positron造句
1. When an electron collides with a positron the two particles disappear, or annihilate, to create a high-energy photon.
2. The electron - positron pair may survive without recombining.
3. The positron is an antielectron.
4. The antielectron, or positron, was discovered in 1932.
5. This was confirmed by the positron annihilation technique.
6. Positron emission tomography imaging was performed to measure specific microvascular blood flow at rest and during pharmacological vasodilation by IV dipyridamole.
7. The Harvard group use positron emission tomography ( PET ) scans to monitor the brain activity.
8. The Positron lifetime spectra of unannealed and annealed Ni-coats, electro-plated from the four typical baths, have been measured.
9. Positron emission tomography ( PET ) is a non - invasive method to detect the distribution of radionuclide in vivo.
10. The antihydrogen atoms are composed of a positron (an antimatter electron) orbiting an antiproton nucleus.
11. Magnetized water samples were measured by the positron annihilation lifetime spectrometer.
12. It is found that positron at the grass- boundary can be trapped by zinc vacancies and vacancy defect.
13. One signature of positron - electron annihilation is gamma rays carrying 511 thousand electron - volts ( keV ) of energy.
14. Colonography comb in ining the imaging procedures of positron emission tomography (PET) and computed tomography (CT) provides whole-body tumor staging in as ingle session.
15. We investigate physicss properties of positronium and the way of positron - electron annihilation.
16. The applications of positron annihilation technique in the research of some metal - functional materials are introduced.
17. Objective To evaluate the value of high energy positron imaging in the diagnosis of colon neoplasm.
18. The nuclide chart involves electron, positron, antiproton, antineutron, photon to exhibit the symmetry of mass and charge ideally.
19. Objective To determine the usefulness of positron emission tomography(PET) with fluoro 2 deoxyglucose (FDG PET) in lung cancer.
20. Positron emission tomography ( PET ) is an imaging technique that combines a radioactive tracer with a molecule.
21. You can read more about Positron by viewing the Positron Company Profile.
22. The Dark Era begins when space is dominated by tiny particles such as photons, electrons and positrons.
23. The technologies of radionuclide section imaging tomograph included single photon emission computed of tomograph (SPECT) and positron emission computed tomograph (PET).
24. These new tests are resonance imaging ( MRI ) and positron emission tomography ( PET ) scanning of the heart.
25. Occasionally a collision produced an electron-positron pair, with the positron and antiproton flying off together and forming an antihydrogen atom./positron.html
26. An atom of antihydrogen, for instance, is composed of a negatively-charged antiproton being orbited by a positively-charged positron.
27. The vacancy defects of samples were measured by slow positron annihilation.
28. As an example with the injector linac for Beijing Electron Positron Collider upgrading project (BEPCII), the beam orbit offset caused by the above error effects have been simul...
29. After an immeasurably short time interval, the electron - positron pair recombine.
30. If we are a very professional high - energy physicists, using electron - positron collider experiments.
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