Cardamone D M, Stafford C A, Barrett B R
Physics Department, P.O. Box 210081, University of Arizona, Tucson, Arizona 85721, USA.
Phys Rev Lett. 2003 Sep 5;91(10):102502. doi: 10.1103/PhysRevLett.91.102502. Epub 2003 Sep 3.
A new expression for the branching ratio for the decay via the E1 process in the normal-deformed band of superdeformed nuclei is given within a simple two-level model. Using this expression, the spreading or tunneling width gamma (downward arrow) for superdeformed decay can be expressed entirely in terms of experimentally known quantities. We show how to determine the tunneling matrix element V from the measured value of gamma (downward arrow) and a statistical model of the energy levels. The accuracy of the two-level approximation is verified by considering the effects of the other normal-deformed states.
在一个简单的两能级模型中，给出了超形变核正常形变带中通过E1过程衰变的分支比的新表达式。利用这个表达式，超形变衰变的展宽或隧穿宽度γ（向下箭头）可以完全用实验已知量来表示。我们展示了如何根据γ（向下箭头）的测量值和能级的统计模型来确定隧穿矩阵元V。通过考虑其他正常形变态的影响，验证了两能级近似的准确性。
