Department für Physik • Michael Sewtz Quantum Heavies From Hot Fusion to Ultracold Ions M. Block 1 , M. Drewsen 2 , S. Fritzsche 1 , D. Habs 3 , Y.T. Oganessian 4 , U. Kaldor 5 , G. Saathoff 6 , M. Sewtz 3 , and Th. Udem 6 1 GSI-Darmstadt, Germany 2 University of Aarhus, Denmark 3 LMU –München, Germany 4 FLNR-JINR,Dubna, Russia 5 Tel Aviv University, Israel 6 MPQ-Garching, Germany Joint Research Activity
Department für Physik Michael Sewtz Quantum Heavies From Hot Fusion to Ultracold Ions M. Block 1, M. Drewsen 2, S. Fritzsche 1, D. Habs 3, Y.T. Oganessian.
Mar 27, 2015
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Department für Physik • Michael Sewtz
Quantum HeaviesFrom Hot Fusion to Ultracold Ions
M. Block1, M. Drewsen2, S. Fritzsche1, D. Habs3, Y.T. Oganessian4, U. Kaldor5, G. Saathoff6, M. Sewtz3, and Th. Udem6
1GSI-Darmstadt, Germany 2University of Aarhus, Denmark
3LMU –München, Germany4FLNR-JINR,Dubna, Russia5Tel Aviv University, Israel6MPQ-Garching, Germany
Joint Research Activity
Michael Sewtz EURONS-EURISOL Town Meeting, Helsinki 17-19 September 2007
Motivation I
Folie 2
Development of a Technique for
Optical Spectroscopyat Single Ions
Quantum Heavies
as Detection Method forOptical Transitions in
Unknown Ions
Superheavy Element - Detection - Identification (Z,A) -Investigation (Optical Spectroscopy)
Environmental Applications
Quantum Logic
Michael Sewtz EURONS-EURISOL Town Meeting, Helsinki 17-19 September 2007
Motivation II
-Decay of one Nuclide
Folie 3
Quantum Heavies
Cou
nts
-Energy
3
0
SHE
SemiconducorDetector
det ~ 0.9
Problem : - Long-Lived - Stable Nuclides or - Spontaneous Fission
268Db t1/2 = 23 h267Db t1/2 = 1.2 h267Rf t1/2 = 2.3 h
Motivation II
CCD
108 Fluorescence Photons per Second and Ion 105 Photons/s on CCD
Problem : - Metastable StatesSolution :
|0>
|1> Laser InducedAbsorption and Emission
Spectroscopy Using Quantum LogicD.J. Wineland et al.,
Science 309, 749 (2005)
Buffer Gas QuenchingG. Werth,
Topical Issue of Eur. Phys. J. D,Backe, Habs, Sewtz, Türler, edts. DOI: 10.1140/epjd/e2007-00149-x
Quantum HeaviesExperimental Setup
Michael Sewtz EURONS-EURISOL Town Meeting, Helsinki 17-19 September 2007
Folie 4
Primary Beam
++SHE
++Target
RecoilSeparator
+
+
+
Buffer Gas Stopping Cell
Quantum Logic
FluorescenceSpectroscopyTrapped SHE+
60 mbarArgon
10-5 mbar 10-10mbar 10-11mbar
Differential Pumping
SympatheticCooling
++
Quantum HeaviesExperimental Method
Michael Sewtz EURONS-EURISOL Town Meeting, Helsinki 17-19 September 2007
Trap Potential
z
6S1/2
6P1/2
5D3/2
493 nm650 nm
= 83 s
= 8 ns
Ba+ for Sympathetic Cooling
12000 K 1eV
1) Sympathetic Cooling
SpectroscopyIon
LogicIon
2) Mass selective Detection
0.5 mK
A
RF-Excitationof SHE+
3) Spectroscopy
Photon RecoilDetunes Logic Ion
SHE+
Ion
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