198 results about "Atomic nucleus" patented technology

The invention discloses a lithium ion battery silicon carbide composite anode material and a preparation method thereof and aims to solve the technical problem of improving the cycling stability of a silicon carbide cathode. The lithium ion battery silicon carbide composite anode material consists of the following components in percentage by mass: 85 to 75 percent of graphite and 15 to 25 percent of silica particles, wherein the nano silica particles are dispersed on a graphite carrier to form a nuclear shell structure and are 5 to 16 mum in granularity. The preparation method comprises the following steps of: preparing a graphite dispersing agent and a silicon grinding dispersing agent; adding the silicon grinding dispersing agent into the graphite dispersing agent; and performing thermal treatment. When the method is compared with the prior art, silicon atoms are dispersed on a graphite atomic nucleus by a cation-anion charge absorption method, so that the silicon atoms can uniformly wrap the surface of the graphite, the dispersity of silicon is effectively improved in a silicon carbide composite material preparing process, the initial efficiency and the cycling stability of the silicon carbide composite anode material are improved, and a battery using the material as an anode material has relatively high safety, multiplying power performance and cycle performance.

A nuclear magnetic resonance sensing apparatus and method for operating in an earth borehole comprises a source of switchable magnetic field to polarize nuclei in the region of interest, said source comprising a coil wound on a magnetic core having controllable residual magnetization. Maintaining the magnetization of the core during a polarization interval does not require steady current in the coil. Switching intensity and polarity of magnetization of the core causes precession of spin magnetic moments of the nuclei; the precession induces a signal indicative of nuclear magnetic resonance properties of earth formations.

A method for inducing nuclear fusion and a reactor for inducing nuclear fusion involve positioning a bubble containing fusionable nuclei at the center of a liquid filled spherical vessel and generating a spherically symmetric positive acoustic pulse in the liquid. The acoustic pulse surrounds and converges toward the center of the vessel to compress the bubble, thereby providing energy to and inducing nuclear fusion of the atomic nuclei.

The invention relates to a multi-parameter logging method while drilling based on a controllable neutron source, which includes the steps of utilizing a multi-detector measuring system consisting of the D-T controllable neutron source, two thermal neutrons and two gamma detectors, sufficiently utilizing fast neutrons transmitted by the controllable neutron source to militate with atomic nucleuses of formation elements by means of special pulse and measuring timing sequence design, recording gamma energy spectrums, gamma time spectrums and thermal neutron time spectrums at different positions, and performing simultaneous measurement of multiple parameters such as formation density, formation porosity, formation fluid saturation, formation element content and the like with a nuclear logging instrument in a drilling process by means of different spectral resolution and data processing, so that valuation on formation lithology, formation porosity and formation fluid saturation while drilling are realized, the same parameter of the formation porosity and the formation fluid saturation can be measured by various methods, logging interpretation ambiguity is decreased, and accuracy and reliability of logging data interpretation are enhanced.

In order to solve the high-speed cancer excited state problem, a biological retarder is needed. Cancer energy is converted into intramolecular transfer or other vibrational state transfer through collision. By means of the nucleus retarder principle, a neutron and a retarder atomic nucleus are subjected to collision so that the speed can be decreased, and the retarder which does not absorb neutrons and does not react with neutrons is selected. An important task of the cancer biology and even the natural science is that which material can bear a cancer nuclear fission biological retarder. According to repeated experiments, various safety factors are synthesized, and finally a biological moderator is correctly selected through a successful experiment. Bifidobacterium is free of toxicity and harm to a body, and the biological retarder can be ideal for treating a cancer. In the future, more microorganism retarders will be produced, the biological retarder is used for decelerating tumors, a proper amount of deceleration molecular nuclear energy can be used as senile cell addition nuclear energy, and the biological retarder gives power to biological science and will play an indispensable critical role.

