Spontaneous Fission HalfLife of Am^{242m}
Abstract
The spontaneousfission halflife for the oddodd nucleus Am^{242m} has been measured by a promptneutron fissionfragment coincidence method to be (9.5+/3.5)×10^{11} years. A correlation of experimental spontaneousfission halflife data for nuclei of all classes was found to be _{10}τ(βZ^{2}A)δM= 9.268(Z^{2}A)+374.0, where β takes the values 42.22, 40.67, and 40.40 for eveneven, oddA, and oddodd nuclides, respectively, τ is the spontaneousfission halflife in years, and δM is the mass difference in millimassunits (mmu) between the values obtained from Green's smoothly varying mass formula and the experimentally measured values.
 Publication:

Physical Review
 Pub Date:
 March 1967
 DOI:
 10.1103/PhysRev.155.1309
 Bibcode:
 1967PhRv..155.1309C