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1.
The generator coordinate approximation theory isformally applied to H
3
+
. Asecular equation with an eigenvector ofthree dimensions and matrix elements ofsix dimensions results. Numerical solutions of this equation are thevibrational energy levels ofH
3
+
. 相似文献
2.
3.
K. Wotruba 《Czechoslovak Journal of Physics》1962,12(11):854-857
A new theory of rectangular coils without an iron core is described which amends the old one of Fabry and Bitter. It enables us to compute field intensities in coils having very small openings, which the old theory could not do.
, , , .相似文献
4.
I. L. Zhogin 《Russian Physics Journal》1991,34(2):105-110
Field equations for n-frames h
a
that are possible in the theory of absolute parallelism are considered. It is shown that in three cases the equations can, after the substitution h
a
=HpH
a
(H=det H
a
, p is an n-dependent constant), be written in a trilinear form that contains only the matrix H
a
and its derivatives and not H
a
. It is shown that the equations are still regular for degenerate but finite matrices H
a
if rank H
a
2.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 2, pp. 22–27, February, 1991. 相似文献
5.
Nuclear emulsions were used to study the energy spectrum and forward-backward asymmetry of neutrons from the Co59(p,n) reaction forE
p
6·5 MeV. It was found that the decay of the compound nucleus makes a maximum contribution of 50% to the reaction yield. Energies of some excited states of the Ni59 nucleus were also determined.
The authors would like to thank all those who helped in this work, particularly all members of the cyclotron group of the Nuclear Research Institute of the Czechoslovak Academy of Sciences, who so willingly helped with the irradiation, and H. Koutová from the Faculty of Technical and Nuclear Physics, who carefully measured the emulsions. Our thanks are also due to R. Krejová from the Faculty of Technical and Nuclear Physics for developing the emulsions and J. Kopecký from the Nuclear Research Institute for providing the cobalt target. 相似文献
Co59(p,n) E p 6,5 MeV
- Co59(p,n) E p 6,5 MeV. , 50%. , Ni59.
The authors would like to thank all those who helped in this work, particularly all members of the cyclotron group of the Nuclear Research Institute of the Czechoslovak Academy of Sciences, who so willingly helped with the irradiation, and H. Koutová from the Faculty of Technical and Nuclear Physics, who carefully measured the emulsions. Our thanks are also due to R. Krejová from the Faculty of Technical and Nuclear Physics for developing the emulsions and J. Kopecký from the Nuclear Research Institute for providing the cobalt target. 相似文献
6.
The changes in domain structure as a function of the thickness of the crystal are studied on artificial magnetoplumbite crystals. The thickness dependence of the width of the domains is also studied; up to thicknesses of about 10 it follows the theoretical halfpower law. Above 10 the exponent is 0·633. The energy density of the Bloch walls=4·82 erg cm–2 and the exchange constantA=0·66×10–6 erg cm–1 are calculated on the basis of the above measurements.
We thank Z. Málek and V. Janovec for discussions and some remarks. 相似文献
. , 10 . 0,633. = =4,82 erg m–2 =0,66.10–6 erg cm–2.
We thank Z. Málek and V. Janovec for discussions and some remarks. 相似文献
7.
Coherent vacuum ultraviolet (VUV) radiation was generated by four-wave difference frequency mixing (VUV=21–2) of pulsed dye laser radiation in carbon monoxide (CO). The frequency 1 was tuned to the C
1+(=0)X
1+(=0) two-photon transition, while the dye laser frequency 2 was scaned around 17650 cm–1 which corresponds to the A
1(=7)«C
1+(=0) transition energy. The VUV intensity was found to be strongly wavelength dependent. The analysis of the spectrum revealed (i) that the VUV intensity was enhanced by the rotational levels of the A
1(=7) state and (ii) that the off-resonance excitation in the C
1+(=0)X
1+(=0) two-photon transition greatly contributed to the present four-wave mixing process. The effects of pumping laser detuning, saturation and foreign gases are briefly discussed. 相似文献
8.
K. Pátek 《Czechoslovak Journal of Physics》1959,9(2):161-167
The influence of weak ultra-violet irradiation on the brightness waves of electroluminescence is investigated for two types of ZnS-Cuphosphors. The observed effects (increase in brightness in the primary peak and its phase shift, the disappearance of the secondary peak) are explained on the basis of present-day conceptions on electroluminescence.
ZnS-Cu
ZnS-Cu. ( , ) .相似文献
9.
Miklós Rédei 《International Journal of Theoretical Physics》1995,34(8):1711-1718
Three definitions of logical independence of two von Neumann latticesP1,P2 of two sub-von Neumann algebras 1, 2 of a von Neumann algebra are given and the relations of the definitions clarified. It is shown that under weak assumptions the following notion, called logical independence is the strongest:A B 0 for any 0 A
P1, 0 B P2. Propositions relating logical independence ofP1,P2 toC
*-independence,W
* independence, and strict locality of 1, 2 are presented. 相似文献
10.
K. Pátek 《Czechoslovak Journal of Physics》1960,10(9):679-683
The influence of a small electric perturbation of variable phase on the brightness wave of alternating electroluminescence of ZnS-Cu is investigated. The results are compared with the model described in [1]. The increase in the number of ionized activators after switching on the electric field is studied and is found to reach equilibrium. after about 50 to 150 sec.
In conclusion the author thanks M. Mokonová for cooperation in evaluating the results of measurement. 相似文献
ZnS-Cu
ZnS-Cu. , [1]. , 50–150 s.
In conclusion the author thanks M. Mokonová for cooperation in evaluating the results of measurement. 相似文献
11.