Field Image Tomography (FIT) is a fundamental new theory for determining the three-dimensional (3D) spatial density distribution of field emitting sources. The field can be the intensity of any type of field including (i) Radio Frequency (RF) waves in Magnetic Resonance Imaging (MRI), (ii) Gamma radiation in SPECT/PET, and (iii) gravitational field of earth, moon, etc. FIT exploits the property that field intensity decreases with increasing radial distance from the field source and the field intensity distribution measured in an extended 3D volume space can be used to determine the 3D spatial density distribution of the emitting source elements. A method and apparatus are disclosed for MRI of target objects based on FIT. Spinning atomic nuclei of a target object in a magnetic field are excited by beaming a suitable Radio Frequency (RF) pulse. These excited nuclei emit RF radiation while returning to their normal state. The intensity or amplitude distribution of the RF emission field g is measured in a 3D volume space that may extend substantially along the radial direction around the emission source. g is related to the 3D tomography f through a system matrix H that depends on the MRI apparatus, and noise n through the vector equation g=Hf+n. This equation is solved to obtain the tomographic image f of the target object by a method that reduces the effect of noise.

A vessel for rare-gas filling is provided, where almost complete light circular polarization is realized, which has a light incident window of a single crystal material whose thickness and crystal axis orientation are optimized, and a polarization method of rare gas nuclei in the vessel is also provided. In addition, embodiments of the vessel is provided, which is impervious to alkali metal, and sustains high pressure, and shows no permeability for ³He gas, and has negligibly small neutron absorption so as to be suitable for application to basic science, for example, neutron scattering, and the polarization method in the vessel is also provided.

The vessel for rare-gas filling of the present invention comprises a vessel body 3, and a pipe 4, which is connected to the vessel body 3 and introduces a rare-gas containing gas and an alkali metal into the vessel body 3. A light incident window 2 made of a single-crystal material, which has proper thickness and proper crystal axis orientation, is attached to the vessel body 3. The vessel for rare-gas filling is preferably made of sapphire or the like.

A method and apparatus for imaging within a sample space an object containing quadrupolar nuclei comprises irradiating the object to excite nuclear quadrupole resonance, applying to the object a magnetic field gradient having a profile Bo(x) such that the square of the profile (Bo(x))2 varies linearly with distance (x), detecting resonance response signals from the nuclei, and deriving an image from the response signals. A method of and apparatus for nuclear quadrupole resonance testing an object, and a method of and apparatus for detecting the presence of a particular substance containing a given species of quadrupolar nucleus, are also disclosed.

A practical technique for inducing and controlling the fusion of nuclei within a solid lattice. A reactor includes a loading source to provide the light nuclei which are to be fused, a lattice which can absorb the light nuclei, a source of phonon energy, and a control mechanism to start and stop stimulation of phonon energy and/or the loading of reactants. The lattice transmits phonon energy sufficient to affect electron-nucleus collapse. By controlling the stimulation of phonon energy and controlling the loading of light nuclei into the lattice, energy released by the fusion reactions is allowed to dissipate before it builds to the point that it causes destruction of the reaction lattice.

A top layer of a predetermined metal is provided on a mirror for use in a lithographic apparatus having source to provide radiation of a desired wavelength. The source generates a stream of undesired metal particles that are deposited to form smaller and larger nuclei on the mirror. The top layer may interdiffuse in a predetermined temperature range with nuclei of the metal deposition. An additional layer of an alloy of the metal particles and the metal of the top layer is formed that has a higher reflectivity than a layer only comprising the metal particles would have.

Through advancing the phase of radio frequency (RF) excitation with each phase-encoding level, a method and apparatus increases the effectiveness of a Magnetic Resonance Imaging (MRI) device by correcting for main magnetic field inhomogeneities without noticeably decreasing the signal-to-noise ratio. The present invention also increases the effectiveness of fast imaging with steady precession (FISP) scans and allows FISP scans to image multiple slices. In an MRI device, a patient is subjected to a constant magnetic field, and RF pulses are used to excite the nuclei in the patient's body. The nuclei release a corresponding RF signal as the nuclei relax, which can be measured and mapped into a visual display. The RF pulses used to excite the nuclei in the body cooperate with a slice select gradient and a phase-encoding gradient. When the RF pulse is phase shifted with each phase-encoding gradient level, improved signal-to-noise ratios are observed.

