Relaxation of the mass-asymmetry degree of freedom in heavy-ion reactions

M. A. Butler; S. S. Datta; R. T. de Souza; J. R. Huizenga; W. U. Schröder; J. Tõke; J. L. Wile

doi:10.1103/PhysRevC.34.2016

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Relaxation of the mass-asymmetry degree of freedom in heavy-ion reactions

M. A. Butler, S. S. Datta, R. T. de Souza, J. R. Huizenga, W. U. Schröder, J. Tõke, and J. L. Wile

Department of Chemistry and Nuclear Structure Research Laboratory, University of Rochester, Rochester, New York 14627

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Phys. Rev. C 34, 2016(R) – Published 1 November, 1986

DOI: https://doi.org/10.1103/PhysRevC.34.2016

Abstract

The ${}^{58}{Ni}$ + ${}^{165}{Ho}$ reaction has been studied at 5.9 and 6.5 MeV per nucleon (reverse kinematics). Coincident reaction fragments were detected with two position-sensitive parallel plate avalanche detectors. Correlations between energy, mass, and angle show that a small fraction of the events have fully relaxed kinetic energies, masses intermediate between those of the projectile (target) and symmetric fragmentation, and angular distributions with a marked forward-backward asymmetry.

References (8)

W. U. Schröder and J. R. Huizenga, in Treatise on Heavy-Ion Science, edited by D. Allan Bromley (Plenum, New York, 1984), Vol. 2, pp. 115-726
A. D. Hoover et al., Phys. Rev. C 25, 256 (1982)
J. Tõke et al., Nucl. Phys. A440, 327 (1985)
T. Døssing and J. Randrup, Nucl. Phys. A433, 215 (1985) ibid.A433, 280 (1985) Phys. Lett. 155B, 333 (1985)
K. Lützenkirken et al., Nucl. Phys. A452, 351 (1986)
J. P. Bondorf, J. R. Huizenga, M. I. Sobel, and D. Sperber, Phys. Rev. C 11, 1265 (1975) W. U. Schröder et al., ibid. 16, 623 (1977)
S. Bjørnholm, Nucl. Phys. A447, 117C (1986)
J. Randrup, Nucl. Phys. A327, 490 (1979) ibid.A383, 468 (1982) H. Feldmeier and H. Spangenberger, ibid. A428, 223C (1984) ibid.A435, 229 (1985)

[c1] W. U. Schröder and J. R. Huizenga, in Treatise on Heavy-Ion Science, edited by D. Allan Bromley (Plenum, New York, 1984), Vol. 2, pp. 115-726

[c2] A. D. Hoover et al., Phys. Rev. C 25, 256 (1982)

[c3] J. Tõke et al., Nucl. Phys. A440, 327 (1985)

[c4] T. Døssing and J. Randrup, Nucl. Phys. A433, 215 (1985) ibid.A433, 280 (1985) Phys. Lett. 155B, 333 (1985)

[c5] K. Lützenkirken et al., Nucl. Phys. A452, 351 (1986)

[c6] J. P. Bondorf, J. R. Huizenga, M. I. Sobel, and D. Sperber, Phys. Rev. C 11, 1265 (1975) W. U. Schröder et al., ibid. 16, 623 (1977)

[c7] S. Bjørnholm, Nucl. Phys. A447, 117C (1986)

[c8] J. Randrup, Nucl. Phys. A327, 490 (1979) ibid.A383, 468 (1982) H. Feldmeier and H. Spangenberger, ibid. A428, 223C (1984) ibid.A435, 229 (1985)

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Relaxation of the mass-asymmetry degree of freedom in heavy-ion reactions

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