Reactor As Neutrino Source

Slides:

Advertisements

Similar presentations

Lesson 8 Beta Decay. Beta-decay Beta decay is a term used to describe three types of decay in which a nuclear neutron (proton) changes into a nuclear.

Advertisements

Search for spontaneous muon emission from lead nuclei with OPERA bricks M. Giorgini, V. Popa Bologna Group OPERA Collaboration Meeting, LNGS, 19-22/05/2003.

Neutral Particles. Neutrons Neutrons are like neutral protons. –Mass is 1% larger –Interacts strongly Neutral charge complicates detection Neutron lifetime.

Lesson 8 Beta Decay. Beta -decay Beta decay is a term used to describe three types of decay in which a nuclear neutron (proton) changes into a nuclear.

Chapter 9 Nuclear Radiation

Nuclear Physics E = mc 2. Outline Theory of Special Relativity Postulates E = mc 2 The Atom What makes up the atom? What holds the atom together? Quantum.

Radiology is concerned with the application of radiation to the human body for diagnostically and therapeutically purposes. This requires an understanding.

Multi-physics coupling Application on TRIGA reactor Student Romain Henry Supervisors: Prof. Dr. IZTOK TISELJ Dr. LUKA SNOJ PhD Topic presentation 27/03/2012.

Beta and particle decay spectroscopy at the Super FRS Zenon Janas Nuclear Spectroscopy Division Warsaw University.

ELEMENTS atomic number = Z = number of protons = p mass number = number of nucleons = p + n atomic mass = experimental measurement of the mass of the.

Anti-neutrinos Spectra from Nuclear Reactors Alejandro Sonzogni National Nuclear Data Center.

Determining the NUMBER of Protons Electrons and Neutrons in Atoms, Ions, and Isotopes.

Chapter 4. Power From Fission 1.Introduction 2.Characteristics of Fission 3. General Features 4. Commercial Reactors 5. Nuclear Reactor Safety 6. Nuclear.

Known nuclides PROPERTIES OF FUNDAMENTAL PARTICLES Particle Symbol Charge Mass (x Coulombs) (x kg) Proton P Neutron N.

Chapter 15 Nuclear Radiation

Advanced Burning Building the Heavy Elements. Advanced Burning 2  Advanced burning can be (is) very inhomogeneous  The process is very important to.

Closing a shell-> Stable atom, high ionization energy.

1 Segrè Lost … ! Nuclear Fission How much is recoverable? How much is recoverable? What about capture gammas? (produced by -1 neutrons) What about capture.

A monochromatic neutrino beam for  13 and  J. Bernabeu U. de Valencia and IFIC NO-VE III International Workshop on: "NEUTRINO OSCILLATIONS IN VENICE"

Non-equilibrium Antineutrino spectrum from a Nuclear reactor We consider the evolution of the reactor antineutrino energy spectrum during the periods of.

Fission By Tony Chitty. Fission Nuclear Fission is the splitting of an atomic nucleus. Atomic bombs and nuclear reactors both perform nuclear fission.

1 G. Cambi, D.G. Cepraga, M. Frisoni Enea & Bologna University Team OSIRIS neutronic and activation simulation with Scalenea-ANITA in support of PACTITER/CORELE.

1 Work report ( ) Haoqi Lu IHEP Neutrino group

Nuclear Stability and Decay 1500 different nuclei are known. Only 264 are stable and do not decay. The stability of a nucleus depends on its neutron-to-

Nuclear Stability You should be aware that: A nucleus can be naturally unstable Instability can be induced into a nucleus – for example if we bombard.

Nuclear Pharmacy Lecture 2.

M-C simulation of reactor e flux;

Mass of constituent parts of the nucleus:

Building a Lego universe Activities using Lego to illustrate a range of particle interactions

Reactor anti-neutrinos and neutrinos

5.2 Nuclear Reactions In the nuclear equation for alpha decay, the mass number of the new nucleus decreases by 4 and its atomic number decreases.

