BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Pathways of radiotracer development for PEPT DTSTART;VALUE=DATE-TIME:20190319T130000Z DTEND;VALUE=DATE-TIME:20190319T131500Z DTSTAMP;VALUE=DATE-TIME:20260912T081626Z UID:indico-contribution-265-1320@indico.tlabs.ac.za DESCRIPTION:Speakers: Michael van Heerden (University of Cape Town)\nPEPT Cape Town is a dedicated research centre focused on measuring the underlyi ng \nphysics of opaque multiphase flow systems. The basis of this nuclear \nmeasurement technique hinges on how accurate and representative the \ntr acer particle is of the media of interest in these dynamic applications. \ nThis presentation will report the current state of tracer particle \ntech niques and the areas of active radiochemical tracer development for \nfutu re applications in PEPT.\n\nhttps://indico.tlabs.ac.za/event/82/contributi ons/1320/ LOCATION:J Block Auditorium URL:https://indico.tlabs.ac.za/event/82/contributions/1320/ END:VEVENT BEGIN:VEVENT SUMMARY:Producing a standard thoron source. DTSTART;VALUE=DATE-TIME:20190318T100000Z DTEND;VALUE=DATE-TIME:20190318T103000Z DTSTAMP;VALUE=DATE-TIME:20260912T081626Z UID:indico-contribution-265-1322@indico.tlabs.ac.za DESCRIPTION:Speakers: Robbie Lindsay (UWC)\nThoron (Rn-220) is the radon i sotope with a shorter half-life (55 s) than the better known Rn-222. Thor on has been identified as a possible health concern in specific places suc h as monazite processing plants and (rare-earth) mines. The short half-lif e of thoron (55.8 s) makes thoron calibration sources and thoron chambers less common than the corresponding radon ones. We have developed a an ine xpensive and straight forward but accurate standard thoron source that can be set up easily in typical nuclear environmental laboratories. The so urce of thoron is a solution of Th(NO3)4 in water. Thoron is extracted by bubbling air through the solution using an aerator. The gamma rays from the solution are measured at the same time. The thoron activity concentra tion in the exit stream follows from the reduction in the intensity of the gamma rays from the progeny of thoron over time.\n\nhttps://indico.tlabs. ac.za/event/82/contributions/1322/ LOCATION:J Block Auditorium URL:https://indico.tlabs.ac.za/event/82/contributions/1322/ END:VEVENT BEGIN:VEVENT SUMMARY:Positron Emission Particle Tracking: towards Principled Education\ , Physics and Technology DTSTART;VALUE=DATE-TIME:20190318T103000Z DTEND;VALUE=DATE-TIME:20190318T110000Z DTSTAMP;VALUE=DATE-TIME:20260912T081626Z UID:indico-contribution-265-1321@indico.tlabs.ac.za DESCRIPTION:Speakers: Thomas Leadbeater (University of Cape Town)\nWe use advanced nuclear measurement techniques to study the fundamental physics o f material flows and the dynamics of physical systems. At the previous ANS TT meeting we presented a research strategy broadly aligned to the scienti fic programme. We now present developments over the past year\, including new high speed data acquisition systems\, machine learning explorations\, and novel radioisotope techniques specific to iThemba LABS. We will provid e an update on our laboratory's role in personnel development and training \, and offer thoughts towards the use of our facility for metrology applic ations.\n\nhttps://indico.tlabs.ac.za/event/82/contributions/1321/ LOCATION:J Block Auditorium URL:https://indico.tlabs.ac.za/event/82/contributions/1321/ END:VEVENT BEGIN:VEVENT SUMMARY:Measure it! Nuclear science and the science of measurement DTSTART;VALUE=DATE-TIME:20190318T120000Z DTEND;VALUE=DATE-TIME:20190318T123000Z DTSTAMP;VALUE=DATE-TIME:20260912T081626Z UID:indico-contribution-265-1324@indico.tlabs.ac.za DESCRIPTION:Speakers: Andy Buffler (UCT)\nI will explore the growing relat ionship between measurement in nuclear science and the science of measurem ent. In recent times metrology is relying more on fundamental science and in November 2018 the SI units were redefined with direct traceability to t he fundamental constants of nature. I will illustrate how metrology in pla ying a more central role in nuclear physics\, including at iThemba LABS\, and discuss the research domains of the Metrological and Applied Sciences Research Unit (MeASURe) within the Department of Physics at UCT.