Prsentation PowerPoint

1
Neutrino group at CENBG
G. Broudin, Ph. Hubert, Ch. Marquet,G. Lutter,
A. Nachab, F. Perrot, F. Piquemal, J.S. Ricol
Study of neutrino properties . Nature and
mass of the neutrino Neutrinoless double
beta decay search NEMO 3 experiment
SuperNEMO RD
.. and to date the wine
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
2
Neutrino mass
absolute mass ?
Tritium decay mve lt2.3 eV Cosmology
?milt1 eV ??(0n) ltmngt lt 0.3-0.8 eV
Mass scale ?
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
3
Nature of the neutrino
Dirac neutrino particle ? antiparticle 4
states nL,nR,nL, nR conservation of global
leptonic number Majorana neutrino nn 2
states nL and nR No
conservation of global leptonic number
Majorana neutrinos exist in most of GUT and
supersymmetric models If nMajorana and CP
violation in leptonic sector -gt leptogenesis
Majorana neutrinos imply global leptonic
number violation
F. Piquemal (CENBG)



CS IN2P3 2005/03/05

4
Neutrinoless Double Beta decay
?????????????????????????????????L2 ?? ?
Majorana neutrino ?L ? ?R massive
neutrino Other possible process VA, Majoron,
SUSY
Nuclear matrix element
Phase space factor
5
effective neutrino
Mass ltm?gt m1Ue12 m2Ue22.ei?1
m3Ue32.ei?2 Uei mixing matrix elements ?1
et??2 Majorana phases
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
5
Neutrinoless Double beta and neutrinos mass scale
Feruglio F. , Strumia A. , Vissani F.
hep-ph/0201291
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
6
The NEMO3 detector
Fréjus Underground Laboratory 4800 m.w.e.
Source 10 kg of ?? isotopes cylindrical, S
20 m2, 60 mg/cm2 Tracking detector drift
wire chamber operating in Geiger mode
(6180 cells) Gas He 4 ethyl alcohol 1 Ar
0.1 H2O Calorimeter 1940 plastic
scintillators coupled to low radioactivity
PMTs
Background natural radioactivity, mainly 214Bi
et 208Tl (g 2.6 MeV)
Radon, neutrons (n,g), muons, bb(2n)
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
7
During installation AUGUST 2001
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
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bb decay isotopes in NEMO-3 detector
116Cd 405 g Qbb 2805 keV
96Zr 9.4 g Qbb 3350 keV
150Nd 37.0 g Qbb 3367 keV
48Ca 7.0 g Qbb 4272 keV
130Te 454 g Qbb 2529 keV
External bkg measurement
100Mo 6.914 kg Qbb 3034 keV
82Se 0.932 kg Qbb 2995 keV
natTe 491 g
Cu 621 g
(All enriched isotopes produced in Russia)
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
9
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
10
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
11
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
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SuperNEMO project
Objective to built a detector sensitive to 2
1026 y
Collaboration NEMO new labs 70 physicists,
11 countries, 27 laboratories
USA MHC INL U. Texas
Japan U. Saga KEK U Osaka
Marocco Fes U.
Russia JINR Dubna ITEP Mosow Kurchatov Institute
Finland U. Jyvaskula
UK UC London U Manchester IC London
Ukraine INR Kiev ISMA Kharkov
France CEN Bordeaux IReS Strasbourg LAL ORSAY LPC
Caen LSCE Gif/Yvette
Slovaquia U. Bratislava
Spain U. Valence U. Saragosse U. Barcelone
Czech Republic Charles U. Prague IEAP Prague
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
13
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
14
SuperNEMO preliminary design
Plane geometry
Source (40 mg/cm2) 12m2
, tracking volume (3000 channels)
and calorimeter (1000 PMT)
Modular (5 kg of enriched isotope/module)
100 kg 20 modules 60 000 channels
for drift chamber 20 000 PMT
4 m
1 m
5 m
Top view
Side view
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
15
Open setup 02
J.FORGET SuperNEMO LAL v09/2006
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
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F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
17
CENBG contribution to SuperNEMO
Calorimeter from 8 to 4 (FWHM) at 3 MeV
Improvement of plastic scintillator
(collaboration with JINR Dubna (Russie) and
ISMA Karkhov (Ukraine) Development with
liquid scintillator Improvements of
Photomultiplier with Photonis company
Calibrations Electronics readout Low
radioactivity measurement  BiPo  detector
to measure source foil at the level of 2 mBg/kg
in 208Tl Improvements of Ge detector 60
mBq/kg to 10 mBq/kg for 1kg and 1 month
Improvements of radon detectors
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
18
Radioactivity of materials Selection and control

• Requirements for the measurement of
  radioactivity
• simple and fast (gt1000 samples)
• non destructive (enriched isotopes !)
• measurement of large quantities ( 1 kg) and
  different geometries (powder, strips,)
• high energy resolution for an easy isotope
  identification
• measurement of the non-equilibrium in
  radioactive families ( U/Th/Ra)
• highest detection efficiency

Gamma spectroscopy with Ge detectors
Development of ultra-low background Ge
spectrometers with private company
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
19
Dating of wine and Radioactivity
Question from DGCCRF a french government
agency charged with protecting consumers and
preventing fraud How to confirm the
authenticity of vintage ?
Translation by a physicist Is it possible to
deduce vintage from radioactivity measurements?
Moreover without opening the bottle ?
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
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To date the wine
Chateaux Laffite and Margaux 1900 ?
137Cs in Wine
Nuclear tests
Tchernobyl
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
21
Photography of the expected Thomas Jefferson
bottles of wine from 1784 and 1787. Two bottles
are from Chateau Lafite, the two other are from
Branne Mouton, which nowadays is called Mouton
Rothschild
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
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No 137Cs in Wine (lt 1952).
Development in progress to date the bottle glass
by 40K activity
F. Piquemal (CENBG)



Nuppec Bordeaux, November 7-8
2006
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Other applications in collaboration with other
laboratories from University of Bordeaux I
(Sciences), Bordeaux II (Medicine), Bordeaux III
(archeology),DGCCRF - control of the
origin of atlantic salt - control of
the origin of Agen pruns - Measurements
for medical applications - Archeology
..
Project of radioactive measurement platform at
CENBG to group all the Ge detector from the
different laboratories on the same site