رشد تک بلورهای MnCl2.4H2O و تعیین درصد ناخالصی 59Co در بلور با استفاده از ایزوتوپهای رادیواکتیو 54Mn؛ 60Co و 57Co و روش NMRON

In this paper, MnCl,.4H,O crystals with monoclinic structure, for the study of magnetic hyperfine field in magnetic crystal at low temperature, have been grown. To study the effect of impurities on T, (spin-lattice relaxation time), crystals with different percent of "Co impurities, from saturated mixed solution of MnCl,.4H,O and CoCl,.6H,O at temperature of 30Q'K, have been grown. The percent of cobalt impurities in the solution and crystal was determined by using the radioactive isotopes of "Mn, 6OCO and "Co as probes. The result indicated that the ratio of "Co/"Mn was about 6.2% which has a good correspondence with the results of the NMRON spectrum of 54Mn in low temperatures (T<lOOmK).