Nuclear Radiation.

Nuclear Reactions.

Nuclear Transformations

M-C simulation of reactor e flux;

½ - life The decay of a single nuclei is totally random

A B 21085At Fe Mo 5827Co 3216S Pb4+ Symbol

How precisely do we know the antineutrino source spectrum from a nuclear reactor? Klaus Schreckenbach (TU München) Klaus Schreckenbach.

E ISOTOPES, NUCLIDES protons, p neutrons, n

Chapter 19 Coordination Complexes (Nov. 8 and 10)

Happy Friday! Please take out note packet and calculator.

Setting of various sources A

Alpha, Beta, and Gamma Decay

Chapter 9 Nuclear Radiation

Chapter 21 Nuclear Radiation

Chapter 1 Nuclear Energy

Resonance Reactions HW 34 In the 19F(p,) reaction:

Radioactive Dating pp

CHAPTER 24 Nuclear Energy

RADIOCHEMICAL METHOD IN ACTIVATION ANALYSIS & ISOTOPIC DILUTION METHOD

Size of Nuclei R = ro A1/3 T&R Figure 12.2.

Harnessing the Power of the Sun

CHAPTER 24 Nuclear Energy

Nuclear Stability and Decay

Nuclear Chemistry.

Harnessing the Power of the Sun

Building the Heavy Elements

Nuclear Chemistry Chapter 21.

Nuclear Chemistry Chapter 21.

Nuclear Chemistry.

The need for cross section measurements for neutron-induced reactions

Nuclear Chemistry The energy of life.

Unit 4 – Nuclear Reactions

1. Alpha decay of radium-226 with gamma emission

Nuclear Instability Elliott.

Nuclear Chemistry Nuclear ≠ Nucluar.

Chapter 21 Section 1 – The Nucleus Nuclear Chemistry.

Presentation transcript:

Reactor As Neutrino Source Fission Material Fission Products Neutrons odd-odd nuclei Structural materials of reactor Electron capture or + decay ( neglected ) νe Emission Captured Mostly rich in neutrons ¯ Decay back to  stable valley Anti-neutrino Emisson

Simplified reactor model Candidate isotopes: 50Cr in RC , SS & Zr-alloy; 54Fe in RC , SS & Zr-alloy; 58Ni in RC , SS& Zr-alloy; 112Sn in Zr-alloy; In SS: 50Cr --0.95%; 54Fe --4.2%; 58Ni --6.3%; 112Sn --0%. In RC: 50Cr --0.01%; 54Fe --0.1%; 58Ni --0.63%; 112Sn --0%. 51Cr + e- 51V + νe 55Fe + e- 55Mn + νe 59Ni + e- 59Co + νe 113Sn + e- 113In + νe Active mass of RC, SS and Zr-alloy(tons): 4967, 1040, 33

Simulation procedure Source neutron sampling; Neutron flux estimation; Position: from fuel material homogeneously; Energy: follow Watt fission spectrum; Neutron flux estimation; Track length estimation for flux simulation; Neutron capture probability be tallied;

Cross Check K-eff : Total neutron capture probability: Real value: 0.9~1; Simulated result on our model: 0.77; (little under estimated) Total neutron capture probability: ∑P n_capture = 1

Neutrino flux calculation In which: :ratio of neutron capture probability of the ith isotope in cell j to the total neutron capture probability of all the material in cell j : nuclei number of the ith kind isotope in cell j;; : neutron capture cross section of the isotope i in cell j, i=1,2…nj; : electron capture branch ratio of the (A+1) isotope , which is produced from the ith isotope with atomic mass A via neutron capture; : neutron capture probability of cell j; : neutron flux in jth. cell; j=1,2,…M;

Simulation Result Geometry distribution of neutron capture probability Simulated neutrino emission Spectrum ; Total neutrino emission rate normalized to per fission is: ~0.075 Correspond to an emission rate of 6 νe per fission on the energy range of < 1MeV ; ~ 10-2;