Radioactive Decay and Imaging Techniques

The video tutorial discusses radioactive decay, focusing on alpha, beta, and gamma decay processes. It explains the structure of the nucleus, including protons, neutrons, and electron clouds. Alpha decay involves the emission of a helium nucleus, reducing the atomic number and mass. Beta decay includes beta-minus and beta-plus processes, involving electron and positron emissions, respectively. Gamma decay follows alpha or beta decay, emitting gamma rays to stabilize the nucleus. The tutorial also touches on applications like positron emission tomography and spect imaging.

What is the primary change that occurs during radioactive decay?

• Electrons are added to the atom.

• The atom becomes a different element.

• The nucleus gains protons.

• The nucleus loses part of its structure.

In alpha decay, what type of particle is emitted from the nucleus?

• A neutron

• A proton

• A helium nucleus

• An electron

What happens to the atomic number during alpha decay?

• It remains the same.

• It increases by 1.

• It increases by 2.

• It decreases by 2.

During beta minus decay, what transformation occurs in the nucleus?

• A positron is emitted.

• A neutron is converted to a proton.

• A proton is converted to a neutron.

• An electron is added to the nucleus.

What is emitted during beta plus decay?

• A proton

• An electron

• A positron

• A neutron

What is the role of gamma decay in the nucleus?

• To emit a neutron

• To increase the atomic number

• To convert protons to neutrons

• To stabilize the nucleus

Which type of radiation is emitted during gamma decay?

• Alpha particles

• Beta particles

• Gamma rays

• Neutrons

What imaging technique uses positron emission?

• PET scan

• MRI

• Ultrasound

• CT scan

In SPECT imaging, what is primarily measured?

• Alpha particles

• Beta particles

• Gamma rays

• Neutrons

What is the main purpose of using radioactive decay in medical imaging?

• To visualize internal body structures

• To convert protons to neutrons

• To create new elements

• To increase the size of the nucleus