Nuclear Structure: Hindrance Factor Explained

[rgshankar76]

What is hindrance factor?
What does it indicate? If the Hindrance is very high? If its low?

For eg. 103Rh (39.76 keV) E3 transition has got hindrance factor of ~400.
What does this mean.

The Hindrance is calculated using

Theoretical Lambda(E3) / Exptl. Lambda (E3)
Lambda(E3) -- > E3 Transition probablity.

Theoretical value obtained frm the single particle estimates.
Weisskopf or Moszowski single particle estimates.
for E3 : 34(A^2) (E^7)

exptl : 0.693 / [(t1/2) (1+Total ICC)]
Total ICC - total conversion coefficient

 

[Astronuc]

I have seen 'hindrance factors' in reference to alpha-decay, but not gamma decay, but perhaps the idea is the same.

See - http://www.phys.jyu.fi/research/gamma/publications/ptgthesis/node26.html