A state in 16O* at an excitation energy of 9.63 MeV has a broad width = 510 keV. It is...

A state in ¹⁶O* at an excitation energy of 9.63 MeV has a broad width = 510 keV. It is indicated in Figure 13.6 by hatch marks. In the excitation functions for ¹²C(α, γ)¹²C and ¹²C(α, γ)16O shown in Figure 13.6, broad peaks reflect this state. (a) At what laboratory bombarding energy K_α will the resonance be observed? (The actual peak may be shifted slightly because of interference effects.) (b) What is the approximate lifetime of this excited state?