Lecture 4: Nuclear Reactions and their Yields

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20 Terms

1
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What is the energy that must go into the kinetic energy of products in order to satisfy the conservation of momentum?

(Ez/Ea)=ma/(ma+mX)

2
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What is the formula for threshold energy?

Ethres=|Q|(1+(ma/mX))

3
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What is the formula for rate of reactions?

R=N0σI

4
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Why do resonances occur?

Energetic overlap with product’s excited nuclear states.

5
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What should you consider when choosing a nuclear reaction?

rxn excitation function, available particles/beams, energy requirements, target material requirements, undesired alternative reactions

6
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Formula for activity related to initial number of atoms?

A(t)=N0σI(1-e-λtirrad)

7
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<p>Which colored square represents a (n, γ) reaction?</p>

Which colored square represents a (n, γ) reaction?

Purple

8
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<p>Which colored square represents a (n, p) reaction?</p>

Which colored square represents a (n, p) reaction?

Pink

9
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<p>Which colored square represents a (γ, p) reaction?</p>

Which colored square represents a (γ, p) reaction?

Green

10
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<p>Which colored square represents a (n, α) reaction?</p>

Which colored square represents a (n, α) reaction?

Orange

11
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<p>Which colored square represents a (γ,n) reaction?</p>

Which colored square represents a (γ,n) reaction?

Blue

12
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<p>Which colored square represents a (α, 4n) reaction?</p>

Which colored square represents a (α, 4n) reaction?

Orange

13
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<p>Which colored square represents a (α, n) reaction?</p>

Which colored square represents a (α, n) reaction?

Pink

14
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<p>Which colored square represents a (p,n) reaction?</p>

Which colored square represents a (p,n) reaction?

Green

15
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<p>Which colored square represents a (α, pn) reaction?</p>

Which colored square represents a (α, pn) reaction?

Purple

16
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<p>Which colored square represents a (p, α) reaction?</p>

Which colored square represents a (p, α) reaction?

Blue

17
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What is the physical yield?

APhys/(It)

18
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What is the saturation yield?

AEOSB/I

19
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Give the formula for APhys(t)

APhys(t)=N0σIλt

20
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Give the formula for AEOSB(t)

AEOSB(t)=N0σI