Some properties of a glow discharge tube in a magnetic field as a detector of electromagnetic radiation at millimetre wavelengths were investigated. The dependence of the detected voltage on the magnetic field in the vicinity of the cyclotron resonance was found to be of Lorentzian shape. This shape is also derived theoretically from a suggested model for the electrons in a glow discharge. The detected voltage, noise level, and noise equivalent power (NEP) were measured as a function of discharge current at cyclotron resonance conditions. Up to a discharge current of 600 mu A the noise level was constant and equal to the noise level at zero magnetic field. The detected voltage and NEP had a broad maximum around 400-500 mu A. The flow discharge tube operating at cyclotron resonance conditions was found to be better than the conventional crystal detector (1N53D) with respect to NEP and modulation frequency response.

It is shown that, similarly to general relativity, the bimetric theory of gravitation predicts the formation of primordial minicompact objects. Contrary to general relativity, however, it predicts that such objects are stable. Observational consequences are discussed.

The magnetic monopole recently observed by Price et al. is suggested to originate from a collision of a "magnetic atom" (consisting of a bound pair of oppositely charged magnetic monopoles) with a nucleus in the atmosphere. One of the component magnetic monopoles is suggested to have a mass of the 't Hooft type (\ensuremath{\sim}7000 GeV), and the other of the Schwinger type (several GeV). This scenario overcomes the two serious objections to the interpretation of Price's observation of a magnetic monopole (a) the kinematical lower limit to the monopole's velocity, which is much larger than that observed, and (b) the upper limit on the flux of monopoles, which is much lower than that observed by Price et al.

The sensitivity of a miniature glow discharge tube to electromagnetic millimeter-wave radiation (70 GHz) was investigated in magnetic fields near the cyclotron resonance. A 100-fold increase in the signal-to-noise ratio (SNR) was obtained at the cyclotron resonance. The SNR of the tube at cyclotron resonance was greater than ten times that of a commonly used crystal detector for millimeter-wave radiation (1N53D) measured under similar conditions.

A model is suggested which explains the discovery of fractional electric charges, in spite of the former failures to find quarks and quark-confinement theories; the model does not need many new assumptions about the fractionally charged particles. According to this model, the fractionally charged particles came from the decomposition of naturally occurring bound pairs of oppositely charged magnetic monopoles. Such bound pairs were suggested by the authors in a recent article in this journal to explain other phenomena.

The method of double Compton scattering for obtaining the electron spin-dependent momentum distribution is analyzed. It is shown that the effect, although small, is sufficiently large to be measured by present Compton-scattering experiments.

view Abstract Citations (1) References (28) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A correlation test of the intrinsic interpretation of QSO absorption redshifts. Opher, R. Abstract It is noted that the general intrinsic interpretation of QSO absorption redshifts predicts a high probability of clustering for the expulsion velocities of clouds ejected from a QSO core and that a correlation function has been defined which depends on the probability of clustering of three or more expulsion velocities. A test of this correlation is formulated which utilizes data on pairs of QSOs with similar emission redshifts and at least three well established absorption redshifts with corresponding expulsion velocities greater than 0.02c. It is shown that the correlation should be positive (maximum value +100%) if the absorption systems are intrinsic and correlated, zero if there is no physical connection among these systems, and negative if a strong anticorrelation exists or QSOs tend to eject one or two clouds at well separated characteristic velocities. Data on five QSOs are analyzed, and large positive values are obtained for the correlations. Publication: The Astrophysical Journal Pub Date: September 1975 DOI: 10.1086/153810 Bibcode: 1975ApJ...200..450O Keywords: Absorption Spectra; Correlation; Quasars; Red Shift; Stellar Radiation; Astronomical Models; Cosmology; Data Correlation; Spectral Correlation; Stellar Mass Ejection; Stellar Spectra; Astrophysics full text sources ADS | data products NED (5)

The x-ray structure amplitudes in LiH are calculated from tight-binding Bloch functions using the first-order density-matrix formalism of L\"owdin, a technique employed previously in calculations of the Compton profile of LiH. The Kunz localized atomic orbitals, which take into account overlaps to first order, are used in the calculations. The symmetric orthonormalization procedure of L\"owdin is used to construct atomic orbitals which are orthonormalized over the entire crystal and in which the overlaps of the Kunz wave functions are included exactly. The present calculations are in much better agreement with experiment than (i) previous calculations which used the Kunz wave functions but neglected the overlaps, (ii) the overlap treatment of Waller et al., which used simple screened-hydrogenic wave functions. In the present formalism, reflection planes which have different hkl indices but the same value of $\frac{(sin\ensuremath{\theta})}{\ensuremath{\lambda}}$ have different structure factors, as is indeed observed experimentally.