Radionucleids

Question 1

What is an:

1. Isotope
2. Isotone
3. Isobar
4. Isomer

Answer 1

1. Isotope - atoms with same Z different A
2. Isotone - same number of neutrons
3. Isobar - same A
4. Isomer - different excitation state (metastate)

Z = number of protons in the nucleus
A = number of protons + neutrons in the nucleus (mass number)

Question 2

What are atoms with the same number of neutrons called?

Answer 2

Isotones

Question 3

What are atoms with the same number of protons called (different number of neutrons)?

Answer 3

Isotopes

Question 4

What are atoms with the same A called?

Answer 4

Isobars

Question 5

What are atoms in an excited state called (nuclear state)?

Answer 5

Isomers

Question 6

Draw a chart of nuclides

Answer 6

Question 7

How do we read production routs?
For example ¹⁸O (p,n) ¹⁸F

Answer 7

¹⁸O is bombarded with protons (p) and n=knocks out a neutron (n) to produce ¹⁸F

Question 8

Where are different decays (beta +, beta -, etc) on the chart of nuclides?

Answer 8

Question 9

What are two decay processes to get Lu-177 ? Which one has less carrier?

Answer 9

1. ¹⁷⁶Lu (n,y) ¹⁷⁷Lu
2. ¹⁷⁶Yb (n,y) ¹⁷⁷Yb(b-) ¹⁷⁷Lu

Target enrichment for 1. is 72%, for 2. is 98%

Reaction1. Lu-176 to Lu-177 has MORE carrier