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Isomer triggering via nuclear excitation by electron capture

Aug, 2007

4 pages

Published in:

Phys.Rev.Lett. 99 (2007) 172502

e-Print:

0708.0194 [nucl-th]

DOI:

10.1103/PhysRevLett.99.172502

View in:

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Abstract: (arXiv)

Triggering of nuclear isomeric states via coupling to the atomic shells in the process of nuclear excitation by electron capture (NEEC) is studied. NEEC occurring in bare or highly-charged ions can excite the nucleus from the isomeric state to a triggering level that subsequently decays directly or in cascades to the ground state. We present total cross sections for NEEC followed by the decay of the isomeric state considering experimentally confirmed low-lying triggering levels. Reaction rates of NEEC isomer triggering are calculated assuming realistic experimental parameters for ion beams and electron targets in storage rings. A comparison with other isomer triggering mechanisms such as bremsstrahlung photons and nuclear excitation by electron transition shows that, among these, NEEC is the most efficient nuclear excitation mechanisms of the isomeric state.

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Figures(0)

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