Power densities for two-step gamma-ray transitions from isomeric states

Details Power densities for two-step gamma-ray transitions from isomeric states Power densities for two-step gamma-ray transitions from isomeric states

1999-08-19

arxiv.org/abs/nucl-ex/9908011v1

Phys.Rev.C58:2560-2562,1998

Physics

Nuclear Physics

Nuclear Experiment

9 pages, 1 eps figure, 1 table

Scientific paper

10.1103/PhysRevC.58.2560

We have calculated the incident photon power density P_2 for which the two-step induced emission rate from an isomeric nucleus becomes equal to the natural isomeric decay rate. We have analyzed two-step transitions for isomeric nuclei with a half-life greater than 10 min, for which there is an intermediate state of known energy, spin and half-life, for which the intermediate state is connected by a known gamma-ray transition to the isomeric state and to at least another intermediate state, and for which the relative intensities of the transitions to lower states are known. For the isomeric nucleus 166m-Ho, which has a 1200 y isomeric state at 5.98 keV, we have found a value of P_2=6.3 x 10^7 W cm^{-2}, the intermediate state being the 263.8 keV level. We have found power densities P_2 of the order of 10^{10} W cm^{-2} for several other isomeric nuclei.

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