Presentation is loading. Please wait.

Presentation is loading. Please wait.

Neutrino group at CENBG Study of neutrino properties ……. Nature and mass of the neutrino Neutrinoless double beta decay search NEMO 3 experiment SuperNEMO.

Similar presentations


Presentation on theme: "Neutrino group at CENBG Study of neutrino properties ……. Nature and mass of the neutrino Neutrinoless double beta decay search NEMO 3 experiment SuperNEMO."— Presentation transcript:

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

2 Tritium decay m ve <2.3 eV Cosmology m i <~1 eV < eV Neutrino mass absolute mass ? m2m2 m12m22m32m12m22m32 Degenerate m 1 m 2 m 3 » |m i -m j | Normal hierarchy m 3 > m 2 ~m 1 Inverted hierarchy m 2 ~m 1 >m 3 ? Mass scale ? F. Piquemal (CENBG) Nuppec Bordeaux, November

3 Dirac neutrino particle antiparticle 4 states L, R, L, R conservation of global leptonic number Majorana neutrino = 2 states L and R No conservation of global leptonic number Nature of the neutrino F. Piquemal (CENBG) CS IN2P3 2005/03/05 Majorana neutrinos exist in most of GUT and supersymmetric models If Majorana and CP violation in leptonic sector -> leptogenesis Majorana neutrinos imply global leptonic number violation

4 n n p p e-e- e-e- e e h h h h (A,Z)(A,Z+1)(A,Z+2) Neutrinoless Double Beta decay L=2 = Majorana neutrino L R massive neutrino Other possible process: V+A, Majoron, SUSY T 1/2 = F(Q,Z) |M| 2 2 Phase space factor Nuclear matrix element effective neutrino Mass: = m 1 |U e1 | 2 + m 2 |U e2 | 2.e i 1 + m 3 |U e3 | 2.e i 2 |Uei|: mixing matrix elements 1 et 2: Majorana phases 5 F. Piquemal (CENBG) Nuppec Bordeaux, November

5 Feruglio F., Strumia A., Vissani F. hep-ph/ Present status 10 years 5 years Degenerated Normal Hierarchy Inverse hierarchy Klapdor point (0.39 eV) Neutrinoless Double beta and neutrinos mass scale F. Piquemal (CENBG) Nuppec Bordeaux, November

6 3 m 4 m B (25 G) 20 sectors Source : 10 kg of isotopes cylindrical, S = 20 m 2, 60 mg/cm 2 Tracking detector : drift wire chamber operating in Geiger mode (6180 cells) Gas: He + 4% ethyl alcohol + 1% Ar + 0.1% H 2 O Calorimeter : 1940 plastic scintillators coupled to low radioactivity PMTs Magnetic field: 25 Gauss Gamma shield: Pure Iron (18 cm) Neutron shield: borated water + Wood The NEMO3 detector Fréjus Underground Laboratory : 4800 m.w.e. Background: natural radioactivity, mainly 214 Bi et 208 Tl ( 2.6 MeV) Radon, neutrons (n, ), muons, Able to identify e, e, and F. Piquemal (CENBG) Nuppec Bordeaux, November

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

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

9

10

11

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

13

14 SuperNEMO preliminary design Plane geometry Top view Side view Source (40 mg/cm 2 ) 12m 2, tracking volume (~3000 channels)and calorimeter (~1000 PMT) Modular (~5 kg of enriched isotope/module) 5 m 1 m 4 m 100 kg: 20 modules ~ channels for drift chamber ~ PMT F. Piquemal (CENBG) Nuppec Bordeaux, November

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

16

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 Bg/kg in 208 Tl Improvements of Ge detector 60 Bq/kg to 10 Bq/kg for 1kg and 1 month Improvements of radon detectors F. Piquemal (CENBG) Nuppec Bordeaux, November

18 Requirements for the measurement of radioactivity: simple and fast (>1000 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 Radioactivity of materials: Selection and control Gamma spectroscopy with Ge detectors Development of ultra-low background Ge spectrometers with private company F. Piquemal (CENBG) Nuppec Bordeaux, November

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

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

21 Photography of the expected Thomas Jefferson bottles of wine from 1784 and 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

22 No 137 Cs in Wine (< 1952)………. Development in progress: to date the bottle glass by 40 K activity ….. But engravings made using an electrical high speed diamond drill with a movable head F. Piquemal (CENBG) Nuppec Bordeaux, November

23 Project of radioactive measurement platform at CENBG to group all the Ge detector from the different laboratories on the same site 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 ……..


Download ppt "Neutrino group at CENBG Study of neutrino properties ……. Nature and mass of the neutrino Neutrinoless double beta decay search NEMO 3 experiment SuperNEMO."

Similar presentations


Ads by Google