1

186

W (28.6%)

74

+ n

g

+

T

1/2

-

b

187

W

74

= 23.72h

187

Re*

75

~

T

1/2

<

1ms

g

187

Re

75

479.53 keV (21.8%)

685.77 keV (27.3%)

618.36 keV (6.3%)

{

(T

1/2

10

= 4.35 10 y)

2

55

Mn (100%)

25

+ n

T

1/2

-

b

= 2.58h

56

Fe*

26

~

T

1/2

<

6ps

g

846.77 keV (100%)

2113.12 keV (14.3%)

1810.77 keV (27.2%)

{

(stable)

56

Fe

26

3

27

Al (100%)

13

+ n

T

1/2

-

b

= 2.24m

~

T

1/2

<

1ps

g

1778.96 keV (100%)

(stable)

28

Al

13

56

Mn

25

28

Al

13

28

Si*

14

28

Si

14

g

+

g

+

0

2

4

6

8

10

12

14

16

60

560

1060

1560

2060

2560

energy [keV]

n

u

m

b

e

r

o

f

p

h

o

to

n

s

s

-1

c

m

-2

846.74

1810.77

2113.05

1778.96

1377.63

anihilation

peak

479.53

618.36

685.77

2

1

1

4

2

1

2

3

energia [MeV]

2

3

4

1

Clinac - 2300

-1

-2

li

z

b

a

o

to

ó

w

m

s

c

f

n

c