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1.
Spectrum of the Micromaser with Kerr Medium 总被引:3,自引:0,他引:3
WUShu-Dong 《理论物理通讯》2002,37(5):637-640
We have established the master equation for the micromaser with Kerr medium field density operator,studied the spectrum of the micromaser with Kerr medium and analyzed the influence of Kerr effect and the detuning on the spectrum.In the thermal-atom regime,we find that Kerr effect broadens Linewidth D and increases frequency-shift S,and that the detuning Δ narrows linewidth D and increases frequency-shift S as a whole,Moreover Kerr effect leads to oscillatings more rapidly in the resonance peaks,which means that it causes quantum noise,As a whole,with the increase of cavity-length L,the linewidth D and frequency-shift S gradually increase. 相似文献
2.
The analytical solution of the Ornstein–Zernike equation with one Yukawa closure of the factorizable-coefficient case is extended from the scalar-factorization case to the vector-factorization case. As a result, the scaling parameter is extended from a scalar quantity to a matrix quantity, and the scaling matrix
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A knowledge of the potential energy of a point charge outside a planar surface is important for understanding many charge transfer processes and surface spectroscopies. Whilst the ‘theory of images’ of classical electrostatics can be used to derive this potential, the result is valid only for static charges far from the surface. In this paper we describe recent attempts to consider moving charges near real surfaces, with particular reference to surfaces with dielectric overlayers, and we review experimental studies of the effects of the image force. 相似文献
5.
Arnold R Augier C Baker J Barabash AS Basharina-Freshville A Blondel S Bongrand M Broudin-Bay G Brudanin V Caffrey AJ Chapon A Chauveau E Durand D Egorov V Flack R Garrido X Grozier J Guillon B Hubert P Hugon C Jackson CM Jullian S Kauer M Klimenko A Kochetov O Konovalov SI Kovalenko V Lalanne D Lamhamdi T Lang K Liptak Z Lutter G Mamedov F Marquet Ch Martin-Albo J Mauger F Mott J Nachab A Nemchenok I Nguyen CH Nova F Novella P Ohsumi H Pahlka RB Perrot F Piquemal F Reyss JL Richards B Ricol JS 《Physical review letters》2011,107(6):062504
We report results from the NEMO-3 experiment based on an exposure of 1275 days with 661 g of (130)Te in the form of enriched and natural tellurium foils. The ββ decay rate of (130)Te is found to be greater than zero with a significance of 7.7 standard deviations and the half-life is measured to be T(?)(2ν) = [7.0 ± 0.9(stat) ± 1.1(syst)] × 10(20) yr. This represents the most precise measurement of this half-life yet published and the first real-time observation of this decay. 相似文献
6.
PropertiesofNd:YAGLaserwiththeNonlinearAbsorptionoftheIntracavityFullerenes¥LUOTing;YUZhenxin(StateKeyLabiratoryofUltrafastLa... 相似文献
7.
The effect of the irradiation of germanium with α-particles on the recombination of current carriers
Gerhard Dorda 《Czechoslovak Journal of Physics》1958,8(2):181-185
A study was made of the effect of irradiation with -particles on surface recombination on germanium. An approximative evaluation of the results showed that the position of the energy level of the recombination centre produced by irradiation lies near to the upper edge of the valence band or the lower edge of the conduction band. A value of roughly 3. 10–12 cm2 was obtained for the effective recombination surface produced by the absorption of one -particle. 相似文献
8.
The Langevin equation is used to simulate the fission process of ^112Sn ^112Sn and ^116Sn ^116Sn. The mass distribution of the fission fragments are given by assuming the process of symmetric fission or asymmetric fission with the Gaussian probability sampling. The isoscaling behaviour has been observed from the analysis of fission fragments of both the reactions, and the isoscaling parameter α seems to be sensitive to the width of fission probability and the beam energy. 相似文献
9.
