Münster 2017 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 61: Structure and Dynamics of Nuclei X

HK 61.3: Vortrag

Freitag, 31. März 2017, 14:30–14:45, F 33

Decay Spectroscopy at SHIP in the neutron deficient neptunium region — •Andrew Mistry for the SHIP decay spectroscopy collaboration — Helmholtz Institute Mainz, Germany — GSI Helmholtzzentrum, Darmstadt, Germany

In the heavy element region of the nuclear landscape, a variety of theoretical models predict location of the enhanced shell stabilization region above the spherical closure at 208Pb (Z=82, N=126) [1]. Whilst current understanding of the spherical shell closures up to 208Pb is well established, experimental knowledge on the evolution of the shell closures towards the proton dripline remains limited due to low production cross sections and short half-lives. To this end, recent efforts have focused on the weakening effect of the N=126 shell closure in the neutron deficient region with Z>91 [2], employing increasingly advanced experimental apparatus. The focal plane detection system at SHIP [3] was employed online at GSI, Darmstadt with the two-fold purpose of performing an advanced commissioning of the setup and subsequently to produce neutron deficient neptunium isotopes (Z=93). The setup comprises a double sided silicon strip implantation detector surrounded by 4 single sided silicon strip detectors, with a Ge clover detector located downstream. Digital signal processing was employed. Results will be presented from the production of neptunium isotopes.

[1] R-D. Herzberg, P.T. Greenlees Progress in Particle and Nuclear Physics 61, 674 (2008)

[2] J. Khugyagbaatar et. al. PRL 115, 242502 (2015)

[3] A.K. Mistry, GSI Annual report 2015 p.109 (2016)

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