Nuclear Physics Rolling Grant
Lead Research Organisation:
University of Liverpool
Department Name: Physics
Abstract
The majority of the mass of the universe is made up of atomic nuclei that lie at the centre of the atom. The fundamental questions in nuclear physics are, 'What are the limits of nuclear existence?'; 'What are the heaviest nuclei that can be made in the laboratory?'; 'What are the limits on the angular momentum that a nucleus can sustain before fission?'; 'Do new forms of collective motion occur far from the valley of nuclear stability?' How does the ordering of quantum states, alter in highly dilute or neutron-rich matter?' The aim of this research proposal is to try to answer these questions. No one yet knows how heavy a nucleus can be; in other words, just how many neutrons and protons can be made to bind together. We will study the heaviest nuclei that can be made in the laboratory and determine their properties which will allow better predictions to be made for the 'superheavies'. For lighter nuclei we will explore in the region of the proton and neutron drip lines, which are the borders between bound and unbound nuclei. We will determine more carefully than ever before the precise location of these drip lines. As we approach the neutron drip line, only accessible for light nuclei, we will explore how the fundamental nuclear forces change their behaviour in diffuse neutron matter. On the other side of the line of stability, those at the proton drip line have so much electrical charge that they are highly unstable and try to achieve greater stability through the process of proton emission. We will investigate how nuclear behaviour is affected when protons become unbound. For these exotic systems we will also explore how the nucleus prefers to rearrange its shape, which can be a sphere, rugby ball, pear, etc. and how it stores its energy among the possible degrees of freedom. We will also investigate how the properties of these nuclei develop as we make them spin faster and faster. We will try to determine more carefully than ever before the precise nature of ultra high spin states in heavy nuclei, just before the nucleus breaks up due to fission. This programme of research will employ a large variety of experimental methods to probe many aspects of nuclear structure, mostly using instrumentation that we have constructed at several world-leading accelerator laboratories. The work will require a series of related experiments at a range of facilities in order for us to gain an insight into the answers to the questions posed above. These experiments will help theorists to refine and test their calculations that have attempted to predict the properties of nuclei, often with widely differing results. The resolution of this problem will help us to describe the complex many-body system that the nucleus represents.
Organisations
- University of Liverpool (Lead Research Organisation)
- University of Cologne (Collaboration)
- GSI (Collaboration)
- Lund University (Collaboration)
- University of Leuven (Collaboration)
- Helmholtz Association of German Research Centres (Collaboration)
- University of Jyväskylä (Collaboration)
- Facility for Antiproton and Ion Research (Collaboration)
- Johannes Gutenberg University of Mainz (Collaboration)
- European Organization for Nuclear Research (CERN) (Collaboration)
Publications
Ekström A
(2008)
0(gs)+ -->2(1)+ transition strengths in 106Sn and 108Sn.
in Physical review letters
Khuyagbaatar J
(2014)
48Ca+249Bk fusion reaction leading to element Z = 117: long-lived a-decaying 270Db and discovery of 266Lr.
in Physical review letters
Ketelhut S
(2009)
? -Ray Spectroscopy at the Limits: First Observation of Rotational Bands in Lr 255
in Physical Review Letters
Sandzelius M
(2009)
? -ray spectroscopy of Ta 163
in Physical Review C
Lagergren K
(2011)
? -soft shapes and quasiparticle excitations in 73 161 Ta 88
in Physical Review C
Gómez Hornillos M
(2009)
?-ray spectroscopy approaching the limits of existence of atomic nuclei: A study of the excited states of Pt 168 and Pt 169
in Physical Review C
Andgren K
(2008)
?-ray spectroscopy of At 197
in Physical Review C
Bianco L
(2008)
a -Decay branching ratios measured by ? -ray tagging
in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Andreyev A
(2013)
a -decay spectroscopy of the chain 179 Tl g ? 175 Au g ? 171 Ir g ? 167 Re m
in Physical Review C
Andreyev A
(2009)
a decay of At 194
in Physical Review C
Andreyev A
(2009)
a decay of Pb 180 , 181
in Physical Review C
Kalaninová Z
(2013)
a decay of the very neutron-deficient isotopes 197 - 199 Fr
in Physical Review C
Papadakis P
(2012)
A Geant4 simulation package for the SAGE spectrometer
in Journal of Physics: Conference Series
Taylor M
(2013)
A new differentially pumped plunger device to measure excited-state lifetimes in proton emitting nuclei
in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Akkoyun S
(2012)
AGATA-Advanced GAmma Tracking Array
in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Rudolph D
(2014)
Alpha-Photon Coincidence Spectroscopy Along Element 115 Decay Chains
in Acta Physica Polonica B
Harkness L
(2011)
An investigation of the performance of a coaxial HPGe detector operating in a magnetic resonance imaging field
in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Venhart M
(2017)
Application of the Broad Energy Germanium detector: A technique for elucidating ß -decay schemes which involve daughter nuclei with very low energy excited states
in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Carroll RJ
(2014)
Blurring the boundaries: decays of multiparticle isomers at the proton drip line.
