摘要:

The vacuum deposition of gold upon the color‐centered surface of NaCl produced by x‐ray irradiation is described. The increase of nucleation density and the enhancement of (100) parallel orientation are observed. It appeared that these findings in experimental results compared with the phenomena on the normal cleavage surface were attributable to the effects of point imperfections produced. A lowering of epitaxial temperature is also observed. The controlled production of imperfections on the surface by irradiation has a critical effect upon the nucleation and epitaxial growth.

ISSN:0003-6951    

DOI:10.1063/1.1652445

出版商:AIP    

年代:1968

数据来源: AIP

摘要:

The relationship between the spectrum of an ensemble saturated by coherent radiation and the forced transient response of that ensemble to the saturating field is derived. An experiment equivalent to the optical analog of the transient nutation effect is proposed.

ISSN:0003-6951    

DOI:10.1063/1.1652454

出版商:AIP    

年代:1968

数据来源: AIP

摘要:

A three‐dimensional microscopic sample is recorded holographically using a high numerical aperture but not necessarily perfect lens. The volume sample is reconstructed using the same lens and is viewed using an ordinary microscope. The technique claims a virtually aberration‐free reconstruction image of a volume much larger than that observable with a single positioning of a high magnification objective.

ISSN:0003-6951    

DOI:10.1063/1.1652455

出版商:AIP    

年代:1968

数据来源: AIP

摘要:

A magnetoelastic mode has been experimentally observed in an obliquely magnetized YIG rod under two port operation conditions.It is interpreted to be due to axially propagating waves relative to the lower branch of the magnon‐longitudinal phonon dispersion curve.

ISSN:0003-6951    

DOI:10.1063/1.1652456

出版商:AIP    

年代:1968

数据来源: AIP

摘要:

The detection and identification of a surface compound formation on a steel surface was made using a backscatter Mo¨ssbauer effect technique. The compound was identified as &bgr;‐FeOOH from Mo¨ssbauer effect parameters of iron oxide and oxy‐hydroxide compounds. An estimate of the compound thickness is given based on a calculation of the backscatter amplitude versus distance into the sample. This technique can be used to identify corrosion products on the surface of iron bearing materials.

ISSN:0003-6951    

DOI:10.1063/1.1652437

出版商:AIP    

年代:1968

数据来源: AIP

摘要:

The attenuation of elastic surface waves in crystalline quartz at frequencies of 316 MHz and 1047 MHz has been measured as a function of temperature between 4.2°K and 300°K. At temperatures below 30°K the absorption per cm was found to follow aT4law with an approximately linear frequency dependence. At the higher temperatures the absorption varied as &ohgr;2and was independent of temperature. The surface waves were detected by direct piezoelectric transduction and by a new optical method.

ISSN:0003-6951    

DOI:10.1063/1.1652438

出版商:AIP    

年代:1968

数据来源: AIP

摘要:

Although the microstructure of continuous SiC filaments can be controlled by regulating the deposition temperature, the relative concentrations of the reactant gases, and the number of plating chambers, additional microstructural features present in the filaments are due to inherent, localized thermal effects in the plating chambers.

ISSN:0003-6951    

DOI:10.1063/1.1652439

出版商:AIP    

年代:1968

数据来源: AIP

摘要:

Short pulses emitted by a Nd:glass laser were passed through LiNbO3crystals to produce SHG (second harmonic generation) of tunable duration. The duration of the SHG pulse was tuned between 1.5 psec and 9 psec by varying the length of the LiNbO3crystals.

ISSN:0003-6951    

DOI:10.1063/1.1652440

出版商:AIP    

年代:1968

数据来源: AIP

摘要:

An experiment is described in which a hologram is recorded by scanning the source and having the detector stationary. The resulting ``scanned source'' hologram is shown to be identical to the conventional ``scanned detector'' hologram. The significance of this experiment is that it demonstrates: (1) that sampled holograms of an object can be recorded at a single point in space with either a scanning source or an array of sources; (2) that the object wavefront need not actually exist in space but may be geometrically synthesized; (3) that the object may be illuminated by a changing rather than stationary wave field. The interesting possibilities which this configuration gives rise to are briefly discussed.

ISSN:0003-6951    

DOI:10.1063/1.1652441

出版商:AIP    

年代:1968

数据来源: AIP

摘要:

Measurements of the low temperature thermal conductivity of electron‐irradiated CdS were made on irradiation and annealing. The measurements show that primary defects move at temperatures as low as 35°K in CdS. After annealing above 60°K, an anisotropic thermal conductivity is developed which is attributed to the formation of anisotropic phonon scatterers. The preferred orientation of the anisotropic defects is along thecaxis, and the equilibrium energy difference for reorientation is ∼1.5 × 10−3eV.

ISSN:0003-6951    

DOI:10.1063/1.1652442

出版商:AIP    

年代:1968

数据来源: AIP