Barrier distributions derived from quasielastic excitation functions for the35Cl+105,106,1

Abstract

Quasielastic excitation functions for the 35 Clϩ 105,106,110 Pd systems were measured at a backward angle and at near barrier energies. Experimental fusion barrier distributions were derived from these measured cross sections and compared with simplified coupled-channel calculations. Coupling of inelastic excitations up to second order were insufficient to explain the data. The inclusion of specific transfer reaction channels improved the fits to these fusion barrier distributions.

Surface diffuseness parameter for systems withZPZT≃780

“…From the representation of the fusion barrier distributions reported in Refs. [7,8], we can experimentally establish an upper limit for the deep sub-barrier energy region at around 88 and 82 MeV for the systems having 35 Cl and 32 S as projectile onto palladium targets, respectively. The experimental data were compared with optical model calculations following the prescription delineated in previous paragraphs.…”

“…The absolute cross sections reported in Refs. [7,8] were determined through an expression in which the normalization factor is given by the ratio between the solid angles of two detectors (see Eq. (3.1) in [7]).…”

“…[7,8] were determined through an expression in which the normalization factor is given by the ratio between the solid angles of two detectors (see Eq. (3.1) in [7]). This ratio was experimentally obtained from gold target irradiations at energies well below the Coulomb barrier where the elastic cross section follows the Rutherford formula.…”

“…The purpose of this Brief Report is to contribute to the understanding of the role played by the surface diffuseness parameter in heavy-ion reactions through the analysis of available * Electronic address: capurro@tandar.cnea.gov.ar quasielastic data for reactions involving spherical nuclei whose Z P Z T product is near 780. We have analyzed quasielastic scattering cross sections measured at backward angles for the 35 Cl + 105,106,110 Pd and 32 S + 110 Pd systems at energies well below the Coulomb barrier [7,8]. All these palladium-isotope targets exhibit vibrational characteristics.…”

Fusion barrier distribution derived from quasielastic excitation functions inB11,C12Sahu1, Saxena2, Nayak3 et al. 2006Phys. Rev. C5000View full textAdd to dashboardCite

“…Therefore, another widely used complementary approach to extract the representation of barrier structure is by the measurement of quasielastic excitation function at the backward angles. This representation can be obtained from the first derivative of the ratio between quasielastic [σ qel (E)] and Rutherford [σ R (E)] excitation function with respect to energy [11,[20][21][22][23]:…”