ISSN:0031-9228    

DOI:10.1063/1.2408541

出版商:AIP    

年代:1904

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.1752398

出版商:AIP    

年代:1904

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.1752399

出版商:AIP    

年代:1904

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.1752402

出版商:AIP    

年代:1904

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.1752407

出版商:AIP    

年代:1904

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.1752408

出版商:AIP    

年代:1904

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.1752410

出版商:AIP    

年代:1904

数据来源: AIP

摘要:

Classroom demonstrations of the weird behavior of helium‐4 have roused many physics students out of their early morning stupor. When cooled below 2.18 K, liquid4Heenters a zero‐viscosity, superfluid phase and can creep up and out of its container or shoot up like a fountain. Now,4Heappears to have at least one more trick in its bag: It exhibits superfluid‐like properties even when compressed into its solid phase, according to an experiment done by Eun‐Seong Kim and Moses Chan at Pennsylvania State University.

ISSN:0031-9228    

DOI:10.1063/1.1752411

出版商:AIP    

年代:1904

数据来源: AIP

摘要:

Somewhere off the chart of known nuclides lies the last redoubt of nuclear existence: the long‐sought island of stability. There, but for the stabilizing effect of filled shells of nucleons, a nucleus would be torn apart by the electrostatic force between protons.

ISSN:0031-9228    

DOI:10.1063/1.1752412

出版商:AIP    

年代:1904

数据来源: AIP

摘要:

At first glance, silicon makes lousy photonic devices. Although it transmits microwaves, it doesn't lase efficiently, nor do its optical properties change readily in response to an electric field. But Si has one big advantage. Thanks to the electronics industry's 50‐year investment in the material, devices made from Si are cheap, powerful, and versatile. If Si‐based devices could manipulate photons, computers could tap directly into the optical lines that carry gigabytes of data per second. You could download a full, high‐definition movie to your PC in seconds.

ISSN:0031-9228    

DOI:10.1063/1.1752413

出版商:AIP    

年代:1904

数据来源: AIP