Sources

Question 1

Tc-99 m half life

Answer 1

6 h
bio half life is 1 day

Question 2

Tc-99 m radiation

Answer 2

140 keV gamma emission and IC; IC adds dose but doesn’t give info

Question 3

how is Tc-99 m made?

Answer 3

eluted from Mo-99 (1/2 life 66 h)

Question 4

I-131 radiation

Answer 4

beta particle
Emits gamma rays 360-720 keV plus 250-800 keV betas

Question 5

half life I-131

Answer 5

8 days

Question 6

how is I-131 made?

Answer 6

Most 131I production is from neutron irradiation of a natural tellurium target in a nuclear reactor.

Question 7

Pd-103 radiation

Answer 7

-electron capture, releases characteristic xrays
0.021 keV

Question 8

Pd-103 1/2 life

Answer 8

17 days

Question 9

Pd 103 HVL and TVL

Answer 9

0.01 mm Pb and 0.04 mm Pb

Question 10

Pd-103 gamma factor

Answer 10

17.6 uGym2/GBqh

Question 11

Pd-103 activity at insertion

Answer 11

~ 1 mCi

Question 12

how is Pd-103 produced?

Answer 12

Pd can be produced in the neutron activation of 102Pd: 102Pd(n,γ)103Pd and by nuclear reaction with a proton beam: rhodium 103 (103Rh)(p,n)103Pd

Question 13

How is I-125 produced?

Answer 13

Xe-124 is bombarded with thermal neutrons in a nuclear reactor to yield metastable Xe-125 via neutron capture which decays to I-125 via beta plus decay

Question 14

I-125 radiation

Answer 14

100% electron capture, releases gammas
-IC and auger electrons cause little damage outside the cell which contains the isotope atom
-0.028 keV

Question 15

I-125 1/2 life

Answer 15

60 d

Question 16

I-125 HVL and TVL

Answer 16

0.02 mm Pb and 0.07 mm Pb

Question 17

I-125 gamma constant

Answer 17

34.4 uGym2/GBQh

Question 18

how do you create Ir-192?

Answer 18

created by neutron bombardment (activation) of Ir-191 in a nuclear reactor

Question 19

Ir-192 radiation

Answer 19

-0.38 MeV
–decays 95% of time to 192 Pt through beta emission
-for remaining 5 % of time, decays through electron capture to 192 Os. Gamma photon with average energy of 0.38 MeV (max 1.06 Mev) is released in the process

Question 20

Ir-192 HVL and TVL

Answer 20

3 mm HVL
12 mm TVL

Question 21

Ir-192 gamma constant

Answer 21

108 uGym2/GBqh

Question 22

Co-60 radiation

Answer 22

beta decay, releasing 1.17 and 1.33 MeV photons

Question 23

how is Co-60 produced

Answer 23

by bombarding a target material, either cobalt-59 or nickel-60, with neutrons

Question 24

Co-60 1/2 life

Answer 24

5 years

Question 25

Co-60 HVL and TVL

Answer 25

11 mm and 40 mm Pb

Question 26

Co-60 gamma

Answer 26

309 uGym2/GBqh

Question 27

Cs-137 radiation

Answer 27

beta decay
0.66 MeV

Question 28

Cs-137 half life

Answer 28

30 years

Question 29

Cs-137 HVL and TVL

Answer 29

6.5 mm and 21 mm Pb

Question 30

how is Cs-137 made?

Answer 30

nuclear fission product

Question 31

Cs-137 gamma

Answer 31

77.3 uGym2/GBqh

Question 32

I-125 dose rate constant

Answer 32

0.88 and 0.93 /cm2

Question 33

Ir-192 dose rate constant

Answer 33

1.12/cm2

Question 34

Pd-103 dose rate constant

Answer 34

0.74/cm2

Question 35

Ir-192 air kerma strength

Answer 35

29000-41000 U for HDR

Question 36

Pd-103 air kerma strength

Answer 36

2.6 U

Question 37

Co-60 air kerma strength

Answer 37

15000-18000 U