-
1
-
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85190570355
-
-
Note that throughout this article we shall discuss only ortho-Ps and, for brevity, we shall refer to this simply as Ps
-
Note that throughout this article we shall discuss only ortho-Ps and, for brevity, we shall refer to this simply as Ps.
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2
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Note that for a particle diffusing in one dimension with an exponentially distributed path length between scattering events, the diffusion coefficient is given by D = v¯λ, where λ is themean free path. For hopping in one dimension from pore to pore with a fixed path length A, D = 1/2 v¯A,.
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It is not strictly accurate to refer to thermal Ps in the sample we discuss here; the small pore size means that Ps cannot cool to an energy that is lower than the Ps confinement energy in the pores (see Refs. [16-18]). However, once Ps has reached this minimum energy it will have a constant diffusion coefficient and so may be considered to be "thermal" for the present purposes
-
It is not strictly accurate to refer to thermal Ps in the sample we discuss here; the small pore size means that Ps cannot cool to an energy that is lower than the Ps confinement energy in the pores (see Refs. [16-18]). However, once Ps has reached this minimum energy it will have a constant diffusion coefficient and so may be considered to be "thermal" for the present purposes.
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One of the disadvantages of using a high-voltage buncher is that there is a minimum beam energy one can use. In this case it was ~1 keV
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One of the disadvantages of using a high-voltage buncher is that there is a minimum beam energy one can use. In this case it was ~1 keV.
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