click below
click below
Normal Size Small Size show me how
Unit 1 Rad Bio
Question | Answer |
---|---|
Give the description of Alpha | double ionized atom |
Give the description of Beta negatron | negative electron |
Give the description of Beta positron | Positive electron |
Give the description of Proton | Hydrogen Nuclei |
Give the description of Negative Mesons | Negatively charged particle with a mass 273 times that of an electron |
Give the descrption of a Heavy Nuclei | Any atom stripped of all its electrons |
Give a description of Neutrons | Neutron |
Give the description of gamma | electromagnetic radiation |
Give the description of x-rays | electromagnetic radiation |
Give the mass and charge of Alpha | M= 4 C= +2 |
Give the mass and charge of Beta Negatron | M= .000555 C= -1 |
Give the mass and charge of Beta Positron | M= .000555 C= +1 |
Give the mass and charge of Proton | M= 1 C= +1 |
Give the mass and Charge of Negative Mesons | M= .15 C= -1 |
Give the mass and charge of Heavy Nuclei | M= Varies C= varies but ALWAYS Positive |
Give the mass and charge of Netrons | M= 1 C= 0 |
Give the mass and charge of Gamma | M= 0 C= 0 |
Give the mass and charge of x-rays | M= 0 C= 0 |
Define excitation | Where a small amount of energy moves an outer shell electron(valence electron) to the higher energy shell... could cause covalent bonding changes |
Define LET(Linear Energy Transfer) | The number or amount of ionization of ion particles over a certain time, period, or path |
Whats does the Bragg Peak indicate? | It shows the dramatic increase in ionization just before coming to a rest |
List the types of particulate radiation in order from highest to lowest | Alpha, proton, neutrons, and electrons |
List the types of particulate radiation in ordee from lowest to highest | Electrons, neutrons, protons, and Alpha |
What are the three main factors of magnetic attraction in LET | particle charge, particle velocity,and the distance between the charges |
Explain particle charge in LET | The effect of two charged bodies on the other will depend on the Amount of charge: the rate at which energy is lost depends on the square of the charge of the particle |
Explain particle velocity in LET | The slower the moving charged particles will produce more ionization per unit path length- The ionization of a charged particle reaches the highest point just before coming to a rest |
Explain the distances between charges in LET | This follows the inverse square law, double the distance the attraction is reduced by 4 times... Decrease the distance by 5 times then the attraction will increase by 25 times |
List the three ways that radiation can transfer energy | Electromagnetic radiation, uncharged particulate radiation, and charged particulate radiation |
Explain what happens during electromagnetic radiation transfer | Because they have no mass or no charge the energy is transferred through collision/ a direct hit(determined by density of matter irriated, energy of photons, and atomic number |
Explain what happens during uncharged particulate radiation transfer | Neutrons has mass but no charge, they undergo direct action through collision or capture/ The neutron comes close to the nucleus of an atom and the nuclues pulls it inside by capture/ can cause a radioactive atom |
Explain what happens during charged particulate radiation transfer | Because these types of radiation have a mass and have a charge they cause direct action through collision, capture, and/or magnetic attraction/ like charges repulse and oppisites atrract |
The effects of living matter is a result of | Energy transferred |
What is the principle way radiation is transferred | Ionization |
What relates the biological effect to energy absorbed | RBE(relative biological effectiveness) |
As RBE is increased what happens to LET | it increases |
The ionized atom and the ejected electron are known as | an ion pair |