Structure of Nuclei with Extreme Neutron/Proton Ratios
Lead Research Organisation:
University of Surrey
Department Name: Physics
Abstract
Neutron-rich nuclei to be studied will be produced in world leading facilities. The isotope-separation on-line technique will be used at CERN-ISOLDE, and projectile fission at RIKEN. In an already approved experiment at CERN-ISOLDE, the single magic radioactive nucleus 206Hg will be studied in low energy Coulomb excitation. The experiment is expected to provide information on the collectivity, both quadrupole and octupole, in this region. At RIKEN the nuclei of interest will be populated via secondary fragmentation of fission products, via beta decay and transfer reactions. The obtained level schemes will be used to refine nuclear theories and to increase their predictive power for even more exotic nuclei.
Organisations
Publications
Daniel T
(2017)
? -ray spectroscopy of low-lying excited states and shape competition in Os 194
in Physical Review C
Gamba E
(2018)
Fast-timing measurements in neutron-rich odd-mass zirconium isotopes using LaBr 3 :Ce detectors coupled with Gammasphere
in EPJ Web of Conferences
Gamba E
(2018)
Fast-timing Measurements in $^{100}$Zr Using LaBr$_{3}$(Ce) Detectors Coupled with Gammasphere
in Acta Physica Polonica B
Gurgi L
(2017)
Isomer spectroscopy of neutron-rich 168Tb103
in Radiation Physics and Chemistry
Gurgi L
(2017)
Isomer Spectroscopy of Neutron-rich $^{165,167}$Tb
in Acta Physica Polonica B
Gurgi L
(2017)
Isomer-delayed gamma-ray spectroscopy of neutron-rich 166 Tb
in EPJ Web of Conferences
Henrich C
(2018)
Coulomb Excitation of 142Xe
in Acta Physica Polonica B
Kirsebom O
(2017)
Improved experimental determination of the branching ratio for ß -delayed a decay of 16 N
in EPJ Web of Conferences
Kirsebom OS
(2018)
First Accurate Normalization of the ß-delayed a Decay of ^{16}N and Implications for the ^{12}C(a,?)^{16}O Astrophysical Reaction Rate.
in Physical review letters
Lica R
(2018)
Evolution of deformation in neutron-rich Ba isotopes up to A = 150
in Physical Review C
Lica R
(2017)
ß decay studies of n -rich Cs isotopes with the ISOLDE Decay Station
in Journal of Physics G: Nuclear and Particle Physics
Patel Z
(2017)
Isomer-delayed ? -ray spectroscopy of A = 159 - 164 midshell nuclei and the variation of K -forbidden E 1 transition hindrance factors
in Physical Review C
Piersa M
(2019)
ß decay of In 133 : ? emission from neutron-unbound states in Sn 133
in Physical Review C
Piersa M
(2018)
Investigation of Low-lying States in $^{133}$Sn Populated in the $\beta $ Decay of $^{133}$In Using Isomer-selective Laser Ionization
in Acta Physica Polonica B
Rosiak D
(2018)
Enhanced Quadrupole and Octupole Strength in Doubly Magic ^{132}Sn.
in Physical review letters
Rudigier M
(2017)
Fast Timing Measurement Using an LaBr$_3$(Ce) Scintillator Detector Array Coupled with Gammasphere
in Acta Physica Polonica B
Studentship Projects
Project Reference | Relationship | Related To | Start | End | Student Name |
---|---|---|---|---|---|
ST/N504440/1 | 30/09/2015 | 30/03/2021 | |||
1651929 | Studentship | ST/N504440/1 | 30/09/2015 | 31/03/2019 | Thomas Berry |
Description | The research has significantly improved our knowledge of the low-energy excited states in the 207Tl nucleus. It has revealed more information on the behaviour of the collective vibrational octupole phonon in this region of the nuclear chart by identifying states which occur as a result of the phonon. From these results, and those of previous experiments, we have attempted to answer why current state-of-the-art calculations systematically underestimate the phonon energy. A clear example of a rarely-observed beta-decay selection rule (the Delta(n)=0 rule) has also been observed for the first time and evaluated in detail. The rule has significance for beta-decay half-lives along the r-process pathway, which affects the astrophysical synthesis of heavy nuclei. Angular correlation measurements between gamma rays have been performed for the experimental setup for the first time in this analysis. This expands its capabilities and could support the proposal of future experiments using the technique. |
Exploitation Route | The conclusions from this work could be used to support further developments of shell model calculations in order to accurately describe the collective octupole phonon. If this is successful then it could greatly improve predictive capabilities in this region. Experimentally, the angular correlation method developed here should facilitate easier measurements of this kind in future. Several promising decays for further observation of the Delta(n)=0 rule are highlighted in this work. |
Sectors | Other |
Description | CERN@School |
Form Of Engagement Activity | Participation in an activity, workshop or similar |
Part Of Official Scheme? | No |
Geographic Reach | Regional |
Primary Audience | Schools |
Results and Impact | Participation in the CERN@School programme, working alongside the University's Outreach Officer in engaging nearby schoolchildren with particle physics through projects based around a CERN-developed radiation detector. This has involved travelling to the schools involved, demonstrating the use of the equipment, speaking to classes about the projects and applications of nuclear physics in general, and providing support and physics consultancy to the groups as they plan their projects. While there have been no significant projects as of yet, the students have gained hands-on experience of nuclear physics phenomena and the programme has also been improved using feedback from participants. |
Year(s) Of Engagement Activity | 2017,2018 |
URL | http://www.researchinschools.org/CERN/home.html |