in Physical review letters
Seweryniak D
(2010)
Bridging the nuclear structure gap between stable and super heavy nuclei
in Nuclear Physics A
Dimmock M
(2009)
Characterisation Results From an AGATA Prototype Detector
in IEEE Transactions on Nuclear Science
Cooper R
(2008)
Charge collection performance of a segmented planar high-purity germanium detector
in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Seliverstov M
(2013)
Charge radii of odd-A 191-211Po isotopes
in Physics Letters B
Grahn T
(2009)
Collectivity of Po 196 at low spin
in Physical Review C
Scheck M
(2011)
Combined in-beam electron and ? -ray spectroscopy of Hg 184 , 186
in Physical Review C
Konki J
(2013)
Combined in-beam gamma-ray and conversion electron spectroscopy with radioactive ion beams Simulations of a silicon detector for the SPEDE spectrometer
in EPJ Web of Conferences
Thomson J
(2010)
Competing quasiparticle configurations in W 163
in Physical Review C
Moon S
(2011)
Compton imaging with AGATA and SmartPET for DESPEC
in Journal of Instrumentation
Judson D
(2011)
Compton imaging with the PorGamRays spectrometer
in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Smallcombe J
(2019)
Confirming band assignments in 167ytterbium with gamma-gamma-electron triple-coincidence spectroscopy
in The European Physical Journal A
Bree N
(2008)
Coulomb excitation of 28 68 Ni 40 at "safe" energies
in Physical Review C
Schumaker M
(2009)
Coulomb excitation of radioactive 20, 21Na
in The European Physical Journal A
Schumaker M
(2008)
Coulomb excitation of radioactive Na 21 and its stable mirror Ne 21
in Physical Review C
Ekström A
(2010)
Coulomb excitation of the odd-odd isotopes 106, 108In
in The European Physical Journal A
Schumaker M
(2009)
Coulomb excitation of the proton-dripline nucleus Na 20
in Physical Review C
Andreyev A
(2009)
Decay of the 9 / 2 - isomer in Tl 181 and mass determination of low-lying states in Tl 181 , Au 177 , and Ir 173
in Physical Review C
Darby I
(2011)
Decay of the high-spin isomer in 160Re: Changing single-particle structure beyond the proton drip line
in Physics Letters B
Venhart M
(2011)
Decay study of 246Fm at SHIP
in The European Physical Journal A
Borri M
(2016)
Detector production for the R3B Si-tracker
in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Sorri J
(2016)
Determination of absolute internal conversion coefficients using the SAGE spectrometer
in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Trautmann W
(2009)
Differential neutron-proton squeeze-out
in Progress in Particle and Nuclear Physics
Bianco L
(2010)
Discovery of 157W and 161Os
in Physics Letters B
Cocolios TE
(2011)
Early onset of ground state deformation in neutron deficient polonium isotopes.
