1. Penning Trap Mass Spectrometry for Particle Physics
• Standard Model:
Conserved Vector Current (CVC) Hypothesis
Test of the Unitarity of CKM Matrix
• Is Neutrino a Majorana or Dirac Particle?:
Contributions to Search for Neutrinoless Double b-Decay/EC
• Mass of Antineutrino:
Q-Value of Tritium b-decay
Sergey Eliseev
Abteilung “Gespeicherte und gekühlte Ionen“ von Prof. Klaus Blaum
Max-Planck-Institut für Kernphysik, Heidelberg, Deutschland

2. Principle of Penning trap mass spectrometry
Detection Techniques:
◊ homogen. magnetic field +
TOF – ICR
(Time-Off-Flight Ion Cyclotron Resonance)
◊ electric quadrupole field
short-lived nuclides
simple, fast, but requires ~100 ions
FFT – ICR
(Fast Fourier Transform Ion Cyclotron Resonance)
stable nuclides
complicated, one ion is enough
K. Blaum, Phys. Rep. 425, 1-78 (2006)

3. Q-values of superallowed b-decays to check conserved-vector-current hypothesis
Vector part of weak interaction is not influenced by strong interaction
GV is a true constant
dm/m < 1·10-8
Penning traps:
Future Plans:
26Si
30S
42Ti
Ft = (8) s
66As
70Br
ISOLTRAP: 22Mg, 26Al, 34Ar, 74Rb
I. Towner & J. Hardy, Rep. Prog. Phys. 73 (2010)

4. Test of unitarity of CKM matrix
Standard Model
CKM matrix is unitary
Nuclear Physics
(Penning traps) F
Kaon-decay
B Meson-decay
Muon-decay
Experiments:
I. Towner & J. Hardy, Rep. Prog. Phys. 73 (2010)

5. Search for Neutrinoless Double b-Decay/EC
Observation of Neutrinoless Double
b-Decay/EC
• Neutrino is a Majorana Particle
• Effective mass of neutrino
2nEC
0n2EC
Q-values measured by other groups:
Qbb-values measured so far:
74Se, 112Sn, 120Te ( )E-9
no resonant enhancement
76Ge, 100Mo, 130Te, 136Xe (1 -30)E-10
G. Douysset et al., PRL 86, 4259 (2001)
Our new measurements at SHIPTRAP
(preliminary results)
S. Rahaman et al., PLB 662, 111 (2008)
M. Redshaw et al., PRL 102, (2009)
152Gd
152Sm:
M. Redshaw et al., PRL 98, (2007)
Q-B2h = (800±180) eV
164Er
164Dy:
Q-B2h > 5000 eV
Our Future Plans:
48Ca, 124Sn, 96Zr, 96Ru, 162Er, ……….

6. Determination of the 3H3He Q-value
Important parameter for a determination of the electron antineutrino rest mass
Q-value of 3H b-decay
VanDyck
THe-Trap at MPIK:
We aim for:
dQ(3T3He) = 20 meV
dm/m = 7·10-12
Q= (1.2) eV
Sz. Nagy et al., Europhys.Lett. 74, 404 (2006)