nuclear isomer उदाहरण वाक्य

उदाहरण वाक्य

1. However, radioactivity of this nuclear isomer has never been observed, and only a lower limit on its half life of 2.0 ?10 16 years has been set.
2. Nuclear isomers are members of a set of nuclides with equal proton number and equal mass number ( thus making them by definition the same isotope ), but different states of excitation.
3. Tc-99m's half life of 6.0058 hours is considerably longer ( by 14 orders of magnitude, at least ) than most nuclear isomers, though not unique.
4. All atoms of a given element are not necessarily identical, however, as the number of neutrons may vary to form different isotopes, and energy levels may differ forming different nuclear isomers.
5. There are also 17 nuclear isomers, with half lives of up to 154 days . Tellurium ( 106 Te to 110 Te ) is among the lightest elements known to undergo alpha decay.
6. The ground state of 180 Ta has a half life of only 8 hours . 180m Ta is the only naturally occurring nuclear isomer ( excluding radiogenic and cosmogenic short-living nuclides ).
7. The most long-lived non-ground state nuclear isomer is the nuclide tantalum-180m ( ), which has a half-life in excess of 1, 000 trillion years.
8. The longer lives of nuclear isomers ( metastable states ) are often due to the larger degree of nuclear spin change which must be involved in their gamma emission to reach the ground state.
9. One isotope, 229 Th, has a nuclear isomer ( or metastable state ) with a remarkably low excitation energy, recently measured to be 7.6 ?0.5 eV.
10. *Nuclear isomers " may " be increased or decreased in energy by absorption of photons of the right frequency, or internal transitions with electron potential differences of the right frequency.