\n\nhttps: //indico.tlabs.ac.za/event/82/contributions/1324/ LOCATION:J Block Auditorium URL:https://indico.tlabs.ac.za/event/82/contributions/1324/ END:VEVENT BEGIN:VEVENT SUMMARY:Sub-Millimetre Particle Tracking Using PEPT with the PolarisJ Semi conductor Array DTSTART;VALUE=DATE-TIME:20190319T131500Z DTEND;VALUE=DATE-TIME:20190319T133000Z DTSTAMP;VALUE=DATE-TIME:20260912T081626Z UID:indico-contribution-265-1319@indico.tlabs.ac.za DESCRIPTION:Speakers: Nicholas Hyslop ()\nThe Positron Emission Particle T racking (PEPT) technique has been in development in Cape Town since 2009\, and allows one to track a 1mm positron-emitting point source travelling a t 1m/s to within 1mm\, 1000 times a second. Typically\, this utilises a la rge\, high efficiency scintillation detector like BGO. However\, recent ex periments have shown that high resolution\, relatively high efficiency sem iconductor (CdZnTe) detectors\, which are usually used in prompt gamma-ray detection during proton radiotherapy\, are able to track particles down t o sub-millimetre precision. We have been using the PolarisJ detectors to d evelop the PEPT technique\, and hope to use them to track particles in mic ro-scale fluid dynamics applications. Initial measurements have been able to locate a $^{22}$Na button source in three-dimensional space with an unc ertainty of 0.11mm and a signal-to-noise ratio of 85%. This is a promising first step towards tracking micrometre-sized particles with sub-millimetr e accuracy.\n\nhttps://indico.tlabs.ac.za/event/82/contributions/1319/ LOCATION:J Block Auditorium URL:https://indico.tlabs.ac.za/event/82/contributions/1319/ END:VEVENT BEGIN:VEVENT SUMMARY:Prompt Gamma Imaging: Verifying Proton Therapy Treatment Dose DTSTART;VALUE=DATE-TIME:20190319T120000Z DTEND;VALUE=DATE-TIME:20190319T123000Z DTSTAMP;VALUE=DATE-TIME:20260912T081626Z UID:indico-contribution-265-1328@indico.tlabs.ac.za DESCRIPTION:Speakers: Steve Peterson (University of Cape Town)\nPrompt Gam ma Imaging (PGI) focuses on the detection of secondary (prompt) gammas dur ing a proton therapy treatment. With the use of a Compton camera\, PGI is working to create an in-vivo image of the dose deposited within the patie nt as a dose verification system. I will present the UCT PGI detection sy stem and the current work being performed. I will also discuss the next s teps towards the development of PGI and our role in the larger project to develop a complete clinical system.\n\nhttps://indico.tlabs.ac.za/event/82 /contributions/1328/ LOCATION:J Block Auditorium URL:https://indico.tlabs.ac.za/event/82/contributions/1328/ END:VEVENT BEGIN:VEVENT SUMMARY:Monitoring of targets for radionuclide production DTSTART;VALUE=DATE-TIME:20190319T123000Z DTEND;VALUE=DATE-TIME:20190319T130000Z DTSTAMP;VALUE=DATE-TIME:20260912T081626Z UID:indico-contribution-265-1326@indico.tlabs.ac.za DESCRIPTION:Speakers: Paul Papka (Stellenbosch University)\nDirect monitor ing of targets for isotope production implies harsh conditions with large neutron and gamma fields. These have implications on the type of instrumen t to use and how to extract information. Micro fission pocket detectors fo r nuclear power generation applications\, for example\, can sustain neutro n fluxes in the order of 1014n/cm2/s