Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 27: Structure and Dynamics of Nuclei VI
HK 27.4: Vortrag
Dienstag, 15. März 2016, 17:45–18:00, S1/01 A03
Isotope shift measurements in the D2-transition of neutron-rich Ca-isotopes using the ROC technique at COLLAPS — •Christian Gorges for the COLLAPS collaboration — Institut für Kernphysik, TU Darmstadt, Germany
Calcium isotopes have been of great interest in nuclear physics for decades because of its two stable doubly magic nuclei within the isotopic chain. Recently, this has been revived by experiments revealing possible new shell closures at N = 32 and N= 34 [1]. The 4s 2S1/2 → 4p 2P3/2 transition (D2) is sensitive to the quadrupole moments of the odd isotopes and is therefore the preferred transition for studies of short-lived isotopes as they were recently reported up to 52Ca+ [2] using optical fluorescence detection. To extend the investigations further towards 54Ca a more sensitive approach is required. Hence, we have adapted the COLLAPS collinear laser beamline at ISOLDE for the application of β-decay detection after optical pumping and state-selective neutralization (ROC) [3].
[1] D. Steppenbeck et al., Nature 502, 207 (2013)
[2] R. F. Garcia Ruiz et al., Phys. Rev. C 91, 041304(R) (2015)
[3] L. Vermeeren et al., Phys. Rev. Lett 68, 1679 (1992)