Prospects for Plasma De-Excitation of 186mRe Nuclear Isomer
https://doi.org/10.56304/S2079562920060329
Abstract
In the paper is discussed the prospects of studying the stimulated de-excitation of the nuclear isomers (SDENI) 186m1Re in a plasma with an electron temperature θe of the order of the energy ΔE of the trigger transition, this transition transfers the isomeric nucleus to a higher level, from which rapid decay into the ground state of the nucleus is possible. Recently, stimulated de-excitation of the 186m1Re isomer was found in a laser plasma with a temperature of θe ~ 1 keV and a lifetime of about 0.3 ns. However, the probability PSDENI of the stimulated de-excitation of the isomer was very small, about 10–5%. In order to increase the probability SDENI, it is proposed to use instead the laser plasma the plasma of a high-current electric discharge with a temperature of θe ~ 1 keV. In particular, it is proposed to use the plasma of the electric explosion of conductors, the lifetime of such plasma can be two orders of magnitude longer than the lifetime of the laser plasma. To select the plasma parameters for the most effective stimulation of 186m1Re isomers de-excitation, a simple formula was derived to estimate the probability PSDENI depending on the plasma parameters. In order to increase the probability PSDENI, it is also suggested to irradiate the plasma with photons of the frequency resonant to the trigger transition, and a mode of multiple repetitive high-current electric discharges in a plasma containing isomeric nuclei is proposed. It is noted that the accumulated experimental and theoretical results allows already now to start developing an energy source based on the 186m1Re isomers.
About the Author
V. V. Koltsov
JSC Khlopin Radium Institute
Russian Federation
Russian Federation
Saint-Petersburg, 194021
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Review
For citations:
Koltsov V.V. Prospects for Plasma De-Excitation of 186mRe Nuclear Isomer. Nuclear Physics and Engineering. 2021;12(2):84-90. (In Russ.) https://doi.org/10.56304/S2079562920060329
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