for themselves; NAL already has a muon beam for doing lepton physics, but the ability to produce photons of known energy is unique. Before the NAL beam was produced, the highest energy electron beams were at Serpukhov, USSR (35 GeV) and at the Stanford Linear Accelerator Center (20 GeV).

ISSN:0031-9228    

DOI:10.1063/1.3068815

出版商:AIP    

年代:1975

数据来源: AIP

摘要:

Crystallography is a marvelous science for a young man or woman beginning a research career, and I would like to tell them some reasons why embarking in that discipline can be a good choice.

ISSN:0031-9228    

DOI:10.1063/1.3068816

出版商:AIP    

年代:1975

数据来源: AIP

摘要:

Lasers generating wavelengths shorter than one angstrom unit would have many important applications. Ever since the discovery of the Mo¨ssbauer effect it has been realized that we would be able to stimulate nuclear transitions suitable for lasers in this range if we could prepare the population inversion on which lasers depend, and it has also long been known that some nuclear isomers are producible in a state of population inversion. Why then do we not yet have any operating gamma‐ray lasers?

ISSN:0031-9228    

DOI:10.1063/1.3068817

出版商:AIP    

年代:1975

数据来源: AIP

摘要:

Japan is building a major science city, Tsukuba Newtown for Research and Education, a project so massive that it took the government ten years to commit itself to the undertaking. Although construction at the site north of Tokyo has been under way for three years, the debate on Tsukuba still continues.

ISSN:0031-9228    

DOI:10.1063/1.3068818

出版商:AIP    

年代:1975

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.3068819

出版商:AIP    

年代:1975

数据来源: AIP