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Titolo:
Positronic water, Ps(2)O
Autore:
Jiang, N; Schrader, DM;
Indirizzi:
Marquette Univ, Dept Chem, Milwaukee, WI 53201 USA Marquette Univ Milwaukee WI USA 53201 Dept Chem, Milwaukee, WI 53201 USA
Titolo Testata:
PHYSICAL REVIEW LETTERS
fascicolo: 23, volume: 81, anno: 1998,
pagine: 5113 - 5116
SICI:
0031-9007(199812)81:23<5113:PWP>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
QUANTUM MONTE-CARLO; GROUND-STATE; ANNIHILATION; ELECTRONS; ENERGIES; BEAMS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Jiang, N Marquette Univ, Dept Chem, POB 1881, Milwaukee, WI 53201 USA Marquette Univ POB 1881 Milwaukee WI USA 53201 ukee, WI 53201 USA
Citazione:
N. Jiang e D.M. Schrader, "Positronic water, Ps(2)O", PHYS REV L, 81(23), 1998, pp. 5113-5116

Abstract

We demonstrate the chemical stability of a compound containing two positrons, Ps(2)O, which may be considered an extreme isotopic variant of ordinarywater. We introduce a dynamical determination of the step length into the diffusion quantum Monte Carlo method, and find that Ps(2)O is more stable than its lowest dissociation threshold, PsO + Ps, by 1.27 +/- 0.08 eV. We estimate its annihilation rate to be 4.6 ns(-1). This paper is the first demonstration of the stability of a two-positron compound since Wheeler's work on diatomic positronium, Ps(2) [Ann. N.Y. Acad. Sci. 48, 219 (1946)]. [S0031-9007(98)07861-2].

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Documento generato il 05/04/20 alle ore 19:37:50