X- rays

Question 1

What mean the X- rays?

Answer 1

electromagnetic radiation (EMR) of
very short wave length ( 0.1 A° ) & very high penetrating power.

Question 2

Where can use the X- rays?

Answer 2

is very useful in

diagnosis & radio therapy

Question 3

What you need to produce photons of X- ray?

Answer 3

1. a filament
2. target
3. high positive voltage
4. an evacuated space
5. the space between the tubes insert

Question 4

What you need to produce photons of X- ray?

Answer 4

1. a filament
2. target
3. high positive voltage
4. an evacuated space
5. the space between the tubes insert

Question 5

which is a source of electrons?

Answer 5

is a concave part of cathode

Question 6

What the anode in the X-ray?

Answer 6

which is strike by the
electrons

Question 7

which is strike by the
electrons that anode?

Answer 7

negative charge &
these electrons are repelled by the cathode &
attracted to the anode reaching it with very high kinetic energy

Question 8

What benefits of high positive for voltage applied between the
cathode & anode ?

Answer 8

to accelerate the negative
electrons. In diagnostic radiotherapy , this
usually within the range 40 – 120 Kev

Question 9

What the benefits of an evacuated space ( with low pressure 10 ̅
^6 tor )?

Answer 9

which accelerate the electrons from
the cathode to the anode.

Question 10

the space between the tubes insert ( the
enveloped & electrode ) & the shield is filled
with oil,why?

Answer 10

the oil converts heat from the insert to the tube shield (oil used to cool the target )

Question 11

What can do of the remaining few energy ( 0.2% ) of the energy of striking the
target ?

Answer 11

produce useful X- rays.

Question 12

What happens of the energy of most electrons striking the
target ( 99.8% )?

Answer 12

is dissipated in the form of heat.

Question 13

Bremsstrahlung ( continuous ) X- rays :

Answer 13

When the electron get close enough to the
nucleus of a target atom to be diverted from
its path & emits an x- ray photon that has
some of its energy.

Question 14

When the electron get close enough to the

nucleus , what occur?

Answer 14

to be diverted from
its path & emits an x- ray photon that has
some of its energy.

Question 15

The amount of Bremsstrahlung produced for
a given number of electrons striking the anode
depends upon two factors:

Answer 15

A-the Z (atomic wieght)of the target

B- the kilovolt peak

Question 16

X-rays photon produced
by an x- ray machine are:

Answer 16

heterogeneous in energy.