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2006 | 4 | 2 | 223-240
Tytuł artykułu

The possibility of time resonance (explosion) phenomena in high-energy nuclear reactions

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
This study shows that the exponential decrease of the energy spectra, accompanied by slight oscillations, with final-fragment energy in high-energy nuclear reaction, and independent of fragments, targets, projectiles, and projectile energies, can be explained under some conditions in the range of strongly overlapping compound resonances by a new phenomenon of time resonances (explosions). These time resonances (explosions) correspond to the formation of a few highly-excited, non-exponentially decaying nuclear clots (partial compound nuclei consisting of certain small groups of target and projectile nucleons). The proposed approach is an alternative way of analyzing experimental data compared with the majority of known descriptions (for instance, fireball models). This is a new and more general version of the time-evolution approach compared with the Izumo-Araseki time compound-nucleus model.
Wydawca

Czasopismo
Rocznik
Tom
4
Numer
2
Strony
223-240
Opis fizyczny
Daty
wydano
2006-06-01
online
2006-06-01
Twórcy
  • Institute for Nuclear Research, National Ukrainian Academy of Sciences, Kiev, 03028, Ukraine, olkhovsk@kinr.kiev.ua
  • Institute for Nuclear Research, National Ukrainian Academy of Sciences, Kiev, 03028, Ukraine
  • Institute for Nuclear Research, National Ukrainian Academy of Sciences, Kiev, 03028, Ukraine
Bibliografia
  • [1] J. Gosset, H. Gutbrod, W. Meyer, A. Poskanzer, A. Sandoval, R. Stock and G. Westfall: “Central Collisions of Relativistic Heavy Ions”, Phys. Rev. C, Vol. 16, (1977), pp. 629–657. http://dx.doi.org/10.1103/PhysRevC.16.629[Crossref]
  • [2] G. Westfall, R. Sextro, A. Poskanzer, A. Zebelman, G. Butler and E Hyde: “Energy spectra of nuclear fragments produced by high energy protons”, Phys. Rev. C, Vol. 17, (1978), pp. 1368–1381. http://dx.doi.org/10.1103/PhysRevC.17.1368[Crossref]
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  • [4] S. Kaufman and E. Steinberg: “Cross-section measurements of nuclides formed by the reaction of 0.20–6.0 GeV protons with 197Au”, Phys. Rev. C, Vol. 22, (1980), pp. 167–178. http://dx.doi.org/10.1103/PhysRevC.22.167[Crossref]
  • [5] D. Fortney and N. Porile: “Angular distributions of Sc fragments from the interaction of 238U with 0.8–400 GeV protons”, Phys. Rev. C, Vol. 21, (1980), pp. 2511–2518 http://dx.doi.org/10.1103/PhysRevC.21.2511
  • [6] A. Sandoval, H. Gutbrod, W. Meyer, R. Stock and Ch. Lukner: “Spectra of p, d, and t from relativistic nuclear collisions”, Phys. Rev. C, Vol. 21, (1980), pp. 1321–1343. http://dx.doi.org/10.1103/PhysRevC.21.1321[Crossref]
  • [7] P. Danielewicz and Q. Pan: “Blast of light fragments from central heavy-ion collisions”, Phys. Rev. C, Vol. 46, (1992), pp. 2002–2011. http://dx.doi.org/10.1103/PhysRevC.46.2002[Crossref]
  • [8] Ko Izumo and H. Araseki: “Time Compound Nucleus for High Energy Nuclear Reactions”, Prog. Theor. Phys., Vol. 69, (1983), pp. 158–170. http://dx.doi.org/10.1143/PTP.69.158[Crossref]
  • [9] R. Alba, R. Coniglione, A. Del Zoppo, C. Agodi, G. Bellia, P. Finocchiaro, K. Loukachine et al.: “On the origin of fast proton emission in intermediate energy heavy ion collisions”, Phys. Lett. B, Vol. 322, (1994), pp. 38–42. http://dx.doi.org/10.1016/0370-2693(94)90488-X[Crossref]
  • [10] K. Chen, Z. Fraenkel, G. Friedlander, J. Grover, J. Miller and Y. Shimamoto: “VEGAS: A Monte Carlo Simulation of Intranuclear Cascades”, Phys. Rev., Vol. 166, (1968), pp. 949–967. http://dx.doi.org/10.1103/PhysRev.166.949[Crossref]
  • [11] A.A. Amsden, A.S. Goldhaber, F.H. Harlow and J. Rayford: “Relativistic two-fluid model of nucleus-nucleus collisions”, Phys. Rev. C, Vol. 17, (1978), pp. 2080–2096. http://dx.doi.org/10.1103/PhysRevC.17.2080[Crossref]
  • [12] T. Goto, Sh. Naka and K. Yamaguchi: “The Time as an Observable in Quantum Mechanics”, Progr. Theor. Phys., Vol. 64(1), (1980), pp. 1–17. http://dx.doi.org/10.1143/PTP.64.1[Crossref]
  • [13] V.S. Olkhovsky: “Investigation of nuclear reactions and decays by analysis of their duration”, Soviet J. Particles and Nucleus, Vol. 15(2), (1984), pp. 130–148; V.S. Olkhovsky: “Nonstationary characteristics in study of nuclear reaction mechanism and kinetics and compound-nucleus properties”, Nukleonika, Vol. 35, (1990), pp. 99–144.
  • [14] V. Lyuboshitz: “On collision duration in the presence of strong overlapping resonance levels”, Phys. Lett. B, Vol. 72, (1977), pp. 41–44. http://dx.doi.org/10.1016/0370-2693(77)90058-2[Crossref]
  • [15] A. D’Arrigo, G. Giardina, A. Taccone, G. Hassani and V. Olkhovsky: “A way to evaluate the level density, total width and compound-nucleus decay functions in the range of unresolved resonances”, Int. J. Mod. Phys. E, Vol. 2, (1993), pp. 809–820. http://dx.doi.org/10.1142/S0218301393000352[Crossref]
  • [16] V. Olkhovsky: “On a time-dependent description of collisions”, Nuovo Cimento, Vol. A4, (1971), pp. 605–610. [Crossref]
  • [17] V. Olkhovsky and A. Zaichenko: “Analytical properties and the resonant structure of the S-matrix in case of noncentral and parity-violating potentials”, Nuovo Cimento, Vol. A63, (1981), pp. 155–170. [Crossref]
  • [18] L. Rosenfeld: “Theory of nuclear reactions: VIII. Time evolution of the scattering process”, Nucl. Phys., Vol. 70, (1965), pp. 1–27. http://dx.doi.org/10.1016/0029-5582(65)90222-1[Crossref]
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  • [20] N.V. Eremin, V.S. Olkhovsky and S.A. Omelchenko: “Temporal description of interference phenomena in Nuclear Reactions with Two-Particle Channels”, Mod. Phys. Lett. A, Vol. 9, (1994), pp. 2849–2856. http://dx.doi.org/10.1142/S0217732394002690[Crossref]
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  • [22] M. Simonius: “Overlapping resonances and unitarity of the scattering matrix”, Nucl. Phys. A, Vol. 218, (1974), pp. 53–60. http://dx.doi.org/10.1016/0375-9474(74)90019-0[Crossref]
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11534-006-0008-z
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