This is a dedicated community where students post specific problems from Krane. You are likely to find threads where others have already asked for help on the exact problem you are working on.
A complete solution would show the integral evaluation (using the substitution r = b cos²θ or the standard Gamow formula), then plug numbers to get t_1/2 ≈ 3×10⁻⁷ s. The measured half-life of (^212)Po is 3.0×10⁻⁷ s – excellent agreement. This is a dedicated community where students post
: Applications in meson physics, particle physics, and astrophysics. Important Data for Calculations and astrophysics. Important Data for Calculations