Dyson’s Constants in the Asymptotics of the Determinants of Wiener-Hopf-Hankel Operators with the Sine Kernel 总被引:1,自引:1,他引:0
Torsten Ehrhardt 《Communications in Mathematical Physics》2007,272(3):683-698
Let stand for the integral operators with the sine kernels acting on L
2[0,α]. Dyson conjectured that the asymptotics of the Fredholm determinants of are given by
as α→∞. In this paper we are going to give a proof of these two asymptotic formulas. 相似文献
10.
The ionization process in the collisions of He^2+ with C^q+ (q = 0-5) is investigated by using the continuum-distorted-wave eikonal-initial-state approximation. Double-differential cross sections for 1s and 2s sub-shells are obtained at the electron-ejected angle θ = 0° with the projectile energy ranging from 30keV/u to 10MeV/u. Variation of ionization mechanisms with q in C^q+ is studied, and the dependences on the projectile energies and target sub-shells are also discussed. It is found that in the whole energy range, the absolute values of soft collision (SC) and binary encounter (BE) peaks decrease with increasing q. For the lower incident energies, the electron capture to the projectile continuum (ECC) peak decrease with increasing q as well as SC and BE peaks. For the higher incident energies (〉 1 MeV/u), the absolute value of ECC peak increases with increasing q, so that the crossings of cross sections appear for C^q+ with different q. This can be explained by the matching of velocities between the projectile and the electron initially bound to the target. 相似文献
11.
In the course of this work, the possibility of the measurement of ambient dose equivalent H*(10) with the BeOSL dosimetry system was evaluated. Calculations for the energy response of the 2-element BeOSL dosimeter for irradiation with H*(10) were performed. The response doesn't fulfil the requirements of IEC 62387-1. Especially the response for photon energies of 60–100 keV is to low. It is possible to correct this under response using a modified BeOSL 2-element dosimeter and a linear algorithm. So the national requirements for a H*(10) dosimeter in Germany can be fulfilled. An incidence angle independent measurement is not possible because for several angles of incidences (>60°) the filters of the 2-element dosimeter doesn't shield the correct element. Another material which is more suitable for the H*(10) measurement was tested. So the doping of BeO with Lanthanum leads to an enhanced energy response for measurement of H*(10). Furthermore a higher OSL sensitivity was found for this material. Further tests on the influence of Lanthanum concentration on the dosimetric properties are necessary. 相似文献
12.
The Optical Characteristics of the Acousto-optic Tunable Filter with the Equivalent Point 总被引:2,自引:0,他引:2
In this paper, the interaction curves of acoustic and optical waves in a non-collinear AOTF (acousto-optic tunable filter) cell under the parallel-tangent momentum matching condition are analyzed systematically. A new theory of equivalent point for AOTF design is put forward. The wavelength characteristics and the wavelength resolution of two diffraction beams with equivalent point design in AOTF are emphatically analyzed. The optical characteristics at δ = 0 (ideal case) and δ≠0 (real case) are also discussed. The advantages of the AOTF with equivalent point design include high wavelength resolution, more quantitative energy and larger incident angle aperture. 相似文献
13.
Satoshi Ikeda 《Foundations of Physics》1980,10(3-4):281-287
The concept of nonlocalization associated with the gravitational field, which is carried by the internal variable () annexed to each point, is considered in connection with the geometrical theory of gauge fields. Two concrete examples of nonlocalization are proposed by taking as a vector and a spinor, respectively. 相似文献
14.
The reactions of π-electron acceptors such as 1-chloro-2,4,6-trinitrobenzene (picryl chloride), 7,7′,8,8′-tetracyanoquino-dimethane (TCNQ), tetrachloro-p-benzoquinone (chloranil) and tetra-cyanoethylene (TCNE) with the cyclic polyamine base 1,4,8,11-tetraazacyclotetradecane (TACTD) have been investigated in CHCl3 solvent. The data indicate the formation of the CT-complexes with the general formula [(TACTD) (acceptor)2]. The 1: 2 stoichiometry of the (TACTD)-acceptor was based on elemental analysis and infrared spectra of the solid CT-complexes along with the photometric titration curves for the reactions in CHCl3. The formation constants (K) for the CT-complexes are shown to be strongly dependent on the type and structure of the acceptor. 相似文献
15.
