Post on 13-Dec-2015
Neutrino-related nuclear mass difference measurementswith a few 10 eV uncertainty at SHIPTRAP
Enrique MINAYA RAMIREZ
Max-Planck-Institut für Kernphysik, Heidelberg, Germany
Tokyo, 2nd of June 2014Enrique MINAYA RAMIREZ
163Ho
1982
J.U
. And
erse
n et
al.
1983
P.A
. Bai
sden
et a
l.
1984
E. L
aegs
gaar
d et
al.
1985
Har
tman
n &
Nau
man
n
1986
S. Y
asum
i et a
l.
1992
Har
tman
n &
Nau
man
n
1993
F. B
osch
et a
l.19
94 S
. Yas
umi e
t al.
1997
F. G
atti e
t al.
2013
ECH
o
187Re
1965
R.L
. Bro
dzin
ski &
D.C
. Con
way
1967
E. H
uste
r & H
. Ver
beek
1992
E. C
osul
ich
et a
l.
1993
K. A
shkt
orab
et a
l.
1999
A. A
less
andr
ello
et a
l.
2000
M. G
alea
zzi e
t al.
2003
C. A
rnab
oldi
et a
l.
Direct measurements of Q-values of 187Re (β-) and 163Ho (EC) with δQ/m ~ 2·10-10
Required now
Q-values of 187Re (β-) & 163Ho (EC)
Neutrino mass
Experiments ECHo, HOLMES, MARE
Tokyo, 2nd of June 2014Enrique MINAYA RAMIREZ
Double decay ()
• two-neutrino mode (2)
• neutrinoless mode (0)
Double-electron capture (2EC)
• two-neutrino mode (22EC)
• neutrinoless mode (02EC)
ν is a Majorana particleConservation of total lepton number breaksneutrino mass can be determined
neutrinoless mode :
Observed T1/2 ≈ 7∙1018 - 2.5∙1025 yr
Not observed, T1/2 > 2∙1025 yr
Not observed, T1/2 > 1024 yr
Not observed, T1/2 ≈ 1030 yr
Neutrino type
Tokyo, 2nd of June 2014Enrique MINAYA RAMIREZ
0ν2EC resonant enhancement of the capture rate (T1/2≈ 1023 yr)
Q-values of neutrinoless double-Electron Capture transitions
22
h2
2
e2
2
e1
22
2/1
41
EBQMmC
T
1
EBQ
F
h
h
h
2
222
2
4
Search for nuclides with Δ < 1 keV Qεε = M1 – M2 at 100 eV level
Precision mass measurements for neutrino physics
T1/2(0T1/2(EC)
Tokyo, 2nd of June 2014Enrique MINAYA RAMIREZ
ion detector
Measurement trap(MT)
m/Δm = 107
Isomeric states resolved
Buncher Quadrupoledeflector
Superconducting magnet (7T)
m/Δm = 105
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
c
Tokyo, 2nd of June 2014Enrique MINAYA RAMIREZ
εε ββ Q-value (keV) Publications
152Gd 152Sm 55.70(18) S. Eliseev et al., Phys. Rev. Lett. 106, 052504 (2011)
102Pd 102Ru106Cd 106Pd144Sm 144Nd
1203.27(36)
2775.39(10)
1782.59(87)
M. Goncharov et al., Phys. Rev. C 84, 028501 (2011)
96Ru 96Mo162Er 162Dy168Yb 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 124Te130Ba 130Xe136Ce 136Ba
124Sn 124Te130Te 130Xe
2856.73(12) 2292.64(39)
2623.74(29) 2527.55(14)
2378.49(35)
D.A. Nesterenko et al., Phys. Rev. C 86, 044313 (2012)
Q-values measured at SHIPTRAP
Tokyo, 2nd of June 2014Enrique MINAYA RAMIREZ
Resonant enhancement of neutrinolessdouble-electron capture in 152Gd
S. Eliseev et al., PRL 106, 052504 (2011)
T1/2 (0+→0+) ~ 1026 /<mββ>² y
Tokyo, 2nd of June 2014Enrique MINAYA RAMIREZ
|M| = 3 for 0+ → 0+
T1/2 (0+→0+) ~ 31024 /<mββ>² y
Multiple-resonance phenomena in 156Dy
S. Eliseev et al., PRC 84, 012501R (2011)
Tokyo, 2nd of June 2014Enrique MINAYA RAMIREZ
Phase Imaging Ion Cyclotron Resonance (PI-ICR)
• position resolution : 70 µm• active diameter : 42 mm
