• Expressed as dose delivered per individual neutron • Units are those of dose per neutron/cm2 (Gy cm2 )

N = atom density (cm^-3)

σ_S = scattering cross section (for each element)

Q_ave = average energy transferred in collision (½E_max)

ρ = tissue density

57. Сalculation of heavy ions protection. A track structure model for the calculation of inactivation probabilities of heavy ions has been developed, which is based on measurable quantities only. The model describes the following inactivation properties of heavy ion radiation: (1) the transition from shouldered to exponential survival curves, depending on the atomic number, energy and LET of the particle; (2) the LET dependence of inactivation cross sections s, including the supralinear increase for low LET particles, the plateau region between 200 and 1000 keV.µm-1 and the s LET hooks for higher LET values; (3) differences in the shape of the s LET hooks for different biological objects; (4) the shift of RBE maxima from 30 to 300 keV.µm-1 with increasing atomic number; (5) the exchanged efficiency of heavy ions in the case of mixed radiation fields (X rays combined with heavy ion irradiation).

вопросы

1. The basic definition of interaction of ionizing radiation with matter

2. The biology influence of ionization radiation

3. Radiation sickness

4. The radioactivity law

5. The activity of radionuclides

6. The unit of measurement

7. Protons, alpha particles and heavy ions

8. Ionization loses

9. Elastic and inelastic scattering of heavy charge particle

10. Multiple scattering of the recoil of heavy charge particle

11. Nuclear reactions

12. Ionizing losses, Radiation losses of electrons

13. Elastic scattering of electron

14. Characteristic X-ray radiation

15. The law of gamma radiation

31. Interaction of gamma rays with matter

32. Photoelectric absorption

33. Thomson scattering

34. Compton effect

35. The creation of electron-positron pair

36. The total coefficient of gamma radiation attenuation

37. Classification of neutrons

38. Elastic scattering of neutrons

39. Recoil nuclei

40. The radioactive capture

41. Nuclear reaction with neutron

42. Classification of particles and antiparticles

43. Annihilation

44. Units of radiation dose

45. Equivalent dose

46. Ionizing method

47. Scintillating method

48. Photographic method

49. Calorimetric method

50. Chemical method

51. The method of neutron registration

52. Calculation of neutron dose

53. Dosimetric controlling npp

54. Calculation of gamma rays protection

55. Calculation alpha radiation protection

56. Calculations of beta radiation protection

57. Сalculation of heavy ions protection

58. Calculation of neutron radiation protection

59. The cross section of neutrons, protons

60. Fundamental forces