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Novopol'tsev, M.I.; Pokotilovskij, Yu.N.
Joint Inst. for Nuclear Research, Dubna (USSR). Lab. of Neutron Physics1985
Joint Inst. for Nuclear Research, Dubna (USSR). Lab. of Neutron Physics1985
AbstractAbstract
[en] The activation experiments with ultracold neutrons (UCN) are described. The UCN flux density was measured by means of activation of foils from manganese-nickel alloy. The activity was measured in a low-background installation with 4πβ-proportional counter. The sensitivity of the method is approximately 10sup(-2) n/cm2 x s. The method of ''black'' detector has been developed for absolute measurement of the UCN flux densities. The coefficient of absorption of UCN at subbarrier reflection from copper surface has been measured by activation method. The discrepancy with theory of reflection from the jump of complex potential is <30 percent and is explained by roughness of the surface without additional hypotheses
Original Title
Aktivatsionnye ehksperimenty s ul'trakholodnymi nejtronami. Izmerenie koehffitsienta pogloshcheniya netronov pri podbar'ernom otrazhenii ot poverkhnosti medi
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Source
1985; 11 p; 28 refs.
Record Type
Report
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Country of publication
ACTIVATION ANALYSIS, BARYON REACTIONS, BARYONS, CHEMICAL ANALYSIS, COLD NEUTRONS, COPPER ISOTOPES, DETECTION, DIMENSIONS, ELEMENTARY PARTICLES, FERMIONS, HADRON REACTIONS, HADRONS, INTERMEDIATE MASS NUCLEI, ISOTOPES, MEASURING INSTRUMENTS, NEUTRONS, NONDESTRUCTIVE ANALYSIS, NUCLEAR REACTIONS, NUCLEI, NUCLEON REACTIONS, NUCLEONS, ODD-EVEN NUCLEI, RADIATION DETECTION, RADIATION DETECTORS, RADIATION FLUX, SPECTRA, STABLE ISOTOPES
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