Double-beta decay of 96 Zr: nuclear physics meets geology ADAM MAYER 1 DIETER FREKERS 2, MICHAEL WIESER 1, ROBERT THOMPSON 1 AND JENS DILLING 3 1 UNIVERSITY.

Slides:

Advertisements

Similar presentations

J. J. Thompson was able to separate two neon isotopes (Ne-20 and Ne-22) in 1913, which was the first evidence that isotopes exist for stable elements.

Advertisements

Atomic masses – Competition worldwide K. Blaum, Phys. Rep. 425, 1-78 (2006) Penning-trap mass spectrometry groups for stable masses: D. Pritchard, MIT.

Penning-Trap Mass Spectrometry for Neutrino Physics

Other clues to the formation of the Solar System Inner planets are small and dense Outer planets are large and have low density Satellites of the outer.

Ion Sources Some characteristics of ion sources (especially in high precision work): It should have high efficiency in generating ions of the element of.

Precision mass measurements for fundamental studies Tommi Eronen Max-Planck-Institut für Kernphysik Heidelberg, Germany.

Introduction to Nuclear Chemistry. © 2009, Prentice-Hall, Inc. The Nucleus Remember that the nucleus is comprised of the two nucleons, protons and neutrons.

Double beta decay nuclear matrix elements in deformed nuclei O. Moreno, R. Álvarez-Rodríguez, P. Sarriguren, E. Moya de Guerra F. Šimkovic, A. Faessler.

Neutrino Mass and Mixing David Sinclair Carleton University PIC2004.

More Nuclear Chemistry Abundance Binding Energy Fission Isotopic Signatures.

The Age of Things: Sticks, Stones and the Universe

Lecture 18 Mass Spectroscopy I Harris Ch.22.

A Penning trap as a precision mass balance – Q-Value determinations with ISOLTRAP and SMILETRAP Outline Workshop on NDBD, Durham, Klaus Blaum:

Absolute Time. Radioactive Decay Parent Isotope --> Daughter Isotope + Decay Particle + Energy.

Review of Atomic Model. Key Words subatomic particle energy levels atomic mass protonisotope electronneutronion atomic mass unit (u)atomic number.

Types of Analyses Single Collector –Uses only one collector or detector –This is the case with a Daly or EM Advantages: –Need only one detector –Peaks.

V. V. Parkhomchuk, S.A. Rastigeev BINP, Novosibirsk, Russia. ION SELECTION IN ACCELERATOR MASS SPECTROMETER BINP SB RAS.

Electron Capture branching ratio measurements at TITAN-TRIUMF T. Brunner, D. Frekers, A. Lapierre, R. Krücken, I. Tanihata, and J. Dilling for the TITAN.

1 TCP06 Parksville 8/5/06 Electron capture branching ratios for the nuclear matrix elements in double-beta decay using TITAN ◆ Nuclear matrix elements.

Nuclear Chemistry Nuclear chemistry is the study of the structure of atomic nuclei and the changes they undergo.

Nuclear Chemistry.

Structures and shapes from ground state properties 1.Nuclear properties from laser spectroscopy 2.Status of laser measurements of moments and radii 3.New.

Collinear laser spectroscopy of 42g,mSc

Chapters 9, 11, 12 Concepts covered that will also be candidates for exam questions.

DF. Electron capture branching ratios for the odd-odd intermediate nuclei in  decay using TITAN Objectives: – experimental determination of nuclear.

TITAN Mass Measurement of 11 Li (and other halo nuclei) Ryan Ringle, TRIUMF.

Preparation of an isomerically pure beam and future experiments Outline TAS Workshop, Caen, March 30-31, 2004 Klaus Blaum for the ISOLTRAP Collaboration.

Radioactive ion beam facilities How does they work ? 2012 Student Practice in JINR Fields of Research 9.oct.2012 I. Sivacekflerovlab.jinr.ru.

Nuclear Chemistry. Hiroshima Nagasaki Nuclear Fission : splitting of the atom into different parts.

The Nucleus of the Atom Chapter 12 Great Idea: Nuclear energy depends on the conversion of mass into energy.

