Tübingen 2003 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 2: Kernphysik/Spektroskopie I
HK 2.12: Vortrag
Montag, 17. März 2003, 19:00–19:15, A
Investigation of single-particle properties of neutron-rich Na and Mg isotopes with MINIBALL at REX-ISOLDE — •Oliver Niedermaier, Hans Boie, Jörg Fitting, Frank Köck, Martin Lauer, Uttam-Kumar Pal, Heiko Scheit, and Dirk Schwalm — Max-Planck-Institut für Kernphysik, Heidelberg
In order to study the single-particle properties of the neutron rich Na and Mg isotopes, beams of these nuclei were produced by REX-ISOLDE [1] with an energy of up to 2.3 MeV/u and intensities between 10 4 s−1 (30Mg) and 10 7 s−1 (25Na). These nuclei are of special interest due to rapid changes in nuclear structure in the vincinity of the island of deformation around 32Mg.
The investigation of the radioactive nuclei by γ spectroscopy is accomplished by choosing the neutron pick-up channel, i.e. the transfer reactions (d,p) and (9Be,8Be) in inverse kinematics, on deuterated polyethylene (0.6 - 0.9 mg/cm2) and beryllium (0.9 mg/cm2) targets, respectively.
The reaction products were observed in a double-sided silicon strip detector and the MINIBALL array [2] was used to detect the coincident deexcitation γ rays. The MINIBALL array consisted of eight cluster detectors each comprised of three sixfold-segmented HPGe detectors with an efficiency of about 10% at 1.3 MeV. A parallel plate avalanche counter (PPAC) served as a beam monitor.
First results will be presented and discussed.
[1] D. Habs et al., Nucl. Ph. A 616, 29c (1997)
[2] J. Eberth et al., Prog. Part. Nucl. Phys. 46, 389 (2001)