Abstract
Since the observation of a power-law behaviour in the charge distributions, characteristic of critical phenomena1, 2, in proton induced reactions at relativistic energies, the production of multiple intermediate mass fragments (IMF)6, 7, typically 3 ≤ Z ≤ 20, has been touted as a signature of the nuclear liquid-gas phase transition3, 4, 5. While this may be the case in peripheral reactions e. g. projectile or spectator breakup8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, the situation becomes less clear when one looks at more central reactions. In particular, it has been shown that the dissi-pative binary mechanism19, 20, 21, 22, 23 contributes 95% or more of the reaction cross section22, 23. Yet, as long as the sources are thermalized, it has been shown that a characteristic signature for phase coexistence can be extracted from the charge distributions24, 25. The situation is further complicated by the experimental observation of a significant contribution to the fragment yields from a third source formed between the projectile and target26, 27, 28, 29, 30, 31. Most of these observations were made using velocity plots (see for example ref. 27) which are useful in assigning a given particle to its primary source. This evidence points out the importance of dynamics in the entrance channel. Unfortunately, it tells very little about the intrinsic properties of the sources themselves. In particular, it does not disclosed the nature of the fragmentation process producing the detected “cold” IMF, i. e. at t → ∞.
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References
M.E. Fisher, Physica 3, 225 (1967).
D. Stuffer and A. Aharony, Introduction to percolation theory, 2nd Ed. (Taylor and Francis, London, 1992) pp.181.
J.E. Finn et al., Phys. Rev. Lett 49, 1321 (1982).
J.P. Siemens, Nature 305, 410 (1983).
A.D. Panagiotou et al., Phys. Rev. Lett 52, 496 (1984).
B. Borderie, Ann, de Phys. 17, 349 (1992).
L.G. Moretto and G.J. Wozniak, Ann. Rev. Nucl. Part. Sci. 43, 379 (1993).
P. Désesquelles et al., Phys. Rev. C 48, 1828 (1993).
P. Kreutz et al., Nucl. Phys. A556, 672 (1993).
M.L. Gilkes et al., Phys. Rev. Lett 73, 1590 (1994).
J. Pochodzalla et al., Phys. Rev. Lett 75, 1040 (1995).
J. Benlliure, Ph.D. thesis, University of Valencia, Spain, 1995 (unpublished).
L. Beaulieu, Ph.D. thesis, Universit’e Laval, Canada, 1996 (unpublished).
P.F. Mastinu et al, Phys. Rev. Lett. 76, 2646 (1996).
L. Beaulieu et al., Phys. Rev. C 54, R973 (1996).
A. Schüttauf et al., Nucl. Phys. A 607, 457 (1996).
J. Pochodzalla, Prog. Part. Nucl. Phys. 39, 443 (1997).
J.A. Hauger et al., Phys. Rev. C 57, 764 (1998).
B. Lott et al., Phys. Rev. Lett. 68, 3141 (1992).
B.M. Quednau et al., Phys. Lett. B309, 10 (1993).
J.F. Lecolley et al, Phys. Lett. B325, 317 (1994).
J. Péter et al., Nucl. Phys. A593, 95 (1995).
L. Beaulieu et al., Phys. Rev. Lett. 77, 462 (1996).
L. Phair et al., Phys. Rev. Lett. 75, 213 (1995).
L.G. Moretto et al., Phys. Rev. Lett. 76, 372 (1996).
C.P. Montoya et al., Phys. Rev. Lett 73, 3070 (1994).
J. Lukasik et al., Phys. Rev. C 55, 1906 (1997).
Y. Larochelle et al., Phys. Rev. C 55, 1869 (1997).
J. Toke et al., Phys. Rev. Lett. 75, 2920 (1995).
J.F. Lecolley et al., Phys. Lett. B 354, 202 (1995).
J.F. Dempsey et al., Phys. Rev. C 54, 1710 (1996).
J. Toke et al., Phys. Rev. Lett 77, 3514 (1996).
J. Toke et al., Phys. Rev. C 56, R1683 (1997).
L.G. Moretto et al., Phys. Rev. Lett. 74, 1530 (1995).
K. Tso et al., Phys. Lett. B 361, 25 (1995).
L.G. Moretto, et al., Phys. Rep. 287, 249 (1997).
L. Phair et al., Phys. Rev. Lett 77, 822 (1996).
L. Beaulieu et al., Submitted to Phys. Rev. Lett.
L.G. Moretto, et al., Phys. Rev. Lett. 71, 3935 (1993).
M.B. Tsang et al., Phys. Rev. Lett. 80, 1178 (1998)
W. Skulski et al., to appear in Proc. 13th Workshop on Nuclear Dynamics, Key West, Florida (1997).
R.T. de Souza et al., Nucl. Inst. Meth. A 311, 109 (1992).
W.C. Kehoe et al., Nucl. Inst. Meth. A 311, 258 (1992).
J.P. Bondorf et al., Phys. Rep. 257, 133 (1995).
L. Phair et al., Accepted in Phys. Rev. Lett.
N. Colonna, private communication.
L. Phair et al., to be published.
D.W. Stracener et al., Nucl. Inst. Meth. A 294, 485 (1990).
L.G. Moretto, Phys. Rev. 179, 1176 (1969).
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Beaulieu, L., Phair, L., Moretto, L.G., Wozniak, G.J. (1998). Multifragmentation at Intermediate Energy: Dynamics or Statistics?. In: Bauer, W., Ritter, HG. (eds) Advances in Nuclear Dynamics 4. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9089-4_4
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