Half-Life Nuclear Chemistry. What is Half-Life? The time it takes for half of a given amount of a radioactive isotope to undergo decay.

Mass measurements using low energy ion beams -1- C. Thibault 31 mars 2004 Motivations to measure masses Present status Experimental methods for direct.

RADIOACTIVITY, NUCLEAR ENERGY, SOLAR ENERGY Introduction – Part 1 Nuclear Energy or Fission – Part 2 Solar Energy or Fusion – Part 3.

1 Chapters 18 NUCLEAR CHEMISTRY. 2 CHAPTER OUTLINE  Atomic Structure Atomic Structure  Radioactivity Radioactivity  Alpha Decay Alpha Decay  Beta.

1.3-1 Types of Radioactivity.  By the end of this section you will be able to: ◦ Observe nuclear changes and explain how they change an element. ◦ Express.

28. November 2005 Fission product yield measurements with JYFLTRAP A novel application of a Penning trap H. Penttilä, J. Äystö, V.-V. Elomaa, T. Eronen,

Kepler 1: planet with two suns. Homework #3 Due Wednesday, 11:00 p.m. Answers to all homework questions will be posted on the class website First exam:

Contribution of Penning trap mass spectrometry to neutrino physics Szilárd Nagy MPI-K Heidelberg, Germany New Instruments for Neutrino Relics and Mass,

Chapter 3 Atomic Structure. The Structure Of the Atom Particle masschargelocation Proton1 AMU +1in nucleus Neutron 1 AMU 0in nucleus Electron 0 AMU -1.

Mass spectrometry (Test) Mass spectrometry (MS) is an analytical technique that measures masses of particles and for determining the elemental composition.

Nathal Severijns, JRA-11 TRAPSPEC TRAPSPEC JRA-11 EURONS PCC Meeting, Groningen, December 2006 JRA-11 (TRAPSPEC) Improvements and developments of.

Mass Analyzers: Quadrupole ion trap?

1 stephan ettenauer for the TITAN collaboration Experimental Program on Halo Nuclei with non-accelerated Beams at TRIUMF Weakly Bound Systems in Atomic.

25.2 – Nuclear Decay. Objectives Compare and contrast alpha, beta and gamma radiation. Define the half-life of a radioactive material. Describe the process.

Notebook set-up Composition Book. Table of contentsPage 1 Nuclear Processes.

Nuclear Chemistry. Reactions Chemical Involve electrons Affected external factors (temp, pressure, catalyst) Nuclear Involve the nucleus Release WAY more.

In Progress T-Rex TAMUTrap SASSYER Active Target Det RTC + chemistry Radioisotope production.

Nanuf03, Bucharest, Stefan Kopecky Traps for fission product ions at IGISOL Experimental Facilities Mass Measurements Status and Future Perspectives.

Nuclear Chemistry: Half-Life. Half Life Definition = time it takes for half of a radioactive sample to decay; describes rate of decay The stability of.

Catherine Jeandel, Marseille 2004: Geochemistry in KEOPS Chlorophyll (mg m -3 ) Among the objectives of KEOPS - Identification of the mechanisms of natural.

Atoms: The Building Blocks of Matter Unit 2.  Introduction to the Atom Modern Atomic Theory Subatomic Particles Isotopes Ions Essential Standards and.

Nuclear and Radiation Physics, BAU, 1 st Semester, (Saed Dababneh) Nuclear and Radiation Physics Why nuclear physics? Why radiation.

Outline Sebastian George Tokyo 2007 High-Precision Mass Spectrometry

Why Accelerator Mass spectrometry (AMS) The determination of the concentration of a given radionuclide in a sample can be done in 2 ways: a) measure the.

WITCH - a first determination of the beta-neutrino angular correlation coefficient in 35 Ar decay S. Van Gorp, M. Breitenfeldt, V. De Leebeeck,T. Porobic,

2 protons 2 neutrons Energy of a nucleus The mass of a helium nucleus is slightly smaller (

Lecture 8 Radiometric Dating

Alexander Herlert High-precision mass measurements for reliable nuclear-astrophysics calculations CERN, PH-IS NIC-IX, CERN, Geneva, June 29, 2006.

