p pa pb pc pd pe pf pg ph pi pk pl pm pn po pp pr ps pt pu pv pw px py

Перевод: positron

[существительное]
позитрон

Тезаурус:

1. Their technique is to look for the process known as "inverse beta decay", in which an electron- anti neutrino reacts with a proton to produce a positron (positive electron) and a neutron.
2. A single electron or positron cannot identify a W - of W + with certainty; there is always a neutrino emitted with the electron in the decay and this cannot be detected.
3. The recent calculations were done only for the collision of an electron and a positron, a collision common in particle accelerators.
4. The researchers have looked for a specific decay of the proton, namely into a positron and a neutral pi-meson (n).
5. The viewing medium can be X-rays, as in computerized tomographic (CT) scans; magnetic resonance of atomic nuclei, as in nuclear magnetic resonance (NMR) scans; or emission from radioactively labelled substances incorporated into the structure of nerve cells as in positron emission tomographic (PET) scans.
6. There is a radioactive process - beta decay - which enables one of the protons to shed its charge, in effect becoming a neutron at the instant of fusing (the electrical charge being carried off by a positively charged form of the electron, known as a positron), the proton and neutron fusing to make a deuteron and liberating energy.
7. Work presented at last summer's high-energy physics conference in Paris gave an upper limit of 2.25 x 10 31 years for a proton decaying into a positron and a.
8. By measuring the energy spectrum of the positron, the researchers effectively measure the spectrum of the antineutrinos arriving at the detector.
9. What they do see is a high-energy electron (positron) that appears to come from the decay of a W - (W - ).
10. When an electron collides with a positron the two particles disappear, or annihilate, to create a high-energy photon.
11. What the apparatus "sees" is the decay of the Z o into an electron and a positron (an antielectron) flying off back to back from the point of the collision.
12. If a Z o were produced which decayed into an electron positron pair, observation of both particles in the pair would give a definite identification of the Z o and its mass.
13. If they do really emanate from a Z o the electron and positron should together carry energy equal to the particle's mass, and this seems to be the case.