Patent ID: 8433380
Filing Date: 2013-04-30
Classification: G21K

Abstract:
1. A Mössbauer spectroscopy system for applying magnetic field at cryogenic temperature using refrigerator, comprising: a Mössbauer driving unit configured to be supplied with electric power from a power supply section to generate a periodic signal; a Mössbauer velocity transducer configured to receive the periodic signal from the Mössbauer driving unit, the Mössbauer velocity transducer having a function in which when a sawtooth wave is formed at a start point where the Mössbauer velocity transducer receives the periodic signal from the Mössbauer driving unit, the sawtooth wave is converted to a parabolic wave by an integration circuit and then is amplified to be made large to obtain a strong current signal, and a function in which when the amplified signal is applied to a driving coil of the Mössbauer velocity transducer, a copper shaft positioned at the center of the driving coil periodically performs a uniformly accelerated motion by a magnetic field vertically acting on the driving oil but complete uniform acceleration does not occur, and thus the non-uniform motion is offset by negatively feedbacking an electrical signal induced to an induction coil arranged on the cooper shaft to be opposite to the driving coil; a gamma ray source attached to one end of the copper shaft within the Mössbauer velocity transducer and configured to emit gamma rays; a sample (i.e., absorber) configured to absorb the gamma rays emitted from the gamma ray source; a superconducting magnet configured to generate a magnetic field for application to the sample; a refrigerator configured to cool the temperature of the sample to the cryogenic temperature; a proportional counter (i.e., detector) configured to count electrical signals transmitted through the sample by resonant absorption; an amplifier configured to amplify the electrical signals outputted from the proportional counter; a data acquisition module configured to receive the amplified signals from the amplifier and store data of the proportional counter by channels through a Mössbauer program; and a computer configured to display data including the changes in the temperature and magnetic field stored in the data acquisition module in the form of a spectrum through a Mössbauer data analysis program.