Energy separation of the doublet of intrinsic states at the ground state of 229Th
Abstract
It has been known from some time that the intrinsic state labeled by the asymptotic quantum numbers (3/2+[631] lies quite close (<0.1 keV) to the (5/2+[633] ground state of 229Th. Using the energies of selected γ rays emitted following the α decay of 233U, we have obtained a value of 1+/-4 eV for the energy separation of these two intrinsic states.
- Publication:
-
Physical Review Letters
- Pub Date:
- January 1990
- DOI:
- 10.1103/PhysRevLett.64.271
- Bibcode:
- 1990PhRvL..64..271R
- Keywords:
-
- 23.20.Lv;
- 27.90.+b;
- gamma transitions and level energies;
- 220<
- =A