RAD 2.3.txt

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Anonymous
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276269
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RAD 2.3.txt
Updated:
2014-06-06 14:00:56
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Rad 2.3
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  1. RADIOACTIVE DECAY
  2. the spontaneous transformation of one nuclide into a different nuclide or into a different energy state of the same nuclide
  3. DEFINE CURIE (Ci)
  4. a unit of radioactivity
  5. one curie equals 3.7x1010 nuclear disintegrations per second (dps)
  6. BECQUEREL (Bq)
  7. a unit of radioactivity in the international System of units (SI)
  8. one disintegration per secons (dps)
  9. 1Ci=3.7x1010 Bq
  10. RADIATION HALF LIFE (t1/2)
  11. the time required for the activity of a given radioactive element to decrease by one-half due to radioactive decay
  12. t1/2 of 60Co=5.27 yrs
  13. BIOLOGICAL HALF LIFE (t1/2Bio)
  14. the time required for the body to eliminate
    by natural means
  15. EFEFCTIVE HALF LIFE (t1/2Eff)
  16. the time required for a radioactive element in the body to be diminish by 50% as a result of the combined action of radioactive decay and biological elimination
  17. EXPLAIN THE PROCESS OF APLHA (α)PARTICLE EMISSIONS
  18. the particle is emitted from a proton rich nucleus
    the atomic mass number (A) decrease by 4
  19. EXPLAIN THE PROCESS OF BETA MINUS β- PARTICLE EMISSION  
  20. EXPLAIN THE PROCESS OF A BETA PLUS β+ PARTICLE EMISSION 
  21. occurs in a proton rich nucleus
    a proton is converted into ea neutron
  22. DEFINE ISOMERIC TRANSITIONS
  23. the Z and the A of the daughter nucleus is the same as the parent nucleus
  24. DESCRIBE THE CHARACTERISITICS OF GAMMA RAY EMISSIONS
  25. may occur after gamma beta and/or positron decay when the daugther nuclei is still in an excited state
  26. the excited nulues will eliminate the extra energy by emitting a gamma ray
  27. released immediately 
  28. EXPLAIN THE DIFFERENCE BETWEEN GAMMA RAY EMISSION AND METASTABLE DECAY
  29. metestable decay are isomeric transition where the gamma ray release is much longer than a microsecond (1x10-6sec)

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