Selecting cold 2n transfer in $^{\bf 162}$ Dy($^{\bf 116}$Sn,$^{\bf 118}$Sn)$^{\bf 160}$Dy

T. Härtlein; H. Bauer; D. Pansegrau; D. Schwalm

doi:doi:10.1007/s100500050202

EPJ

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2024 Impact factor 2.8

Hadrons and Nuclei

Eur. Phys. J. A 4, 41-49

Selecting cold 2n transfer in $^{\bf 162}$ Dy( $^{\bf 116}$ Sn, $^{\bf 118}$ Sn) $^{\bf 160}$ Dy

T. Härtlein - H. Bauer - D. Pansegrau - D. Schwalm

Max-Planck-Institut für Kernphysik, D-69117 Heidelberg, Germany

Received: 4 September 1998 Communicated by B. Povh

Abstract
Cold 2n transfer has been studied using the reaction ¹⁶²Dy(¹¹⁶Sn,¹¹⁸Sn)¹⁶⁰Dy at energies in the vicinity of the Coulomb barrier. The experiment was performed at the Heidelberg-Darmstadt Crystal Ball spectrometer which was extended by 6 Compton suppressed Ge-detectors. It is demonstrated, that the direct population of intrinsically cold states in the deformed ¹⁶⁰Dy transfer product can be selected by identifying and suppressing excitations to states above the yrast line using the Crystal Ball. The probability for populating yrast states in the deformed ¹⁶⁰Dy nuclei in a 2n transfer reaction increases from 7 % at grazing collisions up to $\approx$ 50 % at large impact parameters, while the probability for populating the ground state in the spherical 2n transfer product ¹¹⁸Sn stays about constant at $\approx$ 45 % for all measured impact parameters.