conversion electron sentence in Hindi
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- The germanium isotope emits two weak gamma rays and a conversion electron.
- 125 I ), 7 % of the decays emit energy as a gamma ray, while 93 % release energy as conversion electrons.
- The damage from the more penetrating gamma radiation and 127 keV internal conversion electron radiation from the initial decay of Te-123 is moderated by the relatively short half-life of the isotope.
- Excited Te-125 from EC decay of I-125 also emits a much lower-energy internal conversion electron ( 35.5 keV ), which does relatively little damage due to its low energy, even though its emission is more common.
- This excess energy can be either emitted from the nucleus as gamma radiation, or create and emit from the nucleus a new particle ( alpha particle or beta particle ), or transfer this excess energy to one of its electrons, causing that electron to be ejected as a conversion electron.
- The electron capture produces a tellurium-125 nucleus in an excited state with a half-life of 1.6 ns, which undergoes gamma decay emitting a photon or an internal conversion electron at 35.5 keV . A second electron relaxation cascade follows the gamma decay before the nuclide comes to rest.
- The remaining approximately 12 % of 99m Tc decays are by means of internal conversion, resulting in ejection of high speed internal conversion electrons in several sharp peaks ( as is typical of electrons from this type of decay ) also at about 140 keV ( 99m Tc ?! 99 Tc + + e " ).
- In the case of conversion electrons, the binding energy must also be taken into account : The energy of a conversion electron is given as E = ( E _ i-E _ f )-E _ B, where E _ i and E _ f are the energies of the nucleus in its initial and final states, respectively, while E _ B is the binding energy of the electron.
- In the case of conversion electrons, the binding energy must also be taken into account : The energy of a conversion electron is given as E = ( E _ i-E _ f )-E _ B, where E _ i and E _ f are the energies of the nucleus in its initial and final states, respectively, while E _ B is the binding energy of the electron.
- Just as an atom may produce an internal conversion electron in place of a gamma ray if energy is available from within the nucleus, so an atom may produce an Auger electron in place of an x ray if an electron is missing from one of the low-lying electron shells . ( The first process can even precipitate the second one . ) Like IC electrons, Auger electrons have a discrete energy, resulting in a sharp energy peak in the spectrum.
- This excited state of Te-123 produced is not the metastable nuclear isomer Te-123m ( the decay of I-123 does not involve enough energy to produce Te-123m ), but rather is a lower-energy nuclear isomer of Te-123 that immediately gamma decays to ground state Te-123 at the energies noted, or else ( 13 % of the time ) decays by internal conversion electron emission ( 127 keV ), followed by an average of 11 Auger electrons emitted at very low energies ( 50-500 eV ).
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