Alpha Particle definition

Alpha Particle means a particle identical with a helium nucleus, emitted from the nucleus of a radioactive element.
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Alpha Particle means a positively charged particle emitted by certain radioactive materials. It is the least penetrating of the three common types of radiation (alpha, beta and gamma) and usually is not dangerous to plants, animals or humans.
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Alpha Particle means a positively charged atomic particle consisting of 2 neutrons and 2 protons.
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Examples of Alpha Particle in a sentence

  • If Gross Alpha Particle Activity is greater than 15 pCi/L, then test for adjusted gross alpha particle activity.

  • MCLs and Monitoring - Gross Alpha Particle Activity, Radium-226, Radium-228, and Uranium 107§64443.

  • Thousands of poor children and youths from these two countries are not enrolled in school, as they have no access to pre-school, primary or secondary education opportunities.• There is no doubt that Central America needs to increase and improve investment in education.

  • MIRD Cellular S Values: Self-Absorbed Dose per Unit Cumulated Activity for Selected Radionuclides and Monoenergetic Electron and Alpha Particle Emitters Incorporated into Different Cell Compartments.

  • The cooperation involves German provision of Alpha Particle X-Ray Spectrometer (APXS) engineering and flight models, which will be part of the two rovers' Athena payloads.

  • This in turn can make the spectrum measurement during the pulse very difficult [GOZ96].2.3.5. Associated (Alpha) Particle – Time-of-Flight Neutron Analysis (API-TOF):The Associated (alpha) Particle technique (or API, Associated Particle Imaging) uses an interesting property of the deuterium-tritium (D-T) reaction previously described, namely that the source emits a lower energy alpha particle simultaneously with, and at exactly at 180 degrees (“back-to-back”) to, each fast 14 MeV neutron produced.

  • Alpha Particle: A positively charged particle ejected spontaneously from the nuclei of some radioactive elements.

  • These parameters are to be analyzed only if the concentration of Gross Alpha Particle Activity exceeds the parameter’s AL or AQL.

  • Table JBAT for Combined Radium-226 and Radium-228, Uranium,Gross Alpha Particle Activity, and Beta Particle and Photon Radioactivity ContaminantBAT1.

  • Ibid, Designation D–1943–81, ‘‘Standard Test Method for Alpha Particle Radioac- tivity of Water’’.

Related to Alpha Particle

  • Volatile organic compounds or “VOC” means any compound of carbon, excluding carbon monoxide, carbon dioxide, carbonic acid, metallic carbides or carbonates, and ammonium carbonate, which participates in atmospheric photochemical reactions.

  • Volatile organic compound (VOC) means any organic compound as well as the fraction of creosote, having at 293.15 K a vapour pressure of 0.01 kPa or more, or having a corresponding volatility under the particular conditions of use;

  • Alternative nicotine product means any vaping product, whether or not it includes nicotine, including electronic smoking devices, that can be ingested into the body by chewing, smoking, absorbing, dissolving, inhaling, or by any other means. ‘Alternative nicotine product’ does not include:

  • Reagent means any product other than fuel that is stored on-board the vehicle and is provided to the exhaust after-treatment system upon request of the emission control system.

  • Biomarker means a parameter or characteristic in a patient or Patient Sample, the measurement of which is useful (a) for purposes of selecting appropriate therapies or patient populations or monitoring disease susceptibility, severity or state, or monitoring therapies for such patient and/or (b) for predicting the outcome of a particular treatment of such patient.

  • Volatile Organic Compound (VOC means any compound containing at least one atom of carbon, excluding carbon monoxide, carbon dioxide, carbonic acid, metallic carbides or carbonates, and ammonium carbonate, and excluding the following: