The energy of a proton is 1.0 mev below the top of a 1.2-mev-high energy barrier that is 6.8 fm wide. what is the probability that the proton will tunnel through the barrier? (1 ev = 1.60 × 10⁻¹⁹ j, m proton = 1.67 × 10⁻²⁷ kg, ℏ = 1.055 × 10⁻³⁴ j · s, h = 6.626 × 10⁻³⁴ j · s)
a.7.5%
b.14%
c.11%
d.9.1%