Neutrino-related nuclear mass difference measurements with a few 10 eV uncertainty at SHIPTRAP Enrique MINAYA RAMIREZ Max-Planck-Institut für Kernphysik, Heidelberg, Germany

Tokyo, 2 nd of June 2014Enrique MINAYA RAMIREZ 163 Ho 1982 J.U. Andersen et al P.A. Baisden et al E. Laegsgaard et al Hartmann & Naumann 1986 S. Yasumi et al Hartmann & Naumann 1993 F. Bosch et al S. Yasumi et al F. Gatti et al ECHo 187 Re 1965 R.L. Brodzinski & D.C. Conway 1967 E. Huster & H. Verbeek 1992 E. Cosulich et al K. Ashktorab et al A. Alessandrello et al M. Galeazzi et al C. Arnaboldi et al. Direct measurements of Q-values of 187 Re (β - ) and 163 Ho (EC) with δQ/m ~ 2·  Required now Q-values of 187 Re (β - ) & 163 Ho (EC) Neutrino mass Experiments ECHo, HOLMES, MARE

Tokyo, 2 nd of June 2014Enrique MINAYA RAMIREZ Double   decay (  ) two-neutrino mode (2  ) neutrinoless mode (0  ) Double-electron capture (2EC) two-neutrino mode (2  2EC) neutrinoless mode (0  2EC)  ν is a Majorana particle  Conservation of total lepton number breaks  neutrino mass can be determined neutrinoless mode :  Observed T 1/2 ≈ 7∙ ∙10 25 yr  Not observed, T 1/2 > 2∙10 25 yr  Not observed, T 1/2 > yr  Not observed, T 1/2 ≈ yr Neutrino type

Tokyo, 2 nd of June 2014Enrique MINAYA RAMIREZ 0 ν 2EC  resonant enhancement of the capture rate (T 1/2 ≈ yr) Q-values of neutrinoless double-Electron Capture transitions  Search for nuclides with Δ < 1 keV  Q εε = M 1 – M 2 at 100 eV level  Precision mass measurements for neutrino physics T 1/2 (0  T 1/2 (  EC)

Tokyo, 2 nd of June 2014Enrique MINAYA RAMIREZ ion detector Measurement trap (MT) m/Δm = 10 7 Isomeric states resolved Buncher Quadrupole deflector Superconducting magnet (7T) m/Δm = 10 5 Nuclear isobars resolved Diaphragm Purification trap (PT) SHIPTRAP setup Extraction RFQ Entrance window DC cage Gas cell Beam RF funnel Extraction RFQ Entrance window DC cage Gas cell Beam RF funnel Laser ablation : Ru, Mo, Pd, Ru, Cd, Te, Sn, Ba, Ce, Sm, Nd, Gd, Dy, Er, Y, W, Hf, Re, Os Ion gun : xenon ions (gas) Off-line measurements B

Tokyo, 2 nd of June 2014Enrique MINAYA RAMIREZ εεββQ-value (keV)Publications 152 Gd  152 Sm55.70(18)S. Eliseev et al., Phys. Rev. Lett. 106, (2011) 102 Pd  102 Ru 106 Cd  106 Pd 144 Sm  144 Nd (36) (10) (87) M. Goncharov et al., Phys. Rev. C 84, (2011) 96 Ru  96 Mo 162 Er  162 Dy 168 Yb  168 Er (13) (30) (25) S. Eliseev, D. Nesterenko et al., Phys. Rev. C 83, (2011) 156 Dy  156 Gd (10)S. Eliseev, M. Goncharov et al., Phys. Rev. C 84, (R ) (2011) 164 Er  164 Dy25.07(12)S. Eliseev et al., Phys. Rev. Lett. 107 (2011) W  180 Hf143.20(27)C. Droese et al., Nucl. Phys. A 875 (2012) Xe  124 Te 130 Ba  130 Xe 136 Ce  136 Ba 124 Sn  124 Te 130 Te  130 Xe (12) (39) (29) (14) (35) D.A. Nesterenko et al., Phys. Rev. C 86, (2012) Q-values measured at SHIPTRAP

Tokyo, 2 nd of June 2014Enrique MINAYA RAMIREZ Resonant enhancement of neutrinoless double-electron capture in 152 Gd S. Eliseev et al., PRL 106, (2011) T 1/2 (0 + →0 + ) ~ / ² y

Tokyo, 2 nd of June 2014Enrique MINAYA RAMIREZ |M| = 3 for 0 + → 0 + T 1/2 (0 + →0 + ) ~ 3  / ² y Multiple-resonance phenomena in 156 Dy S. Eliseev et al., PRC 84, R (2011)

