Naslov
Mechanisms of double photoionization and the properties of the ground state wave function of Helium

Autori
Surić, Tihomir ; Pratt, R.H. ; Drukarev, E.G.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Abstracts of Contributed papers, 16th International conference on Atomic Phyiscs / Baylis, W.E. and Drake, G.W.F. - Windsor : University of Windsor, 1998, 21-218

Skup
16th International Conference on Atomic Physics (ICAP 16)

Mjesto i datum
Windsor, Kanada, 03.08.1998. - 07.08.1998

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Sažetak
Two mechanisms, shake--off and quasi--free absorption, suffice to describe the ratio $R_{P}$ of double to single ionization of Helium in photoeffect at high X--ray energies 3--100 keV, where it is not constant but exhibits a linear risecite{amusia75,drukarev95,drukarev95a}, egin{equation} R_{P}=R_{P}^{s.o}+C_{Z}frac{omegahbar}{mc^{2}} label{petrue}. end{equation} Here $R_{P}^{s.o}$ is the constant shake--off contribution while the second term is the quasi--free contribution at these energies. (In the case of He $R_{P}^{s.o}=0.0168$, $C_{2}=0.03$.) We wish to show that these two mechanisms, shake--off and quasi--free absorption, which suffice to describe the high energy behavior of the total cross-section for double photoionization of helium, can be treated in a similar way. Both mechanisms can be understood in terms of the high momentum behavior of the Fourier transform of the initial state wave function.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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