Universal liquid-hydrogen source of polarized cold and ultracold neutrons at the VVR-M reactor of the Leningrad Institute of Nuclear Physics
Altarev I. S., Borovikova N. V., Bulkin A. P., Vesna V. A., Garusov E. A., Grigor'eva L. A., Egorov A. I., Erozolimskii B. G., Erykalov A. N., Zakharov A. A., Ivanov S. N., Kezerashvili V. Ya., Kirsanov S. G., Kolomenskii E. A., Konoplev K. A., Kuznetsov I. A., Lobashev V. M., Maslov N. F., Mityukhlyaev V. A., Okunev I. S., Peskov B. G., Petrov Yu. V., Pikulik P. G., Pirozhkov N. A., Porsev G. D., Serebrov A. P., Sobolev Yu. V., Tal'daev R. R., Shustov V. A., Shchevetov A. F.
Record-high intensities and flux densities of polarized cold neutrons [3 Χ 1010 n/s and 6 X 108 n/(s · cm2) ] and a record-high intensity of ultracold neutrons (5 X 105 n/s) with a flux density of 6 Χ 103 n/{$-cm2) have been attained for the velocity range VxfVy9Vz < 7.8 m/s at an intermediate-power reactor. The degree of polarization of the neutron beam is 90 ± 5%. The yields of ultracold and cold neutrons have been studied with deuterium and hydrogen-deuterium mixtures.