Tokyo, 2 nd of June 2014Enrique MINAYA RAMIREZ Phase Imaging Ion Cyclotron Resonance (PI-ICR) position resolution : 70 µm active diameter : 42 mm ToF (µs) x (µm) y (µm) ions Delay-Line Detector by Roentdek GmbH Position sensitive detector

Tokyo, 2 nd of June 2014Enrique MINAYA RAMIREZ Phase Imaging Ion Cyclotron Resonance (PI-ICR) ions Delay-Line Detector by Roentdek GmbH R Φ R Independent Measurements of Eigenfrequencies ν + and ν - Radial excitation Determination of the spatial distribution Radial excitation followed by a phase accumulation time

Tokyo, 2 nd of June 2014Enrique MINAYA RAMIREZ  Image ion motion  Determine phase of ion motion  Excite ions  Determine phase after evolution time S. Eliseev et al., Appl. Phys B 114 (2014) 107 Phase Imaging Ion Cyclotron Resonance (PI-ICR)

Tokyo, 2 nd of June 2014Enrique MINAYA RAMIREZ  Image ion motion  Determine phase of ion motion  Excite ions  Determine phase after evolution time Phase Imaging Ion Cyclotron Resonance (PI-ICR)  40 fold gain in resolving power  5 fold gain in precision compared to standard technique  25 faster than the Ramsey TOF-ICR ΔM shiptrap = M( 130 Xe + ) – M( 129 Xe + ) ΔM FSU - ΔM shiptrap = 690 (880) eV ΔM FSU - ΔM shiptrap = 180 (240) eV S. Eliseev et al., Phys. Rev. Lett. 110, (2013) Ramsey TOF-ICRPI-ICR

Tokyo, 2 nd of June 2014Enrique MINAYA RAMIREZ PI-ICR technique at SHIPTRAP ΔM = M( 132 Xe) - M( 131 Xe) Δ M SHIPTRAP - Δ M reference = (8 ± 35) eV δ( Δ M) SHIPTRAP = (30 stat )( 12 sys ) eV first ever measurement of mass difference of singly charged medium-heavy non-mass-doublets with a relative accuracy of 2· !!!

Tokyo, 2 nd of June 2014Enrique MINAYA RAMIREZ 163 Ho 1982 J.U. Andersen et al P.A. Baisden et al E. Laegsgaard et al Hartmann & Naumann 1986 S. Yasumi et al Hartmann & Naumann 1993 F. Bosch et al S. Yasumi et al F. Gatti et al ECHo 187 Re 1965 R.L. Brodzinski & D.C. Conway 1967 E. Huster & H. Verbeek 1992 E. Cosulich et al K. Ashktorab et al A. Alessandrello et al M. Galeazzi et al C. Arnaboldi et al. Q-values of 187 Re (β - ) and 163 Ho (EC) PI-ICR technique at SHIPTRAP SHIPTRAP measurement (April 2014) M( 187 Re)-M( 187 Os) = 2492 (30 stat ) (15 sys ) eV

Tokyo, 2 nd of June 2014Enrique MINAYA RAMIREZ 163 Ho 1982 J.U. Andersen et al P.A. Baisden et al E. Laegsgaard et al Hartmann & Naumann 1986 S. Yasumi et al Hartmann & Naumann 1993 F. Bosch et al S. Yasumi et al F. Gatti et al ECHo 187 Re 1965 R.L. Brodzinski & D.C. Conway 1967 E. Huster & H. Verbeek 1992 E. Cosulich et al K. Ashktorab et al A. Alessandrello et al M. Galeazzi et al C. Arnaboldi et al. Q-values of 187 Re (β - ) and 163 Ho (EC) PI-ICR technique at SHIPTRAP Preparation of the Measurement of M( 163 Ho)-M( 163 Dy)

Tokyo, 2 nd of June 2014Enrique MINAYA RAMIREZ Conclusion Measurement of mass difference of singly charged non-mass doublets with a relative accuracy of 2· with the PI-ICR method Search for suitable nuclides (resonant enhancement of 0 ν 2EC transitions) with SHIPTRAP  2 candidates : 152 Gd and 156 Dy Multiple-resonance phenomenon in 156 Dy Experiments with 152 Gd and 156 Dy are feasible Q-value measurement of 187 Re with a few 10 ev accuracy

Tokyo, 2 nd of June 2014Enrique MINAYA RAMIREZ THE SHIPTRAP COLLABORATION (2010) 19/19 Thank you for your attention