ToF (µs)ToF (µs) x (µm)
y (
µm
)
ions
Delay-Line Detector by Roentdek GmbH
Position sensitive detector
Tokyo, 2nd of June 2014Enrique MINAYA RAMIREZ
Phase Imaging Ion Cyclotron Resonance (PI-ICR)
ions
Delay-Line Detector by Roentdek GmbH
R Φ
R
tR
R
t
2
tn 22
Independent Measurements of Eigenfrequencies ν+ and ν-
Radial excitation
Determination of the spatial distribution
Radial excitation followed by a phase accumulation time
Tokyo, 2nd of June 2014Enrique MINAYA RAMIREZ
Image ion motion Determine phase of ion motion Excite ions Determine phase after evolution time tR
R
t
2
tn 22
S. Eliseev et al., Appl. Phys B 114 (2014) 107
Phase Imaging Ion Cyclotron Resonance (PI-ICR)
Tokyo, 2nd of June 2014Enrique MINAYA RAMIREZ
Image ion motion Determine phase of ion motion Excite ions Determine phase after evolution time tR
R
t
2
tn 22
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
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)
Ramsey TOF-ICRPI-ICR
Tokyo, 2nd of June 2014Enrique MINAYA RAMIREZ
PI-ICR technique at SHIPTRAP
ΔM = M(132Xe) - M(131Xe)
ΔMSHIPTRAP - ΔMreference = (8 ± 35) eV
δ(ΔM)SHIPTRAP = (30stat )( 12sys) eVfirst ever measurement of mass differenceof singly charged medium-heavy non-mass-doublets
with a relative accuracy of 2·10-10 !!!
Tokyo, 2nd of June 2014Enrique MINAYA RAMIREZ
163Ho
1982
J.U
. And
erse
n et
al.
1983
P.A
. Bai
sden
et a
l.
1984
E. L
aegs
gaar
d et
al.
1985
Har
tman
n &
Nau
man
n
1986
S. Y
asum
i et a
l.
1992
Har
tman
n &
Nau
man
n
1993
F. B
osch
et a
l.19
94 S
. Yas
umi e
t al.
1997
F. G
atti e
t al.
2013
ECH
o
187Re
1965
R.L
. Bro
dzin
ski &
D.C
. Con
way
1967
E. H
uste
r & H
. Ver
beek
1992
E. C
osul
ich
et a
l.
1993
K. A
shkt
orab
et a
l.
1999
A. A
less
andr
ello
et a
l.
2000
M. G
alea
zzi e
t al.
2003
C. A
rnab
oldi
et a
l.
Q-values of 187Re (β-) and 163Ho (EC)
PI-ICR technique at SHIPTRAP
SHIPTRAP measurement (April 2014)
M(187Re)-M(187Os) = 2492 (30stat) (15sys) eV
Tokyo, 2nd of June 2014Enrique MINAYA RAMIREZ
163Ho
1982
J.U
. And
erse
n et
al.
1983
P.A
. Bai
sden
et a
l.
1984
E. L
aegs
gaar
d et
al.
1985
Har
tman
n &
Nau
man
n
1986
S. Y
asum
i et a
l.
1992
Har
tman
n &
Nau
man
n
1993
F. B
osch
et a
l.19
94 S
. Yas
umi e
t al.
1997
F. G
atti e
t al.
2013
ECH
o
187Re
1965
R.L
. Bro
dzin
ski &
D.C
. Con
way
1967
E. H
uste
r & H
. Ver
beek
1992
E. C
osul
ich
et a
l.
1993
K. A
shkt
orab
et a
l.
1999
A. A
less
andr
ello
et a
l.
2000
M. G
alea
zzi e
t al.
2003
C. A
rnab
oldi
et a
l.
Q-values of 187Re (β-) and 163Ho (EC)
PI-ICR technique at SHIPTRAP
Preparation of the Measurement of
M(163Ho)-M(163Dy)
Tokyo, 2nd of June 2014Enrique MINAYA RAMIREZ
Conclusion
Measurement of mass difference of singly charged non-massdoublets with a relative accuracy of 2·10-10 with the PI-ICR method
Search for suitable nuclides (resonant enhancement of 0ν2EC transitions) with SHIPTRAP 2 candidates :152Gd and 156Dy
Multiple-resonance phenomenon in 156Dy
Experiments with 152Gd and 156Dy are feasible
Q-value measurement of 187Re with a few 10 ev accuracy