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

Tokyo, 2nd of June 2014Enrique MINAYA RAMIREZ

THE SHIPTRAP COLLABORATION

(2010)

19/19

Thank you for y

our atte

ntion