STUDY OF NUCLEAR PHYSICS USING BRUTE FORCE LOW-TEMPERATURE NUCLEAR POLARIZATION

bnt -force NMR-ON (BF-NMRON) is an attractive measuring g-factors without the knowledgeof hyperfine interaction and hyperfine anomaly. The samples of D175 D1SeFe, D190 D1NbCu，D190, D1NbNb，D196 D1TcNb和D1101m D1RhCu were prepared by recoil implantation into host metals （2μm）使用50MeV和75MeV alpha- beams. Cooling down of the sample to low temperature about 10 mK wasperformed with a D13 . D1He/ D14 . D1H dilution refrigerator. The vertical polarization field wasprovided by an Nb D23 D2Sn superconducting solenoid with 12t maximum field at 4.2K. Themanufacturer's computed homogeneity is 5x10关于D1-4关于D1 in 1cm d.s.v. The hyperfine field ofD175 D1SeFe was determined to be 67.9(7)T by measuring the resonances at the external magneticfield of 0.2, 2 and 6T.We have succeeded in measuring BF-NMRON for i D190 i D1NbCu, i D190 i D1NbNb，D196 D1TcNb and D1101m D1RhCu. The resonance frequencies of D190 D1NbCu and D190 D1NbNbat 12t are 56.448(2) MHz and 56.57(1) MHz，respectively. The resonance widths are 21(1) kHz and 49(3) kHz. The resonance frequency of伊D1101m伊D1RhCu at 12t is 110.8775(3) MHz. The width is 17(1) kHz. The relaxation time was alsomeasured. To measure the absolute value of the magnetic field and the linearity of the fieldstrength vs. the electric current the resonances of the well-known D1110m D1AgAg by areactor were measured at various external field between 12t and 2t . The resonance width at 12t is26 kHz. With the known magnetic moments and the field correction the Knight shifts ofD190 D1NbCu, D190 D1NbNb， D196 D1TcNb和D1101m D1RhCu were determined

Brute-force NMR-ON (BF-NMRON) is an attractive method for measuring g-factors without the knowledge of hyperfine interaction and hyperfine anomaly. The samples of ィイD175ィエD1SeFe, ィイD190ィエD1NbCu, ィイD190ィエD1NbNb, ィイD196ィエD1TcNb and ィイD1101mィエD1RhCu were prepared by recoil implantation into host metals (2μm) using 50MeV and 75MeV alpha- beams. Cooling down of the sample to low temperature about 10 mK was performed with a ィイD13ィエD1He/ィイD14ィエD1H dilution refrigerator. The vertical polarization field was provided by an NbィイD23ィエD2Sn superconducting solenoid with 12T maximum field at 4.2K. The manufacturer's computed homogeneity is 5x10ィイD1-4ィエD1 in 1 cm d.s.v. The hyperfine field of ィイD175ィエD1SeFe was determined to be 67.9(7)T by measuring the resonances at the external magnetic field of 0.2, 2 and 6T.We have succeeded in measuring BF-NMRON for ィイD190ィエD1NbCu, ィイD190ィエD1NbNb, ィイD196ィエD1TcNb and ィイD1101mィエD1RhCu. The resonance frequencies of ィイD190ィエD1NbCu and ィイD190ィエD1NbNb at 12T are 56.448(2) MHz and 56.57(1) MHz, respectively. The resonance widths are 21(1) kHz and 49(3) kHz. The resonance frequency of ィイD1101mィエD1RhCu at 12T is 110.8775(3) MHz. The width is 17(1) kHz. The relaxation time was also measured. To measure the absolute value of the magnetic field and the linearity of the field strength vs. the electric current the resonances of the well-known ィイD1110mィエD1AgAg made by a reactor were measured at various external field between 12T and 2T. The resonance width at 12T is 26(2) kHz. With the known magnetic moments and the field correction the Knight shifts of ィイD190ィエD1NbCu, ィイD190ィエD1NbNb, ィイD196ィエD1TcNb and ィイD1101mィエD1RhCu were determined.