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Some Aspects of Vacuum Ultraviolet Radiation Physics presents some data on the state of research in vacuum ultraviolet radiation in association with areas of physics. Organized into four parts, this book begins by elucidating the optical properties of solids in the vacuum ultraviolet region (v.u.v.), particularly the specific methods of determination of optical constants in v.u.v., the properties of metals, and those of ionic insulators. Part II deals with molecular spectroscopy, with emphasis on the spectra of diatomic and simple polyatomic molecules, paraffins, and condensed phases. Part III focuses on some aspects of emission spectroscopy in the v.u.v. in relation to laboratory plasmas. The last part describes the image formation by concave gratings, spectrophotometry, and diffusion by surfaces. This book will be very valuable to physicist and graduate students inclined to this field of interest.
The absorption spectrum of the H2 molecule has been studied in the wavelength region 930-840 A with a 6.8-m grazing incidence vacuum spectrograph in combination with the helium continuum. The Lyman and the Werner bands have been extended to their dissociation limits. The results of the rotational analysis of these bands are given. (Author).
Phycoerythrin, pigment-protein complex in photosynthetic organisms, plays a role in photosynthesis in transferring an energy abosrbed by itself to chlorophyll. Previous studies in this laboratory showed that the longest absorption band at 565 millimicrons responsible for fluorescence originates from the interaction between the pigment and SH-group of the protein in phycoerythrin. During the course of investigation on the effect of SH-blocking agent on energy transfer, it was found that modified phycoerythrin is released from cells treated with PCMB. This modified phycoerythrin possesses a single absorption band at 545 millimicrons, while native phycoerythrin shows three absorption bands at 500, 545, and 565 millimicrons. In the glutathione-treated modified phycoerythrin, the highly fluorescent 565 millimicrons chromophore was partially regenerated. This investigation indicates that native phycoerythrin is composed of two units and that modified phycoerythrin is one of them separated from the other containing the 500 millimicrons chromophore only. (Author).
The mapping of extended, cultural ground targets by an airborne radar is examined using communication theory concepts including those of the antenna transfer function and the target spatial frequency spectrum. Use of the set of transfer functions that correspond to Taylor aperture distributions and specification of the targets directly in terms of their spatial frequency spectra, permits one to examine the antenna images for quality and resolution. The results obtained indicate that resolution for a class of ground targets can be much better than is predicted by the two-point Rayleigh resolution criterion. It is also true that there can be situations in which the shape of the antenna images are quite independent of the radiation pattern. Several types of spatial noise were also included in the input spectrum to investigate noise effects on image quality and resolution. (Author).
A nearly vertical antenna wire varying in length from 3000 to 8000 ft was shock-excited by a high-voltage source. The resulting radiation fields were received at distances of about 600 km by two stations separated laterally so as to subtend an angle of about 15© at the source. The difference in wavefront arrival times at the two stations, observed for 101 transmissions, showed an average absolute deviation from the mean of about only 1/2 [mu]s. This figure includes the effects of possible source asymmetries, sferics noise, instrumental errors, and wave propagation. Typical oscillograms of antenna currents and radiation fields are given. It is shown that the amplitudes and durations of the pulse envelopes, the amplitudes and durations of the first half-cycles, and the quasi-frequencies of the pulses are in good agreement with a theory that takes energy losses into account.
A method for online assembly-language debugging which greatly simplifies several of the bookkeeping tasks characteristically associated with that process has been developed and implemented in a program for the UNIVAC M-460 computer at Air Force Cambridge Research Laboratories. With this program, an online user may insert or delete (in symbolic assembly language) any number of lines at any point in his previously assembled program in core, with the remainder of the program being relocated appropriately.