in Physical review letters
Ekström A
(2009)
Electric quadrupole moments of the 2 1 + states in Cd 100 , 102 , 104
in Physical Review C
Fernández-Domínguez B
(2011)
Emergence of the N = 16 shell gap in O 21
in Physical Review C
Pakarinen J
(2009)
Evidence for prolate structure in light Pb isotopes from in-beam ? -ray spectroscopy of Pb 185
in Physical Review C
Grahn T
(2009)
Evolution of collectivity in Hg 180 and Hg 182
in Physical Review C
Andgren K
(2008)
Excited states in the neutron-deficient nuclei Rn 197 , 199 , 201
in Physical Review C
Smallcombe J
(2014)
Experimental investigation of the 0 2 + band in Sm 154 as a ß-vibrational band
in Physics Letters B
CLÉMENT E
(2012)
EXPERIMENTAL MEASUREMENT OF THE DEFORMATION THROUGH THE ELECTROMAGNETIC PROBE: SHAPE COEXISTENCE IN EXOTIC KR AND SR ISOTOPES
in International Journal of Modern Physics E
Description | Our programme of research aims to measure the structure (quantum states, transition matrix elements) of bound or unbound states of exotic systems near or at the limit of nuclear existence. Its goal is to address many of the key questions in this field by applying precision measurements of the physical observables that allow rigorous testing of model predictions. In particular, we wish to understand how nuclei can support the highest values of angular momentum, how the shell behaviour, the pairing fields, the single-particle and the collective structure of nuclei evolve away from stability towards the drip lines and towards the heaviest nuclear systems, and how exotic nuclear matter behaves through studies of nuclear density and nuclear correlations. New discoveries will follow major advances in instrumentation, using intense stable beams and new beams from radioactive beam facilities. |
Exploitation Route | Nuclear theory, healthy, security and energy sectors might take our findings forward. |
Sectors | Energy,Healthcare,Security and Diplomacy |
Description | To aid theoretical understanding of nuclear physics and indirect applications to security, energy and health. |
First Year Of Impact | 2014 |
Sector | Energy,Healthcare,Security and Diplomacy |
Impact Types | Societal |
Description | Standard Grant |
Amount | £182,012 (GBP) |
Organisation | Science and Technologies Facilities Council (STFC) |
Sector | Public |
Country | United Kingdom |
Start | 10/2010 |
End | 12/2012 |
Description | Standard Grant |
Amount | £34,067 (GBP) |
Organisation | Science and Technologies Facilities Council (STFC) |
Sector | Public |
Country | United Kingdom |
Start | 10/2009 |
End | 06/2013 |
Description | GREAT collaboration |
Organisation | University of Jyvaskyla |
Department | Department of Physics |
Country | Finland |
Sector | Academic/University |
PI Contribution | Constructed GREAT spectrometer and TDR DAQ system. Spokesperson of many experiments. |
Collaborator Contribution | facility |
Impact | 24 publications |
Description | MINIBALL collaboration |
Organisation | European Organization for Nuclear Research (CERN) |
Department | ISOLDE Radioactive Ion Beam Facility |
Country | Switzerland |
Sector | Public |
PI Contribution | Expertise on Coulomb Excitation analysis, spokespersons of 2 active ISOLDE experiments |
Impact | several publications |
Description | MINIBALL collaboration |
Organisation | Lund University |
Department | Department of Physics |
Country | Sweden |
Sector | Academic/University |
PI Contribution | Expertise on Coulomb Excitation analysis, spokespersons of 2 active ISOLDE experiments |
Impact | several publications |
Description | MINIBALL collaboration |
Organisation | University of Cologne |
Department | Department of Physics |
Country | Germany |
Sector | Academic/University |
PI Contribution | Expertise on Coulomb Excitation analysis, spokespersons of 2 active ISOLDE experiments |
Impact | several publications |
Description | MINIBALL collaboration |
Organisation | University of Leuven |
Department | Department of Physics and Astronomy |
Country | Belgium |
Sector | Academic/University |
PI Contribution | Expertise on Coulomb Excitation analysis, spokespersons of 2 active ISOLDE experiments |
Impact | several publications |
Description | R3B Collaboration (NUSTAR) |
Organisation | Facility for Antiproton and Ion Research |
Department | Nuclear Structure, Astrophysics and Reactions |
Country | Germany |
Sector | Public |
PI Contribution | Collaborative research/experiments. Leadership in design and construction of detection systems (e.g. Si Tracker and associated EDAQ). Data analysis and monte carlo simulations (supervision of PhD students), scientific input (experimental proposals, authorship of publications...). Manpower (technical and research staff, PhD students) for construction of equipment and running experiments.. Presentations at collaboration meetings, workshops, conferences. |
Collaborator Contribution | Access to research large-scale facility and beam time, technical support, PhD students and research staff, etc. T. Aumann spokesperson of R3B collaboration. |
Impact | Publications. PhD theses (S. Paschalis, J. Taylor). Training of PhD students and research staff. Invitations to speak at meetings, workshops, conferences. Project leadership of Si tracker (NUSTAR-UK project grant). |
Description | R3B Collaboration (NUSTAR) |
Organisation | Facility for Antiproton and Ion Research |
Country | Germany |
Sector | Private |
