Compton Add-Back Protocols for use with the EXOGAM Array Adam Garnsworthy University of Surrey Methods for improving spectra through reducing the effects.

Slides:

Advertisements

Similar presentations

The AGATA Project First 4pi -ray spectrometer built completely from Germanium detectors. Based on the novel technique of gamma-ray tracking. Measures radiation.

Advertisements

Applications of Nuclear Physics Applications of Nuclear Physics (Instrumentation) Dr Andy Boston Frontiers of gamma-ray spectroscopy.

D S Judson UNTF Forum Salford. Outline The Compton imaging process The PORGAMRAYS project What is it? How does it work? Detector description Spectroscopic.

Detector Characterisation Group

Advanced GAmma Tracking Array

GEANT4 Simulations of TIGRESS

Detector systems 1) Anti-Compton spectrometers 2) Pair spectrometers 3) Crystal spheres, walls, complex set-ups of semiconductor and scintillation detectors.

Owned and operated as a joint venture by a consortium of Canadian universities via a contribution through the National Research Council Canada Propriété.

First results of the EXILL&FATIMA campaign at the Institut Laue Langevin J Jolie 1, J.-M. Régis 1, D. Wilmsen 1, N. Saed-Samii 1, N. Warr 1, G. De France.

Proton Inelastic Scattering on Island-of-Inversion Nuclei Shin’ichiro Michimasa (CNS, Univ. of Tokyo) Phy. Rev. C 89, (2014)

Semiconductor detectors for Compton imaging in nuclear medicine

SmartPET: A Small Animal PET Demonstrator using HyperPure germanium Planar Detectors R. Cooper 1 st year PhD Student

High granularity to reduce the effect of the “prompt flash” radiation Polarization sensitivity Imaging capabilities for background suppression DESPEC (DEcay.

Pete Jones University of Jyväskylä INTAG Workshop GSI, Germany May 2007 Status of digital electronics at JYFL Pete Jones Department of Physics University.

N Network for Active Targets 12 institutions (France, Spain, UK, Germany, Poland) GANIL, France CENBG Bordeaux, France SPhN/DAPNIA/DSM Saclay, France IPN.

12 th January 2011 PRESPEC Decay Physics Workshop University of Brighton 2011 High-spin states feeding seniority isomers in the heaviest N=82 isotones.

The evolution of nuclear structure in light osmium isotopes; gamma ray spectroscopy of 163 Os and 165 Os Mark Drummond.

Analysis and Results 3.Gamma-ray Spectra of 134 Cs The background subtracted spectra of 605 keV and 796 keV in multiple hit events, and their coincidence.

1107 Series of related experiments; first for transfer with TIGRESS Nuclear structure motivation for 25,27 Na beams Nuclear astrophysics motivation for.

A LaBr3 Fast Timing Array of NUSTAR detectors at JYFL

Anthony Sweeney Position Sensitive Detectors 9 Aberystwyth 2011.

Depletion Region Dynamics of an AGATA Detector Steven Moon University of Liverpool UNTF 2010, University of Salford 14 th -16 nd April 2010.

TRACKING TEAM Introduction What has been done What still needs to be done.

AGATA: Advanced Gamma Tracking Array

Workshop on Physics on Nuclei at Extremes, Tokyo Institute of Technology, Institute for Nuclear Research and Nuclear Energy Bulgarian Academy.

EWON Workshop, Prague, May 2007 GOSIA as a tool for COULEX on exotic beams Katarzyna Wrzosek Heavy Ion Laboratory Warsaw University.

Gamma-Ray Energy Tracking Array GRETINA The 11 th International Conference on Nucleus-Nucleus Collisions May 27- June1, 2012, San Antonio TX I-Yang Lee.

John Simpson Nuclear Physics Group Daresbury Laboratory The AGATA project NUSTAR ’05 University of Surrey January 2005.

Compton Camera development for the imaging of high energy gamma rays 1 Martin Jones UNTF 2010 Salford – April 14 th Martin.

Status of the ISOLDE DECAY STATION - IDS Hilde De Witte IDS status report, ISCC, June 24 th 2014.

SPECT imaging with semiconductor detectors

Paul Greenlees, Department of Physics, University of Jyväskylä, FinlandENAM’04, Callaway Gardens, Sept04 In-beam and decay spectroscopy of transfermium.

