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Дата последнего поиска статьи во внешних источниках: 4 февраля 2014 г.
Аннотация:We consider collisional effects on the transitions between HFS states of (\bar{p}3He+) in the presence of microwave radiation. Cross sections and rates of collisional HFS transition, density shifts and broadening of M1 spectral lines are calculated within the approach developed previously for (\bar{p}4He+) . The values averaged over thermal motion are used in the quantum master equation for the density matrix of HFS states in the microwave field. At the target density 3 × 10^20 cm − 3 and T = 6 K, partial rates of the single spin-flip transition in (\bar{p}3He+) are ∼1 · 10^6 s − 1. Effective relaxation rates by considering the kinetics are approximately twice more. At the same conditions collisional shifts of the M1 spectral lines are ≤ 4 kHz, collisional broadening of the lines is ≃ 0.5 MHz. The total width of the line J − − + → J + − + at t d = 350 ns is 2.4 MHz allowing for collisional and Fourier broadenings. Maximum MW resonance signal in 3He is about 0.5 of that one in 4He.