The Institute of Physics ( IOP ) по журналам "Journal of Physics A: General Physics"
Отображаемые элементы 2140 из 644

(19680501)An optical linewidth of 20 Hz of laser light scattered by spherical particles undergoing Brownian motion has been measured experimentally by photoncounting statistics using the theory of the intensityfluctuation distribution ...

(19720101)Measurements of the width of a Lorentz spectral line using a digital photoelectron correlation device are compared with measurements made on the same gaussian light source by a pulse separation detector. The agreement of ...

(19721101)The authors propose an alternative scheme for the clipped light intensity correlation measurement which is complementary to the usual scheme as proposed by Jakeman and Pike (1969). The new scheme gives essentially the same ...

(19720101)A method is given for resolving the quantum equations of the spinlattice relaxation for a system of electronic spins. It is shown how the relaxation times may be deduced, for example, from the maxima which occur in the ...

(19700701)The steadystate structure of an ionizing current layer ('sheet') propaging into a cold unionized gas is examined using a collisionfree selfconsistent field approach. The results parallel those for a collisiondominated ...

(19710501)The problem of alpha decay of deformed even nuclei is treated by assuming the barrier to be the usual anisotropic electrostatic potential superimposed by a nonlocal alpha nuclear potential. With certain assumptions a ...

(19710701)For pt. II see abstr. A35654 of 1971. A theory is developed to account for the intensity of ASE as a function of the length and diameter of the amplifying medium and of its inversion density. Detailed results are presented ...

(19710501)A simple relationship is derived between Lc the critical length for amplified spontaneous emission, and LT, the threshold length of gas that must be excited for laser action to occur in a cavity of loss delta l. The ...

(19710301)The threshold condition for the onset of amplified spontaneous emission is derived and experimentally verified in the 3.39 mu m HeNe and the 0.614 mu m Ne systems. A short discussion is given concerning the confusion ...

(19720401)For pt. III see abstr. A54492 of 1971. The origins of beam divergence in amplified spontaneous emission are discussed and theoretical models are developed to predict what their effect would be in real systems. The divergence ...

(19680101)In this paper the authors have given a quantitative analytical investigation of the interesting concept of the modulation of an electromagnetic wave by its propagation along an alternating magnetic field in a semiconductor ...

(19721001)The analogues of the 52V levels at 0.793 and 0.846 MeV have been examined as resonances in the 51V (p, gamma )52Cr reaction at proton energies of 1.567 and 1.629 MeV. The resonance at 1.567 MeV and hence the 0.793 MeV 52V ...

(19711101)Using a pure configuration shell model, differential and total cross sections have been evaluated for the photoproduction of positive pions from 16O leading to giant resonance states of various multipolarities in 16N. The ...

(19720201)The analytic continuation of 2F1(a,b;1;z) into the region mod z mod >1 is derived by using a complex single loop Euler transform instead of the usual MellinBarnes transform This facilitates a general application of ...

(19720701)The problem of finding and calculating numerically a conformal mapping which simultaneously uniformizes several branch points in energy of a partial wave scattering amplitude is studied. Arguing from a potential scattering ...

(19720101)The theory of functions of a complex variable is applied to show that the lattice Green function Gd(t;r) is an analytic function of the variable t, except when t is associated with a critical point. Here r denotes the ...

(19680101)The theoretical results derived in the previous paper by de Beer et al. in 1968 have been compared with experimental observations, with reference to the fluctuations in the total numbers of muons and electrons and to the ...

(19720501)The (1,0)(+)(0,1) massive spin one field phi mu nu (x) is quantized following the method of Takahashi and Umezawa (1953). The interaction Hamiltonian in the interaction picture is then calculated for such a field interacting ...

(19690301)In recent studies of the inverse diffraction problem, a solution was sought in the form of a linear integral transform. In this paper a formal solution is obtained in terms of a differential rather than an integral operator. ...

(19690301)The binding energy, the bare form factor and the photodisintegration, bremsstrahlungweighted and integrated cross sections of the trinucleons (3H and 3He) have been calculated earlier by using a modified Feshbach wave ...
Отображаемые элементы 2140 из 644