Neutrino-related nuclear mass difference measurements
with a few 10 eV uncertainty at SHIPTRAP
Enrique MINAYA RAMIREZ
Max-Planck-Institut für Kernphysik, Heidelberg, Germany
1984 E. Laegsgaard et al.
1983 P.A. Baisden et al.
1982 J.U. Andersen et al.
Enrique MINAYA RAMIREZ
163Ho
Tokyo, 2nd of June 2014
1992 E. Cosulich et al.
1967 E. Huster & H. Verbeek
1965 R.L. Brodzinski & D.C. Conway
2013 ECHo
1997 F. Gatti et al.
1994 S. Yasumi et al.
1993 F. Bosch et al.
1992 Hartmann & Naumann
1986 S. Yasumi et al.
1985 Hartmann & Naumann
187Re
Direct measurements of Q-values of
187Re (β-) and 163Ho (EC) with δQ/m ~ 2·10-10
 Required now
2003 C. Arnaboldi et al.
2000 M. Galeazzi et al.
1999 A. Alessandrello et al.
1993 K. Ashktorab et al.
Neutrino mass
Q-values of 187Re (β-) & 163Ho (EC)
Experiments ECHo, HOLMES, MARE
Neutrino type
Double b- decay (bb)
• two-neutrino mode (2nbb)
• neutrinoless mode (0nbb)
 Observed T1/2 ≈ 7∙1018 - 2.5∙1025 yr
 Not observed, T1/2 > 2∙1025 yr
Double-electron capture (2EC)
• two-neutrino mode (2n 2EC)  Not observed, T1/2 > 1024 yr
• neutrinoless mode (0n 2EC)  Not observed, T1/2 ≈ 1030 yr
neutrinoless mode :
 ν is a Majorana particle
Conservation of total lepton number breaks
neutrino mass can be determined
Enrique MINAYA RAMIREZ
Tokyo, 2nd of June 2014
Q-values of neutrinoless double-Electron Capture transitions
T1/2(0nbb << T1/2(0n2EC)
0ν2EC  resonant enhancement of the capture rate (T1/2≈ 1023 yr)
1

2
2
2
2

C

m

M





n
1e
2e
Search
for nuclides
with Δ < 12 keV
1 2
T1/ 2
Q - B2eV
- Elevel

 
h
 Qεε = M1 – M2 at 100
4
 Precision mass measurements for neutrino physics
2 h
F
2

2  2 h
4
  Q - B2 h - E
Enrique MINAYA RAMIREZ
Tokyo, 2nd of June 2014
SHIPTRAP setup
n c  n  n Superconducting
magnet (7T)
Beam
Entrance
window
ion
detector
Extraction
RFQ
DC cage
Buncher
Quadrupole
deflector
RF funnel
Gas cell
B
Diaphragm
Off-line measurements
Purification trap
(PT)
Measurement trap
(MT)
m/Δm = 105
Nuclear isobars
resolved
m/Δm = 107
Isomeric states
resolved
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)
Enrique MINAYA RAMIREZ
Tokyo, 2nd of June 2014
Q-values measured at SHIPTRAP
εε
ββ
Q-value (keV)
Publications
152Gd 152Sm
55.70(18)
S. Eliseev et al., Phys. Rev. Lett. 106, 052504 (2011)
102Pd
 102Ru
106Cd 106Pd
144Sm 144Nd
1203.27(36)
2775.39(10)
1782.59(87)
M. Goncharov et al., Phys. Rev. C 84, 028501 (2011)
96Ru
 96Mo
162Er 162Dy
168Yb 168Er
2714.51(13)
1846.95(30)
1409.27(25)
S. Eliseev, D. Nesterenko et al., Phys. Rev. C 83, 038501 (2011)
156Dy 156Gd
2005.95(10)
S. Eliseev, M. Goncharov et al., Phys. Rev. C 84, 012501 (R ) (2011)
164Er 164Dy
25.07(12)
S. Eliseev et al., Phys. Rev. Lett. 107 (2011) 152501
180W 180Hf
143.20(27)
C. Droese et al., Nucl. Phys. A 875 (2012) 1
124Xe 124Te
124Sn
130Ba 130Xe
124Te
136Ce 136Ba
130Te
130Xe
Enrique MINAYA RAMIREZ
2856.73(12)
2623.74(29)
2378.49(35)
2292.64(39)
2527.55(14)
D.A. Nesterenko et al., Phys. Rev. C 86, 044313 (2012)
Tokyo, 2nd of June 2014
Resonant enhancement of neutrinoless
double-electron capture in 152Gd
T1/2 (0+→0+) ~ 1026 /<mββ>² y
S. Eliseev et al., PRL 106, 052504 (2011)
Enrique MINAYA RAMIREZ
Tokyo, 2nd of June 2014
Multiple-resonance phenomena in
156Dy
|M| = 3 for 0+ → 0+
T1/2 (0+→0+) ~ 31024 /<mββ>² y
S. Eliseev et al., PRC 84, 012501R (2011)
Enrique MINAYA RAMIREZ
Tokyo, 2nd of June 2014
Phase Imaging Ion Cyclotron Resonance (PI-ICR)
Delay-Line Detector by Roentdek GmbH
ions
y (µm)
Position sensitive detector
•
•
position resolution : 70 µm
active diameter
: 42 mm
Enrique MINAYA RAMIREZ
ToF (µs)
Tokyo, 2nd of June 2014
x (µm)
Phase Imaging Ion Cyclotron Resonance (PI-ICR)
Delay-Line Detector by Roentdek GmbH
ions
Independent Measurements
of Eigenfrequencies ν+ and νDetermination of the
spatial distribution
Radial excitation
Radial excitation followed
by a phase accumulation time
  2n  2nt
Enrique MINAYA RAMIREZ
 R
n 

