Biomedical Engineering Reference
In-Depth Information
(b)
What is the wavelength of the barium K
α
X ray emitted
when an L-shell electron makes a transition to the K shell?
(c)
What is the value of the internal-conversion coefficient?
30.
(a)
Calculate the
Q
value for K orbital-electron capture by the
37
18
Ar nucleus, neglecting the electron binding energy.
(b)
Repeat (a), including the binding energy, 3.20 keV, of the
K-shell electron in argon.
(c)
What becomes of the energy released as a result of this
reaction?
31.
What is the maximum possible positron energy in the decay of
35
18
Ar?
32.
Explain the origins of the radiations listed in Appendix D for
85
39
Y. Draw the decay scheme.
33.
The nuclide
6
30
Zn decays by electron capture (98.5%) and by
positron emission (1.5%).
(a)
Calculate the
Q
value for both modes of decay.
(b)
Draw the decay scheme for
65
Zn.
(c)
What are the physical processes responsible for each of the
major radiations listed in Appendix D?
(d)
Estimate the binding energy of a K-shell electron in copper.
Does
26
13
Al decay to the ground state of its daughter
2
12
Mg?
34.
Show that
5
26
Fe, which decays by electron capture, cannot decay
by positron emission.
35.
The isotope
12
53
IcandecaybyEC,
β
-
,and
β
+
transitions.
36.
(a)
Calculate the
Q
values for the three modes of decay to the
ground states of the daughter nuclei.
(b)
Draw the decay scheme.
What kinds of radiation can one expect from a
126
I source?
(c)
3.11
Answers
7.49%
6
Li, 92.51%
7
Li
2.
28.
0.106 eV
4.
6.26 MeV
29.
(a)
0.624 MeV and
0.656 MeV
9.
-24.303
MeV
15.
235.0439 AMU
(b)
0.388 Å
16.
0.782 MeV
(c)
0.118
20.
27 keV
31.
4.94 MeV
