This study considers a principal possibility of creating a nuclear light source of the vacuum ultra violet(VUV) range based on the ^(229)Th nucleus.This nuclear light source can help solve two main problems—excitatio...This study considers a principal possibility of creating a nuclear light source of the vacuum ultra violet(VUV) range based on the ^(229)Th nucleus.This nuclear light source can help solve two main problems—excitation of the low-lying^(229m)Th isomer and precision measurement of the nuclear isomeric transition energy.The thorium nuclear light source is based on the nuclei implanted in a thin dielectric film with a large bandgap.While passing an electric current through the sample,the^(229)Th nuclei are excited to the low energy isomeric state 3/2^(+)(8.19±0.12eV) through the process of inelastic scattering of conduction electrons.The subsequent spontaneous decay of^(229m)Th is followed by the emission of γ quanta in the VUV range.The luminosity of the thorium nuclear light source is approximately 10^(5)photons/s per 1 A of current,per 1 ng of^(229)Th.The suggested scheme to obtain γ radiation from the^(229m)Th isomer can be considered as a type of nuclear analogue of the optical radiation from the usual metal-insulator-semiconductor(MIS) junction.展开更多
基金Supported by a grant of the Russian Science Foundation (19-72-30014)。
文摘This study considers a principal possibility of creating a nuclear light source of the vacuum ultra violet(VUV) range based on the ^(229)Th nucleus.This nuclear light source can help solve two main problems—excitation of the low-lying^(229m)Th isomer and precision measurement of the nuclear isomeric transition energy.The thorium nuclear light source is based on the nuclei implanted in a thin dielectric film with a large bandgap.While passing an electric current through the sample,the^(229)Th nuclei are excited to the low energy isomeric state 3/2^(+)(8.19±0.12eV) through the process of inelastic scattering of conduction electrons.The subsequent spontaneous decay of^(229m)Th is followed by the emission of γ quanta in the VUV range.The luminosity of the thorium nuclear light source is approximately 10^(5)photons/s per 1 A of current,per 1 ng of^(229)Th.The suggested scheme to obtain γ radiation from the^(229m)Th isomer can be considered as a type of nuclear analogue of the optical radiation from the usual metal-insulator-semiconductor(MIS) junction.
