Darmstadt 2016 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 12: Structure and Dynamics of Nuclei III

HK 12.5: Vortrag

Montag, 14. März 2016, 17:45–18:00, S1/01 A03

Decay Spectroscopy at SHIP with a new Focal Plane Detector System — •Andrew. K. Mistry for the SHIP Decay Spectroscopy collaboration — Helmholtz Institute Mainz

Decay spectroscopy of the heaviest elements remains a crucial tool in nuclear structure physics in testing a variety of theoretical models predicting the next proton and neutron shell stabilization region beyond 208Pb [1]. Experimental measurements of alpha-decay energies and half-lives, ordering and configurations of ground state and excited levels, and the determination of high-K isomers provide necessary information in constraining these models. To this end, a new focal plane detection system for decay spectroscopy has been designed and developed at GSI for the SHIP separator [2]. It consists of a double sided silicon strip implantation detector surrounded by 4 single sided silicon strip detectors on each side in a box formation with a compact design, allowing for good germanium solid angle coverage for gamma ray detection. The data acquisition is based on FEBEX flash ADC modules, developed at GSI [3], for digital signal processing enables an almost deadtime free system. Recently, a commissioning run was successfully performed using the device. In my talk I will present recent highlights of decay spectroscopy at SHIP, and demonstrate results from measurements assessing the performance of the new setup.

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

[2] D. Ackermann et.al., GSI Annual report (2015)

[3] N. Kurz, J. Hoffmann et al., GSI Scientific Report 2011, p. 252-3;