DEVICE FOR MEASUREMENT OF GAMMA RESONANCE FORM OF LONG-LIVED NUCLEAR ISOMERS Russian patent published in 2009 - IPC G01N23/06 G21K1/12 

FIELD: physics.

SUBSTANCE: invention refers to nuclear technology area, to devices for measurement of the form of gamma radiation microspectrum which are emitted at disintegration of long-lived isomeasured conditions of nuclei, such as an isomeasured ¹⁰⁹Ag nucleus condition with 88.03 keV energy and average life time of 57 seconds. In the device for measurement of the form of a gamma resonance of long-lived nuclear isomers, beams of gamma-ray quantums from a source are directed to detectors in parallel to a platform plane. The source is placed in the cryostat, conditioned in a temperature providing Moessbauer conditions and executed in the form of a metal plate from the atoms with the nuclei having an investigated isomeasured condition, with the atoms of a parent nuclide input into it. The cryostat and detectors are installed on a platform. Intensity of gamma lines of basic and auxiliary non-resonant gamma sources is measured depending on a slope of beams concerning horizontal plane. The inclination is carried out by platform turn. In each angular position the measurement can be spent at a natural direction of Earth magnetic field and at the component of a terrestrial magnetic field compensated by an additional magnetic field perpendicular to a direction of registered gamma beams. The pair of Helmholtz rings located coaxially to the cryostat serves for terrestrial field compensation.

EFFECT: invention allows raising resolving power Moessbauer spectrometers.