Physics Ch 15 Brachytherapy Test 4/12

The time period in which the activity decays to one half the original value:

The average lifetime for the decay of radioactive atoms:

What is the half-life of Radium 226?

What is the half-life of Cobalt 60?

What is the half-life of Cesium 137?

What is the half-life of Iridium 192?

What is the half-life of Iodine 125?

What is the half-life of Palladium 103?

What is the half-life of Gold 198?

What is the half-life of Radon 222?

Radium 226 decays mainly by ________ _______.

What is the half-life equation that shows its relationship with the decay constant:

The relationship between activity and half-life is _________ proportional.

It is assumed that 1 mg of Radium will have an activity of:

Sources that have the same concentration of radioactivity throughout their active length are called:

Radium 226 is part of a long decay chain that begins with ________ and concludes with________.

Most brachytherapy procedures were developed using _________.

The activity per unit of mass of a radioactive material (C/g):

The thickness of the source capsule is known as:

A source which is heavily loaded with activity at one end:

A source which has heavy loading at both ends with lighter activity concentration in the middle:

Which isotope has largely replaced radium as the primary isotope for brachytherapy of the uterus and cervix?

Which isotope is a popular replacement for Radon 222 in permanent implants and has a very short half-life 2.7 days?

What was the first radioisotope to be identified and isolated?

When using both tandem and ovoids in a gynecological implant, the typical resultant dose distribution has the shape of a:

What describes the fraction of the number of atoms that decay per unit time?

Radium sources are leak tested to check for:

The most commonly used permanent implant isotopes are:

Isotopes with a shorter half life are more likely to be used as __________ implants.

Isotopes with a longer half life are more likely to be used as __________ implants.