Orateur
Description
Recent calculations have suggested that the region of strong octupole correlations in the
light actinides extends to higher Z values than previously thought, with neutron-deficient
plutonium (Z = 94) and curium (Z = 96) nuclei predicted to have large β 3 values in their
ground states [1, 2]. In order to test the predictions, an experiment has been performed
to study the structure of neutron-deficient plutonium (Z = 94) isotopes. The experiment
was carried out using the AGATA γ-ray spectrometer [3, 4] together with the PRISMA
[5] magnetic spectrometer and the DANTE channel-plate array [6]. The main aim of the
experiment was to identify excited states in the isotopes 232 Pu and 234 Pu. The nuclei
of interest were populated using multi-nucleon transfer reactions induced with a beam
of 112 Sn incident on a thin 238 U target. Reaction channels were selected by identifying
the beam-like reaction products behind the focal plane of PRISMA and, where possible,
detecting target-like products in the DANTE detectors. Analysis of the data is ongoing
and the preliminary results will be presented.
This work is supported by Science and Technology Facilities Council, UK, under grants
numbered ST/P005101/1 and ST/V001124/1.
References
[1] Y. Cao et al., Phys. Rev. C. 102, 024311 (2020).
[2] K. Nomura et al., Phys. Rev. C. 103, 044311 (2021).
[3] S. Akkoyun et al., Nucl. Instrum. Meth. 668, 26 (2012).
[4] J. J. Valiente-Dobón et al., Nucl. Instrum. Meth. A1049, 168040 (2023).
[5] A. M. Stefanini et al., Nucl. Phys. A701, 217 (2002).
[6] G. de Angelis, AIP Conf. Proc. 1609, 71-76 (2014).
