Fission of heavy hypernuclei formed in antiproton annihilation.
نویسندگان
چکیده
~ l Warsaw University, Bialystok Branch, PL 15 48$ -Bi-alystok, Poland DRFMC, Centre d'Etudes Nucleaires de Grenoble, Boite Postale 85X, 880/1 Grenoble, France Continuous Electron Beam Accelerator Facility, Newport News, Uirginia 85'6'06' Gesellschaft fur Schwerionenforschumg Darmstadt, Postfach 1105/1, D 6100 D-armstadt, Germany ~Centre de Spectrometric Nucleaire et de Spectrometric de Masse, Institut National de Physique Nucleaire et de Physique des Particles, Centre National de la Recherche Scientifique, F 01/05-Orsay, France (Received 5 August 1992)
منابع مشابه
THE LIFETIME OF THE Λ - HYPERON BOUND IN HYPERNUCLEI PRODUCED BY p+U COLLISIONS
The nonmesonic decay of the Λ–hyperon has been investigated by observation of delayed fission from heavy hypernuclei produced in proton – U collisions at Tp=1.9 GeV. The lifetime of heavy hypernuclei with masses A≈220 obtained in the present work, i.e. τΛ = [138± 6(stat.)± 17(syst.)] ps, is the most accurate result for heavy hypernuclei produced in proton and antiproton induced collisions on a ...
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متن کاملFission of heavy Λ hypernuclei with the Skyrme-Hartree-Fock approach
Fission-related phenomena of heavy Λ hypernuclei are discussed with the constraint Skyrme-Hartree-Fock+BCS (SHF+BCS) method, in which a similar Skyrme-type interaction is employed also for the interaction between a Λ particle and a nucleon. Assuming that the Λ particle adiabatically follows the fission motion, we discuss the fission barrier height of 239 ΛU. We find that the fission barrier hei...
متن کاملStrangeness production in antiproton-nucleus annihilation
Abstract. The results of the microscopic transport calculations of p̄-nucleus interactions within a GiBUU model are presented. The dominating mechanism of hyperon production is the strangeness exchange processes K̄N → Yπ and K̄N → ΞK. The calculated rapidity spectra of Ξ hyperons are significantly shifted to forward rapidities with respect to the spectra of S = −1 hyperons. We argue that this shif...
متن کاملNonmesonic decay of the Λ-hyperon in hypernuclei produced by p+Au collisions
The lifetime of the Λ-hyperon for the nonmesonic decay ΛN → NN has been determined by a measurement at COSY Jülich of the delayed fission of heavy hypernuclei produced in proton Au collisions at Tp=1.9 GeV. It is found that heavy hypernuclei with mass numbers A≈(180±5) and atomic numbers Z≈(74±2) fission with a lifetime τΛ=130 ± 13(stat.) ± 15(syst.) ps. This value together with the results obt...
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ورودعنوان ژورنال:
- Physical review. C, Nuclear physics
دوره 47 5 شماره
صفحات -
تاریخ انتشار 1993