or more. This makes them suitable to quantify neutron/gamma fluxes in real time but spectroscopic information i s not accessible. An alternative was implemented at iThemba LABS to monit or leakage of radionuclide within the water cooling system. Water is sampl ed after the bombardment target and circulated in front of a germanium det ector. Even though the conditioning and transport of water imply delays\, the specific transition lines identified in the gamma spectrum allow for f ine diagnostics of the bombardment targets. This can be used to deduce the type of target being bombarded\, monitor its condition and identify anoma lous leakage. Ultimately\, this can also be used to measure the integrated number of projectiles complementary to indirect beam current measurement using non destructive probes.\n\nhttps://indico.tlabs.ac.za/event/82/contr ibutions/1326/ LOCATION:J Block Auditorium URL:https://indico.tlabs.ac.za/event/82/contributions/1326/ END:VEVENT BEGIN:VEVENT SUMMARY:Primary Activity Standards and Nuclear Data for Targeted Alpha The rapy DTSTART;VALUE=DATE-TIME:20190318T080000Z DTEND;VALUE=DATE-TIME:20190318T083000Z DTSTAMP;VALUE=DATE-TIME:20260912T081626Z UID:indico-contribution-265-1327@indico.tlabs.ac.za DESCRIPTION:Speakers: John Keightley (National Physical Laboratory)\nTarge ted alpha therapy is a rapidly evolving discipline\, referring to an emerg ing class of revolutionary cancer agents delivering alpha-particle-emittin g radiopharmaceuticals selectively to cancerous lesions via attachment to appropriate ligands and carriers. \n\nClinically effective alpha particle –emitting radionuclides for cancer therapy exhibit short half-lives\, (l imiting long-term radiation exposure to patients) and exhibit a high level of radiobiological effectiveness (due to the high-energy and short-range of the alpha radiation) thus limiting damage to non-cancerous surrounding tissue.\n\nThe calculation of the absorbed dose delivered to malignant and surrounding normal tissue is a key parameter in optimising the effectiven ess of these treatment modalities\, requiring accurate assessment of the a ctivity administered to patients (via demonstrable traceability of clinica l Dose Calibrator assay to primary activity standards) as well improvement s in the knowledge of radioactive decay scheme parameters/nuclear data for the radionuclides employed.\n\nThis report reviews the current status of measurement and standardisation needs for Targeted Alpha Therapy\, and det ails recent work performed at the United Kingdom’s National Physical Lab oratory (and worldwide)\, to address these key measurement issues for the Targeted Alpha Therapy radiopharmaceuticals 223Ra\, 227Th and 224Ra each o f which may be considered as the parent of a radioactive decay-chain. The nuances of radioactive decay (and associated progeny ingrowth) for each ra dionuclide on activity measurements (for primary and secondary standardisa tions\, as well as clinical use) are detailed.\n\nhttps://indico.tlabs.ac. za/event/82/contributions/1327/ LOCATION:J Block Auditorium URL:https://indico.tlabs.ac.za/event/82/contributions/1327/ END:VEVENT BEGIN:VEVENT SUMMARY:Commissioning the DT neutron facility at the University of Cape To wn DTSTART;VALUE=DATE-TIME:20190318T083000Z DTEND;VALUE=DATE-TIME:20190318T090000Z DTSTAMP;VALUE=DATE-TIME:20260912T081626Z UID:indico-contribution-265-1325@indico.tlabs.ac.za DESCRIPTION:Speakers: Tanya Hutton (University of Cape Town)\nA new fast n eutron facility has been established within the Metrological Applied Scien ces University Research Unit (MeASURe) located in the Department of Physic s at the University of Cape Town. The facility features a D-T sealed tube neutron generator within a bunker which can produce a well-collimated beam of 14 MeV neutrons suitable for a wide variety of applications\, includin g cross section measurements\, elemental analyses of materials in bulk\, a nd neutron detector characterization and calibrations.