Wolfram KORTEN, JRA-02 AGATAEURONS PCC-Meeting, Mainz (Germany), April 2006 Status of the AGATA project Recent developments Milestones and deliverables.

Search for two-phonon octupole excitations in 146 Gd Energy Postgraduate Conference 2013 University of Zululand/ University of the Western Cape Nontobeko.

FINUPHY Instrumentation for radioactive nuclear beam facilities Rauno Julin FINUPHY Madeira, February 9, 2005.

F. Azaiez (IPN-Orsay) The European Collaboration for Stable Ion Beams – ECOS Pushing the limits with high intensity stable beams A typical bottom up initiative.

Isomer Studies as Probes of Nuclear Structure in Heavy, Neutron-Rich Nuclei Dr. Paddy Regan Dept. of Physics University of Surrey Guildford, GU2 7XH

Pygmy Dipole Resonance in 64Fe

Future for (Stopped) RISING.....the road to DESPEC.

Concept of the scanning table in Strasbourg François DIDIERJEAN Tatjana FAUL, Fabrice STEHLIN Strasbourg AGATA week July 2008 Uppsala, Sweden.

AGATA and the Physics Programme Dino Bazzacco INFN Padova on behalf of the AGATA collaboration NuPECC Meeting with Funding Agencies November 29, 2004,

A Study of Background Particles for the Implementation of a Neutron Veto into SuperCDMS Johanna-Laina Fischer 1, Dr. Lauren Hsu 2 1 Physics and Space Sciences.

Simulation of the energy response of  rays in CsI crystal arrays Thomas ZERGUERRAS EXL-R3B Collaboration Meeting, Orsay (France), 02/02/ /03/2006.

A new position sensitive strip array Wilton Catford (Surrey, UK) with LPC Caen, Birmingham, Paisley T R A ransfer eaction rray.

AGATA AGATA Advanced Gamma-Ray Tracking Array Next-generation spectrometer based on  -ray tracking Radioactive and stable beams, high recoil velocities.

The γ-flash problem at cross-section measurements by the prompt in beam γ-ray spectroscopy at n-TOF facility at CERN N. Citakovic, S. Jokic, S. Lukic,

Magnetic moment measurements with the high-velocity transient field (HVTF) technique at relativistic energies Andrea Jungclaus IEM-CSIC Madrid, Spain Andrew.

AGATA Week Introduction John Simpson Nuclear Physics Group GSI, February 2005.

Shootout experiment GSFMA315 at a glance 122 Sn( 40 Ar[170MeV],4n) 158 Er 12 C( 84 Kr[394MeV],4n) 92 Mo GSGT 1:Mo,Tu 2:Tu,We,Th 3:Th,Fr 4:Sa High multiplicity.

Development of a Segmented Planar Germanium Imaging Detector

RESULTS: Singles Gamma Spectra  Five gamma energy transitions were  observed with energies739 keV, 822 keV, 712 keV 849 keV and 111 keV γ –γ Coincidence.

Lifetime measurements from EXILL-FATIMA campaign Pietro Spagnoletti University of the West of Scotland.

Radioactive beam spectroscopy of 212 Po and 213 At with the EXOGAM array Nick Thompson University of Surrey.

Tracking Background GRETINA Software Working Group Meeting September 21-22, 2012, NSCL MSU I-Yang Lee Lawrence Berkeley National Laboratory.

Data Analysis Working Group AGATA Tasks of the WG Schedule Johan Nyberg, ADAWG meeting, June 12-13, 2003, NBI.

New decay and isomer physics studies with fast scintillation detection arrays at Coulomb Barrier separator focal planes Paddy Regan Department of Physics.

Recoil-beta tagging David Jenkins. Odd-odd N=Z Fascinating laboratory for studying interplay of T=0 and T=1 states Very unusual low level density for.

EXPERIMENTS WITH LARGE GAMMA DETECTOR ARRAYS Lecture II Ranjan Bhowmik Inter University Accelerator Centre New Delhi

Compton imaging with the PorGamRays Detector D S Judson Imaging 2010, Stockholm, 8 th -11 th June 2010.

