Open AccessTheoretical description and numerical computation of the relaxation of multi-spin system in the presence of an RF field
Author(s) -
XiQiao Feng,
Tangyan Liu,
Huang Yong-Ren
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.3054
Subject(s) - relaxation (psychology) , bloch equations , field (mathematics) , computation , spin (aerodynamics) , von neumann architecture , physics , mathematical physics , quantum mechanics , computer science , mathematics , thermodynamics , pure mathematics , algorithm , psychology , social psychology
According to the Liouville-von Neumann equation and WBR theory, a general description of relaxation of multi-spin system in the presence of an RF field is given. The relaxation equations are deduced and the theoretical computational formulas of various relaxation rates are obtained. It is almost impossible to accessthe analytical solutions of relaxation equations, so the computer program for numerical solutions is developed. By means of the program and the Bloch equations, the steady state solutions of two-spin system under various conditions are computed and these solutions are briefly discussed.