Yigang Yang

3 Questions 6 Answers 0 Followers

Questions related from Yigang Yang

Qeustion: Low energy neutron's bound scattering length?

The low energy neutron's scattering cross section is σs, when the target nucleus could be deemed as bound. However, when the target nucleus is unbound, the scattering cross section is...

21 March 2023 6,008 2 View

Why does the neutron elastic scattering cross section increase with decreased energy?

In the eV~keV energy, the neutron elastic scattering cross section is usually constant (if no resonance) which is determined by the potenial scattering. But, when the neutron energy goes to cold...

17 August 2016 3,209 8 View

Why orbital angular momentum and spin momentum of photons cannot sum to zero to meet the demand of 0-0 gamma decay?

There is no 0-0 gamma decay because the photon must carry at least 1hbar (its spin) of angular momentum. My question is: Why the orbital angular momentum (L) and spin momentum (S) of the photon...

13 January 2015 9,438 2 View