The Effect of Super-Radiance on the C-A Transition of the Excimer Molecule XeCl* at 352 nm Excited Only by 235U Fission Fragments
American Journal of Modern Physics
Volume 8, Issue 2, March 2019, Pages: 14-17
Received: Apr. 8, 2019;
Accepted: May 30, 2019;
Published: Jul. 11, 2019
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Aleksey Iustinovich Mis’kevich, Department of Laser Physics, National Research Nuclear University MEPHI, Moscow, Russia
Jin Bo Guo, School of Physical Science and Technology, Tianjin Polytechnic University, Tianjin, PR of China
Yurii Alekseevich Duyzhov, Department of Cosmic Energy System, Institute of Physics and Power Engineering, Obninsk, Russia
Anton Viktorovich Podkopaev, Department of Cosmic Energy System, Institute of Physics and Power Engineering, Obninsk, Russia
The work is devoted to the study of spectral, temporal and generation characteristics of plasma generated in dense gas mixtures by the products of neutron nuclear reaction 235U(n, f). This plasma differs in its properties from the discharge plasma, as has the track structure and low temperature of electrons, and the presence in gas mixtures of electronegative gas can become without electrons. On the basis of such nuclear-excited plasma excimer gas lasers with the nuclear pumping, carrying out direct transformation of nuclear energy to the laser radiation UV range of lengths of waves, can be created. We found out high efficiency of formation of excimer molecules of XeCl* in dense (~ 760 Торр) Ar - Xe - CCl 4 of gas mixture with low (~ 1015 mol/cм3) concentration of CCl4 at the nuclear pumping. Here we report the first clear observation of super-radiance at 352 nm on C-A transition of excimer molecule XeCl* excited solely by nuclear pumping Ar-Xe-CCl4 gas mixture at a pressure of 760 Torr with a low concentration of CCl4 (0.15Torr). The mixture was excited by products of neutron nuclear reaction 235U(n,f) pumped at a rate of 2kW/cm3. A laser cell with a length of 100cm was placed inside an optical resonator tuned at 352 nm. Super-radiance had a very sharp increase and low neutron threshold (about 2÷4.1014 neutron/cm2. s) when we used the tuning resonator at 352 nm wavelength with 10.8% reflection of output and 62.1% reflection of back spherical mirrors, and super-radiance disappeared if the laser output mirror was replaced by a quartz window.
Aleksey Iustinovich Mis’kevich,
Jin Bo Guo,
Yurii Alekseevich Duyzhov,
Anton Viktorovich Podkopaev,
The Effect of Super-Radiance on the C-A Transition of the Excimer Molecule XeCl* at 352 nm Excited Only by 235U Fission Fragments, American Journal of Modern Physics.
Vol. 8, No. 2,
2019, pp. 14-17.
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