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Atomic and Nuclear Physics
Consider the following particle decays:
Also indicate for each case:
Allowed or forbidden (if forbidden give reason)
Type of interaction (strong, weak, or electromagnetic).
π^-+p→π^0+n
π^0→γ+γ+γ
π^0→γ+γ
π^+→μ^++v_μ
π^+→μ^++v ̅_μ
p+p ̅→Λ^0+Λ^0
p+p ̅→γ
Also indicate for each case:
Allowed or forbidden (if forbidden give reason)
Type of interaction (strong, weak, or electromagnetic).
π^-+p→π^0+n
π^0→γ+γ+γ
π^0→γ+γ
π^+→μ^++v_μ
π^+→μ^++v ̅_μ
p+p ̅→Λ^0+Λ^0
p+p ̅→γ
Atomic and Nuclear Physics
What is the activity of a 0.05 mol sample of barium-137? (to 2 s.f and in Bq)
Atomic and Nuclear Physics
What is the wavelength of the photon emitted by a hydrogen atom when a bound electron in the n = 3 state makes the transition to the n = 2 state? (to 2 s.f in nm)
Atomic and Nuclear Physics
the semi-empirical formula provides an excellent representation of the mass systematic of nuclei. show explicitly for fixed A, M has the minimum value. is there any evidence for 'valley of beta stability' what is the stablest nucleus with A=16
Atomic and Nuclear Physics
A radioactive material A (decay constant ΠA) decays into a material B (decay constant ΠB) and then into C(decay constant ΠC) which is also radioactive. Determine the amount of C remaining after a time t.
Atomic and Nuclear Physics
Light passes from medium A into medium B.
As it does so the wavelength of the light is reduced by 22.0%.
What is the ratio of the refractive indices nB/nA? (to 3 s.f)
As it does so the wavelength of the light is reduced by 22.0%.
What is the ratio of the refractive indices nB/nA? (to 3 s.f)
Atomic and Nuclear Physics
Explain why the spectroscopic term symbol for Boron in the ground state is 2P3/2.
Atomic and Nuclear Physics
A 2.0 mm thick sheet of shielding allows 80% of incident gamma radiation to pass through it.
How many layers of this shielding are required such that less than 30% of incident gamma rays to pass through all layers? (to 2 s.f)
How many layers of this shielding are required such that less than 30% of incident gamma rays to pass through all layers? (to 2 s.f)
Atomic and Nuclear Physics
. The Bethe-Weizsacker formula (Semi empirical mass formula) provides an excellent
representation of the mass systematics of nuclei. Show explicitly that, for fixed A, M(A, Z) has a
minimum value. Is there evidence for the "valley of beta stability"? What is the stablest nucleus
with A = 16? What about A = 208?
representation of the mass systematics of nuclei. Show explicitly that, for fixed A, M(A, Z) has a
minimum value. Is there evidence for the "valley of beta stability"? What is the stablest nucleus
with A = 16? What about A = 208?
Atomic and Nuclear Physics
The B − meson is the lightest particle consisting of a b quark and u antiquark. Which type of
interaction causes its decay. Describe with explanation its decay chain.
interaction causes its decay. Describe with explanation its decay chain.
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