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Investigation of γ-ray fold distributions in N ≤ 82 Gd, Eu and Sm nuclei: Observation of a double-humped fold distribution

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Abstract

Cross-sections and γ-ray fold distributions have been measured for the 97Mo+51V, 100Mo+48Ti and 114Cd+36S reactions at energies of 238, 215 and 182 MeV of the 51V, 48Ti and 36S projectiles, respectively. For the 97Mo(51V, α2n 142Eu reaction channel a double-humped fold distribution has been observed. This fold distribution can only be understand if an incomplete-fusion reaction mechanism associated with the α-particle emission is assumed. The 97Mo(51V, α n 143Eu reaction channel represents an incomplete-fusion reaction channel as well and its single-humped fold distribution can be described on the same footing as that of the α2n channel. The fold distributions associated with xn and pxn channels can be explained assuming complete-fusion reactions. For the calculations in terms of an incomplete-fusion reaction mechanism a narrow angular momentum window, ranging from ≈ 68 to 82ℏ has been assumed for the 97Mo(51V, αn and α2n reaction channels. The complete-fusion reaction mechanism is considered to be negligible in this angular-momentum range.

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Authors and Affiliations

  1. iThemba Laboratory for Accelerator Based Sciences, P.O. Box 722, 7129, Somerset West, South Africa

    R. M. Lieder & E. O. Lieder

  2. Institut für Kernphysik, Forschungszentrum Jülich, D-52425, Jülich, Germany

    R. M. Lieder, A. A. Pasternak, E. O. Lieder & W. Gast

  3. A.F. Ioffe Physical Technical Institute RAS, RU-194021, St. Petersbourg, Russia

    A. A. Pasternak & E. O. Lieder

  4. Institut für Naturwissenschaftlich-Technische Trendanalysen, Fraunhofer Gesellschaft e.V., D-53879, Euskirchen, Germany

    E. O. Lieder

  5. Laboratori Nazionali di Legnaro, INFN, I-35020, Legnaro, Italy

    G. de Angelis

  6. Dipartimento di Fisica dell’Università, INFN, Sezione di Padova, I-35131, Padova, Italy

    D. Bazzacco

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  1. R. M. Lieder
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Correspondence to R. M. Lieder.

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Communicated by C. Signorini

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Lieder, R.M., Pasternak, A.A., Lieder, E.O. et al. Investigation of γ-ray fold distributions in N ≤ 82 Gd, Eu and Sm nuclei: Observation of a double-humped fold distribution. Eur. Phys. J. A 47, 115 (2011). https://doi.org/10.1140/epja/i2011-11115-3

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  • DOI: https://doi.org/10.1140/epja/i2011-11115-3

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