2t tR
Tokyo, 2nd of June 2014
R
Φ
R
Phase Imaging Ion Cyclotron Resonance (PI-ICR)




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
Enrique MINAYA RAMIREZ
Tokyo, 2nd of June 2014
  2n  2nt
 R
n 

2t tR
Phase Imaging Ion Cyclotron Resonance (PI-ICR)




  2n  2nt
Image ion motion
Determine phase of ion motion
Excite ions
Determine phase after evolution time
PI-ICR
Ramsey TOF-ICR
 R
n 

2t tR
ΔMshiptrap = M(130Xe+) – M(129Xe+)
ΔMFSU - ΔMshiptrap = 690 (880) eV
ΔMFSU - ΔMshiptrap = 180 (240) eV
S. Eliseev et al., Phys. Rev. Lett. 110, 082501 (2013)
Enrique MINAYA RAMIREZ
 40 fold gain in resolving power
 5 fold gain in precision
compared to standard technique
 25 faster than the Ramsey TOF-ICR
Tokyo, 2nd of June 2014
PI-ICR technique at SHIPTRAP
ΔM = M(132Xe) - M(131Xe)
δ(ΔM)
)( 12sys
) eV
first ever
measurement
difference
SHIPTRAP = (30of
statmass
of singly charged medium-heavy non-mass-doublets
-10 eV
ΔMSHIPTRAP
- ΔM
± 35)
reference =
with
a relative
accuracy
of(82·10
!!!
Enrique MINAYA RAMIREZ
Tokyo, 2nd of June 2014
1984 E. Laegsgaard et al.
1983 P.A. Baisden et al.
1982 J.U. Andersen et al.
Enrique MINAYA RAMIREZ
163Ho
Tokyo, 2nd of June 2014
1992 E. Cosulich et al.
1967 E. Huster & H. Verbeek
1965 R.L. Brodzinski & D.C. Conway
2013 ECHo
1997 F. Gatti et al.
1994 S. Yasumi et al.
1993 F. Bosch et al.
1992 Hartmann & Naumann
1986 S. Yasumi et al.
1985 Hartmann & Naumann
187Re
SHIPTRAP measurement (April 2014)
M(187Re)-M(187Os) = 2492 (30stat) (15sys) eV
2003 C. Arnaboldi et al.
2000 M. Galeazzi et al.
1999 A. Alessandrello et al.
1993 K. Ashktorab et al.
PI-ICR technique at SHIPTRAP
Q-values of 187Re (β-) and 163Ho (EC)
1984 E. Laegsgaard et al.
1983 P.A. Baisden et al.
1982 J.U. Andersen et al.
Enrique MINAYA RAMIREZ
163Ho
Preparation of the Measurement of
M(163Ho)-M(163Dy)
Tokyo, 2nd of June 2014
1992 E. Cosulich et al.
1967 E. Huster & H. Verbeek
1965 R.L. Brodzinski & D.C. Conway
2013 ECHo
1997 F. Gatti et al.
1994 S. Yasumi et al.
1993 F. Bosch et al.
1992 Hartmann & Naumann
1986 S. Yasumi et al.
1985 Hartmann & Naumann
187Re
2003 C. Arnaboldi et al.
2000 M. Galeazzi et al.
1999 A. Alessandrello et al.
1993 K. Ashktorab et al.
PI-ICR technique at SHIPTRAP
Q-values of 187Re (β-) and 163Ho (EC)
Conclusion
Search for suitable nuclides (resonant enhancement of 0ν2EC
transitions) with SHIPTRAP  2 candidates :152Gd and 156Dy
Experiments with 152Gd and 156Dy are feasible
Multiple-resonance phenomenon in 156Dy
Measurement of mass difference of singly charged non-mass
doublets with a relative accuracy of 2·10-10 with the PI-ICR method
Q-value measurement of 187Re with a few 10 ev accuracy
Enrique MINAYA RAMIREZ
Tokyo, 2nd of June 2014
THE SHIPTRAP COLLABORATION
(2010)
Enrique MINAYA RAMIREZ
Tokyo, 2nd of June 2014
19/19