Microscopic effects in fragment mass distribution in fusion-fission reactions of light projectiles with heavy targets

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dc.creatorGhosh, T. K.
dc.creatorPal, S.
dc.creatorGolda, K. S.
dc.creatorBhattacharya, P.
dc.date2005-02-12
dc.date.accessioned2026-07-07T05:37:33Z
dc.date.available2026-07-07T05:37:33Z
dc.descriptionMicroscopic effects in fragment mass distributions in fusion-fission reactions of light projectiles (C, O and F) on deformed thorium and spherical bismuth targets in near and below Coulomb barrier energies are investigated. Precisely measured mass distribution shows a sudden anomalous increase in variances of mass distributions ($σ_{m}^2$) near Coulomb barrier energies for all three projectiles with deformed thorium target, in contrast to a smooth variation of $σ_{m}^2$ with energy for spherical bismuth target. Macroscopic effects of change in mass flow or prolonged mass equilibration time can not explain the observed variation in $σ_{m}^2$ with energy. Microscopic effects due to change in entrance channel shape compactness for projectiles hitting the polar region of prolate thorium target is postulated to reach a almost symmetric saddle without complete fusion for events of anomalous fragment widths. Quantitative estimates of mass widths mixed for the two processes explains the observed variation of $σ_{m}^2$ with excitation energy.
dc.description11 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/nucl-ex/0502013
dc.identifierhttp://arxiv.org/abs/nucl-ex/0502013
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/81324
dc.subjectNuclear Experiment
dc.titleMicroscopic effects in fragment mass distribution in fusion-fission reactions of light projectiles with heavy targets
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