摘要:

This spectroscopic coincidence is considered from the viewpoint of experiments to measure tetrahedral parameters applicable to extensive calculations of atmospheric spectra. Theoretical results related to the polar character of the ground and excited vibrational states are discussed. Numerical values for ground‐state transition frequencies, and estimates for ground‐ and excited‐state Stark shifts, are given for theR(6) multiplet in 2&ngr;3of12CH4. Possible applications are mentioned for13CH4.

ISSN:0003-6951    

DOI:10.1063/1.1654994

出版商:AIP    

年代:1974

数据来源: AIP

摘要:

A controlled series of MOS transistors have been studied to determine the effects of low‐oxygen‐partial‐pressure atmospheres, resulting from high‐temperature anneals in CO&sngbnd;CO2gas mixtures, on the oxide charges and surface‐state densities of the silicon‐dioxide gates of MOS transistors, by measurements of threshold voltages and low‐frequency 1/fnoise. The results indicate that both the threshold voltage and the 1/fnoise increase as the result of the reducing treatment, with noise increasing by more than two orders of magnitude. Partial reoxidation of reduced SiO2decreased the threshold voltage, but did not decrease the noise level.

ISSN:0003-6951    

DOI:10.1063/1.1654995

出版商:AIP    

年代:1974

数据来源: AIP

摘要:

The nucleation field for rare‐earth‐Co5particles is shown to be directly related to variations in the domain wall energy associated with an oxide layer at the particle's surface. A physical model based on the experimental results for Nd1−xSmxCo5single crystals can quantitatively describe the magnetization reversal.

ISSN:0003-6951    

DOI:10.1063/1.1654997

出版商:AIP    

年代:1974

数据来源: AIP

摘要:

An abrupt hysteretic change in bubble size as a function of bias field has been observed in garnet films grown by chemical vapor deposition (CVD). Similar bistable bubbles and their associated transformations have now been observed in double‐layer films grown by liquid‐phase epitaxy (LPE). A slight compositional variation from layer to layer was introduced. Single‐layer LPE films similar to CVD films reported earlier did not display these bistable bubbles. Compositional variations are postulated as the cause of the bistable bubbles, rather than strain variation as previously suggested.

ISSN:0003-6951    

DOI:10.1063/1.1654998

出版商:AIP    

年代:1974

数据来源: AIP

摘要:

Current‐carrying capacities at 4.2 K of superconducting multifilamentary V3Ga cables have been measured in transverse magnetic fields up to 20.8 T. The performance of the cables does not appear to be affected by bending as long as bending diameters are greater than 20 mm.

ISSN:0003-6951    

DOI:10.1063/1.1654999

出版商:AIP    

年代:1974

数据来源: AIP

摘要:

It has been proposed that Permalloy (Ni0.8Fe0.2) can be used as thin‐film magnetic bubble generator and sensor, and Au is a proposed electrical connector for input/output. We find that significant interdiffusion occurs to levels of 1–10 at.% for the diffusion couples Ni/Au, Fe/Au, and Permalloy/Au. We have determined 350°C solubility levels for all pairs for 1100‐Å films for annealing times from 10 to 2400 min. There was no degradation of electrical or magnetic properties of the Permalloy/Au system even at the highest levels of interdiffusion, indicating that it is ideally suited for a magnetic bubble metallurgy.

ISSN:0003-6951    

DOI:10.1063/1.1655000

出版商:AIP    

年代:1974

数据来源: AIP

摘要:

This letter describes a new accelerating structure for a heavy‐particle linear accelerator: a quarter‐wavelength spiral loaded radio‐frequency resonator. Experiments and preliminary analysis of this structure indicate that its performance as an accelerating structure is considerably superior to the helically loaded resonator in such important areas as surface electric field level, mechanical stability, and shunt impedance. As a superconducting device, a superconductiong lead‐plated copper spiral resonator of phase velocity &bgr; = 0.045 has been run continuously at an accelerating field level of 1.46 MV/m with little degradation inQbelow the low‐field level. Measured properties of superconducting niobium imply that a niobium resonator of this type could reach accelerating fields in excess of 4 MV/m before reaching breakdown conditions.

ISSN:0003-6951    

DOI:10.1063/1.1655001

出版商:AIP    

年代:1974

数据来源: AIP

摘要:

Electron‐excited Auger electron spectroscopy normally relies on differentiation of the electron energy spectrum to enhance signal contrast. The contrast is increased, however, only at the expense of signal strength and the Auger structure itself is not recovered. Dynamic background subtraction, which involves multiple differentiation followed by integration of the same order, is shown to rectify these difficulties.

ISSN:0003-6951    

DOI:10.1063/1.1655002

出版商:AIP    

年代:1974

数据来源: AIP

ISSN:0003-6951    

DOI:10.1063/1.1655005

出版商:AIP    

年代:1974

数据来源: AIP