A method for forming a model simulating production, by an underground reservoir subject to depletion, of hydrocarbons comprising notably relatively high-viscosity oils. From laboratory measurements of the respective volumes of oil and gas produced by rock samples from the reservoir subject to depletion, and the relative permeabilities (Kr) of rock samples to hydrocarbons, a model of the formation and flow of the gas fraction is used to determine a volume transfer coefficient (hv) by means of an empirical function representing the distribution of nuclei that can be activated at a pressure P (function N(P)) which is calibrated with reference to the previous measurements. Considering that the nuclei distribution N(P) in the reservoir rocks is the same as the distribution measured in the laboratory, the numerical transfer coefficient corresponding thereto in the reservoir at selected depletion rates is determined using the gas fraction formation and flow model, which allows predicting the relative permeabilities in the reservoir and the production thereof which is useful for reservoir engineering. Method for forming a model allowing to simulate the production, by an underground reservoir subjected to depletion, of hydrocarbons comprising notably relatively high-viscosity oils. From laboratory measurements of the respective volumes of oil and gas produced by rock samples from the reservoir and subjected to depletion, and the relative permeabilities (Kr) of rock samples to hydrocarbons, a model of the formation and flow of the gas fraction is used to determine a volume transfer coefficient (hv) by means of an empirical function representing the distribution of nuclei that can be activated at a pressure P (function N(P)) which is calibrated with reference to the previous measurements. Considering that the nuclei distribution N(P) in the reservoir rocks is the same as the distribution measured in the laboratory, the numerical transfer coefficient corresponding thereto in the reservoir at selected depletion rates is determined using the gas fraction formation and flow model, which allows to predict the relative permeabilities in the reservoir and the production thereof. Applications notably reservoir engineering.

The invention provides a formation element capture gamma-ray spectra measurement method and device, and belongs to the technical field of oil-gas exploration logging. The method comprises the steps that a neutron source is slowed down according to the neutron capture cross section of samples to be measured; and standard capture gamma-ray spectra of the samples to be measured can be acquired through measurement when thermal neutron flux of reaction of the neutron source through slowing down and the atomic nucleus of the samples to be measured reaches the position of the preset value. The neutron source is slowed down according to the neutron capture cross section of different samples to be measured so that the element capture gamma-ray spectra of the samples to be measured can be acquired through measurement, and multiple types of formation element capture gamma-ray spectra with higher accuracy can be acquired.

A compact accelerator system having an integrated particle generator-linear accelerator with a compact, small-scale construction capable of producing an energetic (˜70-250 MeV) proton beam or other nuclei and transporting the beam direction to a medical therapy patient without the need for bending magnets or other hardware often required for remote beam transport. The integrated particle generator-accelerator is actuable as a unitary body on a support structure to enable scanning of a particle beam by direction actuation of the particle generator-accelerator.

The invention provides a method for measuring the rotating angle of an aircraft based on nuclear magnetic resonance. The method is characterized in that two isotope nucleuses with the same element and different gyromagnetic ratios serve as a measurement carrier of an aircraft rotating angle measurement gyroscope; an alkali metal element is added into a cylindrical glass sealed cavity in a nuclear magnetic resonance resonant cavity of the aircraft rotating angle measurement gyroscope based on a spin polarization exchange mechanism; electron spin polarization of alkali metal atoms is transferred to two isotopic atoms serving as the rotating speed measurement carrier of the gyroscope to cause net nucleus spin polarization of the two isotopic atoms. Therefore, the magnetic polarization strength of the isotopic measurement carrier can be improved, and a signal to noise ratio of a detected signal can be improved.

The present invention relates to a set of multi-doped cerium-activated scintillation materials of the solid solutions on the basis of the rare earth silicate, comprising lutetium and having compositions represented by the chemical formulas: (Lu_2−w−x+2yA_wCe_xSi_1−y)_1−zMe_xJ_jO_q and (Lu_{2−w−x−2y}A_wCe_xSi_1+y)_1−zMe_zJ_jO_q. The invention is useful for detection of elementary particles and nuclei in high-energy physics, nuclear industry; medicine, Positron Emission Tomography (TOF PET and DOI PET scanners) and Single Photon Emission Computed Tomography (SPECT), Positron Emission Tomography with Magnetic Resonance imaging (PET/MR); X-ray computer fluorography; non-destructive testing of solid state structure, including airport security systems, the Gamma-ray systems for the inspection of trucks and cargo containers.

The invention provides a method and a device for evaluating abundance of organic matter of a hydrocarbon source rock, wherein the method comprises the following steps: emitting high-energy neutron to a stratum; recording an inelastic scattering gamma-ray spectra generated by the interaction of nucleus of elements in the stratum and the high-energy neutron; analyzing the inelastic scattering gamma-ray spectra, to obtain the content of elements in the stratum; obtaining the content of inorganic carbon in the stratum by using the elements associated with the content of the inorganic carbon; deducting the content of the inorganic carbon from the total carbon content of the stratum, so as to obtain the content of the organic carbon in the stratum; evaluating the abundance of organic matter of the hydrocarbon source rock by using the content of the organic carbon element.