PI Contribution | Collaborative research/experiments. Leadership in design and construction of detection systems (e.g. Si Tracker and associated EDAQ). Data analysis and monte carlo simulations (supervision of PhD students), scientific input (experimental proposals, authorship of publications...). Manpower (technical and research staff, PhD students) for construction of equipment and running experiments.. Presentations at collaboration meetings, workshops, conferences. |
Collaborator Contribution | Access to research large-scale facility and beam time, technical support, PhD students and research staff, etc. T. Aumann spokesperson of R3B collaboration. |
Impact | Publications. PhD theses (S. Paschalis, J. Taylor). Training of PhD students and research staff. Invitations to speak at meetings, workshops, conferences. Project leadership of Si tracker (NUSTAR-UK project grant). |
Description | R3B Collaboration (NUSTAR) |
Organisation | Helmholtz Association of German Research Centres |
Department | GSI Helmholtz Centre for Heavy Ion Research |
Country | Germany |
Sector | Public |
PI Contribution | Collaborative research/experiments. Leadership in design and construction of detection systems (e.g. Si Tracker and associated EDAQ). Data analysis and monte carlo simulations (supervision of PhD students), scientific input (experimental proposals, authorship of publications...). Manpower (technical and research staff, PhD students) for construction of equipment and running experiments.. Presentations at collaboration meetings, workshops, conferences. |
Collaborator Contribution | Access to research large-scale facility and beam time, technical support, PhD students and research staff, etc. T. Aumann spokesperson of R3B collaboration. |
Impact | Publications. PhD theses (S. Paschalis, J. Taylor). Training of PhD students and research staff. Invitations to speak at meetings, workshops, conferences. Project leadership of Si tracker (NUSTAR-UK project grant). |
Description | TASCA Collaboration |
Organisation | GSI |
Department | KP |
Country | Ireland |
Sector | Public |
PI Contribution | Parts of the detection system, Manpower, Data Analysis, Monte Carlo Simulation, Intellectual Input |
Collaborator Contribution | Technical Support for Experiment |
Impact | Confirmation of Element 114 and New isotope 277Hs (Duellmann et al, PRL 104 2010 252701) Spectroscopy of 253No (Anderson et al, NIMA622 2010 164) |
Start Year | 2006 |
Description | TASCA Collaboration |
Organisation | Helmholtz Association of German Research Centres |
Department | Helmholtz Institute Mainz |
Country | Germany |
Sector | Academic/University |
PI Contribution | Parts of the detection system, Manpower, Data Analysis, Monte Carlo Simulation, Intellectual Input |
Collaborator Contribution | Technical Support for Experiment |
Impact | Confirmation of Element 114 and New isotope 277Hs (Duellmann et al, PRL 104 2010 252701) Spectroscopy of 253No (Anderson et al, NIMA622 2010 164) |
Start Year | 2006 |
Description | TASCA Collaboration |
Organisation | Johannes Gutenberg University of Mainz |
Department | Institute for Nuclear Chemistry |
Country | Germany |
Sector | Academic/University |
PI Contribution | Parts of the detection system, Manpower, Data Analysis, Monte Carlo Simulation, Intellectual Input |
Collaborator Contribution | Technical Support for Experiment |
Impact | Confirmation of Element 114 and New isotope 277Hs (Duellmann et al, PRL 104 2010 252701) Spectroscopy of 253No (Anderson et al, NIMA622 2010 164) |
Start Year | 2006 |
Description | BBC Atom |
Form Of Engagement Activity | A press release, press conference or response to a media enquiry/interview |
Part Of Official Scheme? | No |
Primary Audience | Public/other audiences |
Results and Impact | Scientific Advisor to the BBC "Atom" Series presented by Jim Al-Khalili Greater public awareness of Superheavy Element Research |
Year(s) Of Engagement Activity | 2008 |
Description | Froehlich Lecture |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Primary Audience | Participants in your research |
Results and Impact | 100 members of the Physics and Chemistry departments in Liverpool including 20-30 undergraduate students attended. We had a lively discussion. Greater awareness of Superheavy Element Research in the School of Physical Sciences (Physics, Chemistry, Maths) |
Year(s) Of Engagement Activity | 2010 |
Description | Nuclear Physics Master Class |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Type Of Presentation | Keynote/Invited Speaker |
Geographic Reach | Regional |
Primary Audience | Schools |
Results and Impact | About 10-20 six-formers attended practical activities and presentations over a number of days, including discussions in the Q&A part of the presentations. None, it is hoped that the activities raise the awareness of the impact of Nuclear Physics on daily life. |
Year(s) Of Engagement Activity | 2012,2013,2014 |
Description | PHYSOC Lecture |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Primary Audience | Schools |
Results and Impact | ~40 undergraduate physics students attended and lively debate ensued. Several people have expressed an interest to do a PhD with me on this subject. |
Year(s) Of Engagement Activity | 2009,2010 |
Description | Teachers Conference |
Form Of Engagement Activity | Participation in an open day or visit at my research institution |
Part Of Official Scheme? | Yes |
Primary Audience | Schools |
Results and Impact | ~20 teachers attended and we had good discussions about science and public engagement. None |
Year(s) Of Engagement Activity | 2010 |