Jeff Taylor Ages of Highland Rocks1 Ages of Pristine Highlands Rocks Ages of lunar rocks informative about: –Timing of magma ocean crystallization –Timescales.

The Basics of Chemistry Version 8.  This is partner collaboration  On a separate piece of paper you will answer each question.  Upon viewing the answer,

TRIGA-SPEC: Developement platform for MATS and LaSpec at FAIR Double-beta transition Q-value measurements with TRIGA-TRAP NUSTAR Meeting Christian.

NUCLEAR CHEMISTRY Objectives Objective 1 Define radioactivity and distinguish between natural and artificial.

Michael Dworschak, GSI for the SHIPTRAP collaboration

Relativistic Kinematics for the Binding Energy of Nuclear Reactions

One way to improve first class mass ISOLTRAP

Emmanuel Clément IN2P3/GANIL – Caen France

Ion beam analysis of materials with MeV beams at the Ruhr University Bochum Ruhr-Uni-Bochum Contribution to the ISOLDE workshop, Dec, 4th 2017, Hans-Werner.

Important Terms ATOM - Smallest unit of an element that keeps its chemical properties ELEMENT – Unique substance with the same number of protons in every.

Instrumental Chemistry

The Effect Of A Magnetic Field On Charged Particles

Presentation transcript:

Double-beta decay of 96 Zr: nuclear physics meets geology ADAM MAYER 1 DIETER FREKERS 2, MICHAEL WIESER 1, ROBERT THOMPSON 1 AND JENS DILLING 3 1 UNIVERSITY OF CALGARY 2 UNIVERSITY MÜNSTER 3 TRIUMF

Motivation and summary  Double-beta decay measurements give insight into properties of the neutrino, one of the least well understood particles  Objective: Determine the half-life of the ββ-decay of 96 Zr → 96 Mo  Approach: Use two different measurements to determine different parameters related to the half-life  At U of Calgary: geochemical measurement of ββ-decay half-life  At U Jyväskylä: measure the Q-value of the decay  Motivation: Understand a discrepancy between a direct measurement of the decay at NEMO in 2010 and the last geological measurement from 2001

96 Zr decay scheme  Geochemical measurement  0.94(32) x a  Wieser and DeLaeter 2001  ββ counting measurement  2.4(3) x a  NEMO Collaboration 2010  > 2σ difference!  Competing single beta-decay half-life?  Theoretical half-life: ~2.6 x a  Dependent on Q-value of the decay

Double-beta decay half-life by stable isotope geochemistry  Verify measurements by Wieser and DeLaeter in 2001  Excess 96 Mo compared to 96 Zr tells us the half-life of the decay

Sample preparation: Acid digestion  Sample digested in high temperature concentrated HF in an acid digestion bomb 10 mL HF 250 mg zircon 200 °C

Sample preparation: Mo separation  In order to measure 96 Mo, we must first separate the Mo from the Zr Anion Exchange with 4 M HCl

Sample analysis: MC-ICP-MS

How will we improve over the previous measurement? Previous (TIMS)New (MC-ICP-MS) Sensitivity100 ng Mo10 ng Mo Chemistry blank10 ng Mo1 ng Mo Precision1.0 ‰0.1 ‰  Original measurements performed with Thermal Ionization MS  All related measurements, i.e. Zr concentration and U-Pb dating will be performed in house

Q-value measurements at JYFLTRAP  Geological measurements so far provide evidence for 2 nd decay route  Single β-decay half-life dependent Q-value

JYFLTRAP  Penning trap mass spectrometer at University of Jyväskylä, Finland

Penning trap mass measurements  Ion motion dependent on q/m and trap parameters  (1) magnetron  (2) axial  (3) reduced cyclotron  Apply RF quadrupole field  Excite reduced cyclotron motion  Measure time-of-flight to determine energy gain  Measure relative to reference isotope (i.e. 85 Rb) to eliminate uncertainty due to B-field

Questions we will answer  Can we confirm the discrepancy between the NEMO direct and Wieser/DeLaeter geological measurements?  Is a highly forbidden single-beta decay also contributing to the decay?  If the discrepancy is confirmed, and cannot be accounted for, is this evidence for time-dependent double-beta parameters?