The present invention relates to a technique that can be used to reduce the sensitivity of integrated circuits to a failure mechanism to which some integrated circuits (ICs) are susceptible, known as latchup. The present invention relates to a scheme for suppressing latchup sensitivity by a step to be performed after the IC has been manufactured, rather than being a step in the normal production process. The process involves exposing silicon, either in wafer or die form, to energetic ions, such as protons (hydrogen nuclei) or heavier nuclei (e.g. argon, copper, gold, etc.), having energy sufficient to penetrate the silicon from the back of the wafer or die to within a well-defined distance from the surface of the silicon on which the integrated circuit has been formed (the front surface). The ions will enter the silicon through the surface of the silicon opposite to the surface onto which the integrated circuit has been formed (the back surface), will travel through the silicon, and will be completely stopped within a narrow, controlled distance from the front surface. This very high energy ion implantation will change the properties of silicon in such a way that the process or processes responsible for latchup are inhibited, either from the structural damage done to the single crystal, or from changes in the electrical properties of the silicon due to the chemical properties of the implanted ions, or both. Since the implanted ions all stop within a narrow region, spaced away from the region in which the components of the integrated circuit are located, the functionality and parameters of the IC are not degraded. Consequently, the procedure of the present invention is a method of processing silicon wafers or die so that the sensitivity of the ICs on this wafer or die to latchup is reduced or eliminated.

The invention discloses environment-friendly aqueous road paint and manufacturing method thereof. Components such as water, a dispersing agent, inorganic salt fillers, diatomite, a wetting agent, rutile type titanium white powder, photocatalyst, acrylic emulsion, a pH regulating agent, a defoaming agent, a thickening agent, a film forming aid, and the like are sufficiently mixed according to a certain process flow. By utilizing the strong adsorptive capacity of the diatomite, harmful substances in vehicle exhausts are absorbed in a coating containing the photocatalyst, and the photocatalyst absorbs optical energy amount to below bandgap energy under the irradiation of light so as to ensure that electrons of the photocatalyst obtain certain energy to separate from the constraints of atomic nucleuses and electron orbits and become free electrons, thus various harmful gases in the vehicle exhausts, such as carbon monoxide, hydrocarbons, nitric oxides and the like can be oxidized and decomposed to finally form carbon dioxide, water and other innocuous substances having no harm to the human body so as to achieve the purpose of degrading the vehicle exhausts, thereby reducing photochemical smog phenomena.

The invention relates to a power system, in particular to an atomic motion simulator for automatically making circumferential rotation motion without external energy or power. The known structure of an atom comprises an atomic nucleus, protons, electrons, neutrons, and the like, but the real structure inside the atom and perpetual generating mechanism inside the atomic nucleus cannot be known. The atomic motion simulator can help human beings to know the perpetual mechanism inside the atom and provide new methods for acquiring infinite clean energy and power.

The present invention relates to a magnetic resonance structure with a cavity or a reserved space that provides contrast and the additional ability to frequency-shift the spectral signature of the NMR-susceptible nuclei such as water protons by a discrete and controllable characteristic frequency shift that is unique to each MRS design. The invention also relates to nearly uniform solid magnetic resonance T₂* contrast agents that have a significantly higher magnetic moment compared to similarly-sized existing MRI contrast agents.

The invention discloses a method for separate imaging of water and fat based on inversion recovery technology, which includes the following steps of: determining a first inversion recovery time when the longitudinal magnetization component of hydrogen atomic nucleus in fat or water is zero; respectively selecting a second inversion recovery time and a third inversion time before and after the first inversion recovery time; during the second and the third inversion recovery time, respectively using a scanning sequence to excite a detected object and obtaining two images simultaneously including a pure water image and a pure fat image; synthesizing the two obtained images; and when the synthesis removes the pure fat image included in the two images, obtaining a pure water image, when the synthesis removes the pure water image included in the two images, obtaining a pure fat image. By the use of the invention, the pure water image and the pure fat image can be obtained at one time by using the scanning sequence to excite the detected object and the signal-to-noise ratio of the images is relatively high.