Decay studies in Exotic, Neutron- Rich A~200 Nuclei Steven Steer for the Stopped Beam RISING Collaboration Dept. of Physics, University of Surrey Guildford,

PGRIS: Towards portable Compton Camera Imaging

Daniel Bloor & The AGATA Collaboration IoP NPPD Conference, University of Glasgow, 05/04/11. Development of a simulation package for fragmentation reactions.

Coulomb excitation of the two proton-hole nucleus 206 Hg CERN-ISOLDE, Geneva, Switzerland (M. Kowalska, E. Rapisarda, T. Stora, F.J.C. Wenander) GSI, Darmstadt,

Advanced Gamma Tracking Array Andy Boston The Advanced Gamma Tracking Array

Characterisation of a pixellated CsI detector for the Distinguish Project. 1 Martin Jones The University of Liverpool

1st PSeGe Workshop, IPNO & CSNSM Orsay 3rd -4th October 2016

E408S: The structure of 212Po from 8He reactions on 208Pb Phil Walker, University of Surrey photo from Wilton Catford (2004)

for the LNL-Ganil collaboration

Properties of neutron-rich hafnium high-spin isomers: P-325

Simulations of the AGATA Response to Relativistic Heavy Ions Beams

Presentation transcript:

Compton Add-Back Protocols for use with the EXOGAM Array Adam Garnsworthy University of Surrey Methods for improving spectra through reducing the effects of Compton scattering Applied to data from a 8 He radioactive beam experiment

The EXOGAM array 16 Clovers of Compton-suppressed segmented germanium crystals Various configurations to maximize specific features for an experiment Images taken from:

Compton scattering between crystals Polar plot and equation taken from K.S. Krane, Introductory Nuclear Physics, Wiley, 1988 The Klein-Nishina Formula

The idea and aims of Add-back Compton suppression vetoes events – Add-back algorithms reconstruct events Radioactive beam experiments suffer greatly from background Increase peak-to-background ratio of reaction gamma-rays

Construction of Algorithms Multiplicity one events – include all gamma-rays Multiplicity two events – apply conditions: Using the centre contact data only: Include hits separately in opposite crystals Add together hits in adjacent crystals Using the increased positional sensitivity of the segmentation data: Hits in different crystals are only added together if adjacent segments fire

8 He radioactive beam experiment July 2004, GANIL Background from decay of beam particles (981 keV) and bremsstrahlung Only 4 Clovers in the ‘close packed’ configuration 208 Pb( 8 He,4n) 212 Po 8 He → 8 Li + β - followed by a 981 keV γ -ray 8 Li → 7 Li + nfollowed by a 478 keV γ -ray

8 He beam spectra No Add-back Crystal Add-back Segmentation Add-back Peak/Background0.354(4)0.385(4)0.396(4) Peak/Total0.274(2)%0.346(3)%0.362(3)% Data for the 2 + → 0 + transition (727 keV):

Conclusions and further development Some 981 keV events are only partly reconstructed due to scattering between Clovers Timing conditions still to be optimized Other gating conditions, such as triples, can be used

Thank you to my collaborators 1.Department of Physics, University of Surrey, Guildford GU2 7XH, UK 2.Dept. of Nuclear Physics, Australian National University, Canberra, Australia 3.Dept. of Nuclear Physics, The Faculties, Australian National University, Canberra, Australia 4.GANIL, BP 5027, Caen Cedex F-14021, France 5.Department of Physics, Royal Institute of Technology, S , Stockholm, Sweden 6.School of Engineering, University of Brighton, Brighton BN2 4GJ, UK 7.Department of Physics, University of Liverpool, Liverpool, L69 3BX, UK 8.GSI, Planckstrasse 1, Darmstadt D-64291, Germany 9.CLRC Daresbury Laboratory, Warrington, WA4 4AD, UK 10.Institut de Phsique Nucleaire de Lyon, Lyon, France 11.Niels-Bohr-Institute, DK-2100 Copenhagen, Denmark N.J. Thompson 1, Zs. Podolyák 1, P.M. Walker 1, S.J. Williams 1, G.D. Dracoulis 2, G. de France 4, G.J. Lane 2, K. Andgren 1,5, A.M. Bruce 6, A.P. Byrne 2,3, W.N. Catford 1, B. Cederwall 5, G.A. Jones 1, B. McGuirk 7, S. Mandal 8 E.S. Paul 7, V. Pucknell 9, N. Redon 10, B. Rosse 10, R.J. Senior 2 and G. Sletten 11