Safonov AI, Vasilyev SA, Kharitonov AA, Boldarev ST, Lukashevich II, Jaakkola S. Adsorption and two-body recombination of atomic hydrogen on 3He-4He mixture films.
PHYSICAL REVIEW LETTERS 2001;
86:3356-3359. [PMID:
11327969 DOI:
10.1103/physrevlett.86.3356]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2000] [Indexed: 05/23/2023]
Abstract
We present the first systematic measurement of the binding energy E(a) of hydrogen atoms to the surface of saturated 3He- 4He mixture films at temperatures 70-400 mK. E(a) is found to decrease almost linearly from 1.14(1) K down to 0.39(1) K, when the population of the ground surface state of 3He grows from zero to 6x10(14) cm(-2), yielding the value 1.2(1)x10(-15) K cm(2) for the mean-field parameter of H- 3He interaction in 2D. Measuring by ESR the rate constants K(aa) and K(ab) for second-order recombination of hydrogen atoms in hyperfine states a and b, we find the ratio K(ab)/K(aa) to be independent of the 3He content and to grow with temperature.
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