Dynamical effects in the heavy ion fusion reactions of the compound nucleus {sup 80}Sr{sup *} via charged particle evaporation

Journal Article · Thu Jul 01 00:00:00 EDT 2004 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.70.017601· OSTI ID:20695622

Kaur, J; Kumar, A; Kumar, Ajay; Singh, G; Govil, I M ^[1]; Datta, S K ^[2]

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1. Department of Physics, Panjab University, Chandigarh-160014 (India)
2. Nuclear Science Centre, New Delhi-110067 (India)

The alpha-particle spectra and the proton spectra at different laboratory angles from the fusion reactions {sup 16}O+{sup 64}Zn at 95 Mev and {sup 32}S+{sup 48}Ti at 125 MeV were measured. Both systems have zero channel spin and lead to the compound nucleus {sup 80}Sr{sup *} with the same value of l{sub max}=43({Dirac_h}/2{pi}). The observed spectra from the asymmetric reaction {sup 16}O+{sup 64}Zn reaction can be reproduced with the statistical model calculations using rotating liquid drop model values of moment of inertia and transmission coefficients for spherical nuclei. However, the charged particle spectra in case of the symmetric {sup 32}S+{sup 48}Ti reaction are not in agreement with the predictions of the statistical model. In order to explain the experimental spectra for the {sup 32}S+{sup 48}Ti reaction, the analysis was done using the dynamical model of Feldmeier et al. [Rep. Prog. Phys. 50, 915 (1987)]. This analysis shows that the effective l{sub max} value for fusion to take place in the case of the symmetric system is lowered to 30({Dirac_h}/2{pi}). The statistical model calculations for the dynamical model predicted the l{sub max} value reproduced the observed spectra reasonably well indicating entrance channel effects on the decay of the compound nucleus.

• OSTI ID: 20695622
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 70, Issue 1; Other Information: DOI: 10.1103/PhysRevC.70.017601; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
ASYMMETRY
COMPOUND NUCLEI
EVAPORATION MODEL
HEAVY ION FUSION REACTIONS
LIQUID DROP MODEL
MEV RANGE
MOMENT OF INERTIA
NUCLEAR DECAY
OXYGEN 16 REACTIONS
PROTON SPECTRA
SPIN
STATISTICAL MODELS
STRONTIUM 80
SULFUR 32 REACTIONS
TITANIUM 48 TARGET
ZINC 64 TARGET