Entanglement Capacity of Two-Qubit Unitary Operator with the Help of Auxiliary System 总被引:3,自引:0,他引:3
HU Bao-Lin DI Yao-Min 《理论物理通讯》2007,47(6):1029-1032
The'entanglement capacity of general two-qubit unitary operators is studied when auxiliary systems are allowed, and the analytical results based on linear entropy when input states are disentangled are given. From the results the condition for perfect entangler, α1 = α2 = π/4, is obtained. Contrary to the case without auxiliary system, the parameter α3 may play active role to the entanglement capacity when auxiliary systems are allowed. 相似文献
16.
A general frequency-dependent dispersion relation of the speed of light in different mediums (vacuum, insulator, plasma) is deduced based on the Proca equations. Several recent astronomical observations of the pulsars are used to set the limits on the photon rest mass by this method and several upper bounds of larger than one order improvement than previous similar results are obtained. Considering the dispersion of the massive photon, the possible upper limits on the photon rest mass are also derived from the recently experimental results for testing the constancy of the speed of light in special relativity. 相似文献
17.
Examples are given which prove the ICARUS detector quality through relevant physics measurements. We study the decay energy spectrum from a sample of stopping events acquired during the test run of the ICARUS T600 detector. This detector allows the spatial reconstruction of the events with fine granularity, hence, the precise measurement of the range and dE/dx of the with high sampling rate. This information is used to compute the calibration factors needed for the full calorimetric reconstruction of the events. The Michel
parameter is then measured by comparison of the experimental and Monte Carlo simulated decay spectra, obtaining
. The energy resolution for electrons below
MeV is finally extracted from the simulated sample, obtaining
.Received: 20 November 2003, Published online: 4 February 2004 相似文献
18.
Svetlana B. Meshkova 《Journal of fluorescence》2000,10(4):333-337
The influence of -diketone forms on the luminescence intensity of lanthanide compounds in a series of ligands, acetylacetone (trifluoroacetylacetone, benzoylacetone)—their unsaturated analogues (monomeric form)—copolymers of the latter with styrene (methylmethacrylate), was studied. Lanthanides in compounds with copolymers have been established to demonstrate the brightest luminescence. It was found that its intensity depends not only on the character of the substituent (CH3, CF3, C6H5) in the -diketone molecule, but also on the distance between the -diketone fragments in the copolymer. Reasons explaining the high intensity of luminescence in lanthanide–copolymer compounds are considered. 相似文献
19.
The spin is an important property of a particle. Although it is unlikely, there is still a possibility that two particles with di erent spins share similar masses. In this paper, we propose a method to probe this kind of mass degeneracy of particles with di erent spins. We use the cascade decay B+→X(3872)K+, X(3872)→D+D- to illustrate our method. It can be seen that the possible mass degeneracy of X(3872) can lead to interesting behavior in the corresponding cascade decay. 相似文献
20.
K. Daum W. Rhode P. Bareyre R. Barloutaud G. Chardin B. Degrange J. Ernwein B. Kuznik H. Meyer L. Mosca L. Moscoso O. Perdereau M. Schubnell S. Tisserant Y. Wei 《Zeitschrift fur Physik C Particles and Fields》1995,66(3):417-428
The combined analysis of the final event set of data on neutrino interactions inside the detector, upward going stopping muons and horizontal muons recorded in the Fréjus experiment is presented. The absolute atmospheric neutrino spectra in the energy range
for electron neutrinos and
for muon neutrinos are determined. Based on the parameterization of Volkova for thev
µ
a spectral index of =2.66±0.05 is obtained from the ratio of horizontal muons over upward going stopping muons and from the measurement of the energy loss of horizontal muons inside the detector. The neutrino spectra are compared with various flux calculations. They do not show any evidence for neutrino oscillations in agreement with earlier analyses of the Fréjus data.Now atUniversity of Michigan, Ann Arbor, USA 相似文献