Let S() be the S-matrix at energy for an abstract scattering system. We derive a bound, in terms of the interaction, on integrals of the form h () S()-
HS
2
d, where denotes the Hilbert-Schmidt norm.Supported by the Swiss National Science Foundation. 相似文献
12.
13.
Let be an orthomodular lattice and a strongly ordering set of probability measures on such that supports of measures exist in . Then we show the existence of a set of mappings of into that are physically interpretable as ideal, first-kind measurements. 相似文献
14.
J.K. Baria 《Czechoslovak Journal of Physics》2002,52(8):969-989
A model pseudopotential depending on an effective core radius but otherwise parameter free is proposed to study the equation of state by incorporating the s-d hybridization effects. Very recently proposed screening function due to Sarkar et al has been used to obtain the screened form factor. The equations of state for Cu, Ta, Mo, W and Pt have been studied up to the pressure of 1000 GPa. The vibrational properties such as phonon dispersion curves (in q and r space), phonon density of states, mode Grüneisen parameters, maximum frequency max, mean frequency , 21/2 = (/ -1)1/2 and fundamental frequency 2 and static properties such as dynamical elastic constants of rhodium and iridium are also calculated. The theoretical results are compared with experimental findings wherever possible. A good agreement between theoretical investigations and experimental findings has confirmed our formulation. 相似文献
15.
Leo Stodolsky 《General Relativity and Gravitation》1979,11(6):391-405
We consider the problem of finding the quantum mechanical phase associated with the propagation of a particle in a given external gravitational field, and conclude that it ism ds. In weak fieldsh
this allows us to calculate the gravitationally induced phase on a freely traveling particle as 1/2 h
P
dx
whereP
is the ordinary momentum. This formula has the expected Newtonian limit and is then used to calculate effects in matter wave interferometry such as those due to gravity waves and the dragging of the ether frame by rotating bodies. Light wave interferometry is then considered and is shown to be also described by 1/2 h
K
dx
, whereK
is the wave vector of the light, and the integral is along the path of the ray. Matter and light wave interferometry are compared in various cases.A preliminary version of this work was presented at the Grenoble Workshop on Neutron Interferometry, June 1978. 相似文献
16.
A. Z. Dubničková 《Czechoslovak Journal of Physics》1976,26(4):440-444
The spontaneous breakdown of symmetry of the-model in the [1, 1] representation of SU(2) SU(2) group is investigated. It is shown that the spontaneous breakdown is realized in all cases of squared mass
2 in mass term in the Lagrangian (
2>0,
2=0,
2<0), unlike the-model in [1/2, 1/2] representation, in which the spontaneous breakdown only for the case
2<0 manifests itself. Further, different but equivalent methods of obtaining the nonlinear realization for pions in the frame of an extended in such a way-model are demonstrated. Finally, it is sketched, that the obtained results can be generalized to all [N/2,N/2] representations of SU(2) SU(2) chiral group.Presented at the Symposium on Hadron-Hadron Scattering at High Energies, Liblice, Czechoslovakia, June 16–21, 1975.On leave of absence from theDept. of Theoretical Physics, Comenius University, Bratislava, Czechoslovakia. 相似文献
17.
J. Teichman 《Czechoslovak Journal of Physics》1960,10(2):144-157
, . . . , , . , . , . .
Betatron oscillations in an accelerator with a general field I
The paper gives a linear theory of equilibrium trajectories in an accelerator with a generalized magnetostatic field, the components of which are defined on a general rotation surface. Equations of motion of the particles in natural coordinates are derived with respect to the change in energy and dissipative force. A system of equilibrium trajectories is found in the general form. Conditions for the field components on the reference surface, necessary for the existence of equilibrium trajectories, for the conservation of their geometric similarities and for maintaining the constancy of the frequencies of the betatron oscillations, are derived. A condition is also derived which must be satisfied by the reference surface in order to conserve constant circular frequency of the particles. It is seen that it is not possible to find a field for an accelerator with an exactly constant circular frequency and with constant frequencies of the betatron oscillation in the relativistic energy region. An ultra-relativistic cyclotron with such properties is realizable.相似文献
18.
Hans-Werner Wiesbrock 《Letters in Mathematical Physics》1993,28(2):107-114
LetN, be a von Neumann algebras on a Hilbert space , a common cyclic and separating vector. Assume to be cyclic and also separating forN . Denote by ,
N
,
N the modular operators to (, ), (N, ), resp (N , ). Assume now
-it
N
it
N for allt 0. (Such type of inclusions ((N U, ) , ) are called half-sided modular.) Then the modular groups
it
,
N
ir
,
N
is
,t, r, s generate a unitary representation of the group S1(2, )/Z
2 of positive energy.Another result is related to two half-sided modular inclusions (1 , ) and (2 , ). Under proper conditions the three modular groups
it
,
1
ir
,
2
is
,t, r, s generate the three-dimensional subgroup of O(2, 1) of two commuting translations and the Lorentz transformation.Partly supported by the DFG, SFB 288 Differentialgeometrie und Quantenphysik. 相似文献
19.
20.
Granville A. Perkins 《Foundations of Physics》1978,8(3-4):177-189
A null 4-vector °, based on Dirac's relativistic electron equation, is shown explicitly for a plane wave and various Coulomb states. This 4-vector constitutes a mechanical model for the electron in those states, and expresses the important spinor quantities represented conventionally byn, f, g, m, j, ,1, ands. The model for a plane wave agrees precisely with the relation between velocity and phase gradient customarily used in quantum theory, but the models for Coulomb states contradict that relation. 相似文献