| More

Decay of 160Er* in 16O + 144Nd and 64Ni + 96Zr Fusion Reactions

Views: 18 Downloads: 10
N. G. Nicolis, J. L. Barreto, D. G. Sarantites, R. J. Charity, L. G. Sobotka, D. W. Stracener, D. C. Hensley, J. R. Beene, C. Baktash, M. L. Halbert, M. Thoennessen
N. G. Nicolis, J. L. Barreto, D. G. Sarantites, R. J. Charity, L. G. Sobotka, D. W. Stracener, D. C. Hensley, J. R. Beene, C. Baktash, M. L. Halbert, M. Thoennessen

Abstract


The population of evaporation residue entry states in the decay of the compound nucleus 160Er*(54 MeV) is investigated in a cross-bombardment employing the reactions 160 + 144Nd and 64Ni + 96Zr. Evaporation residue cross sections and entry state 7-ray fold distributions of the dominant exit channels were obtained for each reaction, using a 4π 7-ray detection system. An entrance-channel dependence of the 7-ray fold distributions of the xn products is observed. This effect is described successfully by the statistical model making use of compound nucleus angular momentum distributions obtained with a fusion model that provides a good description of the bombarding energy dependence of fusion data for both reactions. In accordance with recent findings on the decay of 164Yb*, it is suggested that the observed differences in the population of the dominant exit channels originate from the primary spin distributions rather than a possible dependence of the compound nucleus decay on the formation mode.


Full Text:

PDF

References


M. Beckerman, Rep. Prog. Phys. 51, 1047 (1988).

R. Vandenbosch, Annu. Rev. Nucl. Part. Sci. 42, 447 (1992).

D. E. DiGregorio and R. G. Stokstad, Phys. Rev. C 43, 265 (1991).

A. Charlop et al., Phys. Rev. C49, R1235 (1994).

Β. Haas et al., Phys. Rev. Lett. 54, 398 (1985).

C.H. Dasso and S. Landowne, Phys. Rev. C 32, 1094 (1985).

W. Kühn et al., Phys. Rev. Lett. 62, 1103 (1989).

W. Kühn et al., Phys. Rev. Lett. 51, 1858(1983).

D.J. Love et al., Phys. Rev. Lett. 57, 551 (1986).

A. Ruckelshausen et al., Phys. Rev. Lett. 56, 2356 (1986).

J.L. Barreto et al., Phys. Rev. C 48, 2881 (1993).

N.G. Nicolis and D.G. Sarantites, Phys. Rev. C 48, 2895 (1993).

J.L. Baretto et al., Phys. Rev. C51, 2584(1995).

G. Duchène et al., Phys. Rev. C 47, 2043 (1993).

AM. Stefanini et al., Nucl. Phys. A548, 453 (1992).

D.W. Stracener et al., Nucl. Inst. Meth. A294, 485(1990).

M. Jääskeläinen et al., Nucl. Inst. Meth. 204, 385(1983).

D.G. Sarantites et al., Phys. Rev. C 18, 774(1978).

L. Westerberg et al., Phys. Rev. C 18, 796(1978).

R.A. Dayras et al., Phys. Rev. Lett. 42, 697(1979).

M. L. Halbert and J. R. Beene, in Proceedings of the XIV Symposium on Nuclear Physics, Cuernavaca, Mexico, January 7-10, 1991, ed. M.E. Brandan, World Scientific Publishers, 1991.

O. Akyüz and A. Winther, in Proceedings of the Enrico Fermi International School of Physics, 1979, edited by R.A. Broglia, C.H. Dasso, and R Ricci (North-Holland, Amsterdam, 1981), p. 492.

V. S. Ramamurthy et al., Phys. Rev. C 41, 2702 (1990).

A. K. Mohanty et al., Phys. Rev. C46, 2012 (1992).

A. K. Mohanty et al., Phys. Rev. Lett. 65, 1096 (1990).

N. G. Nicolis, D. G Sarantites and J. R. Beene. Computer code EVAP (unpublished); evolved from the code PACE by A. Gavron, Phys. Rev. C21, 230(1980).

H. Eeldmeier, Rep. Prog. Phys. 50, 915 (1987).

M. Thoennessen et al., Phys. Rev. Lett. 70, 4055(1993).




DOI: http://dx.doi.org/10.12681/hnps.2410

Refbacks

  • There are currently no refbacks.


Copyright (c) 2019 N. G. Nicolis, J. L. Barreto, D. G. Sarantites, R. J. Charity, L. G. Sobotka, D. W. Stracener, D. C. Hensley, J. R. Beene, C. Baktash, M. L. Halbert, M. Thoennessen

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.