\n\nWe introduce the facility\, and how it is situated within the field of neutron metrology. We detail the existing infrastructure\, both physical and computational\, and present experimental characterisations of neutron yields\, energy spec tra and beam profiles. Current and future applications will be discussed.\ n\nhttps://indico.tlabs.ac.za/event/82/contributions/1325/ LOCATION:J Block Auditorium URL:https://indico.tlabs.ac.za/event/82/contributions/1325/ END:VEVENT BEGIN:VEVENT SUMMARY:The Ionising Radiation related activities at NMISA DTSTART;VALUE=DATE-TIME:20190318T073000Z DTEND;VALUE=DATE-TIME:20190318T080000Z DTSTAMP;VALUE=DATE-TIME:20260912T081626Z UID:indico-contribution-265-1316@indico.tlabs.ac.za DESCRIPTION:Speakers: Zakithi Msimang (NMISA)\nNMISA supports the South Af rican industry with measurement traceability and measurement solutions. Th e ionising radiation division has dosimetry and radioactivity laboratories and recently has introduced capabilities for performing measurement audit s at radiotherapy centres. The presentation will look at different program mes and projects currently running at these laboratories.\n\nhttps://indic o.tlabs.ac.za/event/82/contributions/1316/ LOCATION:J Block Auditorium URL:https://indico.tlabs.ac.za/event/82/contributions/1316/ END:VEVENT BEGIN:VEVENT SUMMARY:A study to investigate the use of natural radionuclides as radiotr acers in sedimentation processes DTSTART;VALUE=DATE-TIME:20190318T130000Z DTEND;VALUE=DATE-TIME:20190318T133000Z DTSTAMP;VALUE=DATE-TIME:20260912T081626Z UID:indico-contribution-265-1317@indico.tlabs.ac.za DESCRIPTION:Speakers: Jacques Bezuidenhout ()\nThe natural occurring radio nuclides of thorium\, uranium and potassium is present in varying concentr ations in all rocks and sand. Natural radionuclides can therefore be a goo d tool when studying sediment characteristics. The uranium nuclide usually has the lowest activity concentrations\, and potassium by far the highest concentrations. Natural radionuclide concentrations were consequently acq uired and mapped by means of in situ measurements at various locations. Th ese locations included beaches\, pans and rivers in South Africa\, Mozambi que\, Botswana and Namibia. The distribution of the naturally radionuclide s demonstrated good agreement with the geophysical characteristics of the areas which includes underlying sedimentation processes. These studies als o showed that radionuclide mapping provides valuable information on beach formation and erosion. \n\nBlack sand that contain high levels of heavy mi nerals were also gathered from some of the sites and analysed. Uranium and thorium concentrations in excess of 550 Bq/kg and 950 Bq/kg\, respectivel y\, were measured. Very low concentrations of potassium were however detec ted in the black sand. These exceptionally high levels of radionuclides ga ve rise to the idea that black sand can be used as a natural radiotracer w hen studying sediment transport. This article will explore the possible ut ilization of natural thorium and uranium in black sand as radiotracers.\n\ nhttps://indico.tlabs.ac.za/event/82/contributions/1317/ LOCATION:J Block Auditorium URL:https://indico.tlabs.ac.za/event/82/contributions/1317/ END:VEVENT BEGIN:VEVENT SUMMARY:Excited State Lifetime Nuclear Metrology: Precision Half-life Meas urements in 164Dy and 166Dy and Reaction Channel Selection Techniques usin g the NuBALL Spectrometer DTSTART;VALUE=DATE-TIME:20190318T123000Z DTEND;VALUE=DATE-TIME:20190318T130000Z DTSTAMP;VALUE=DATE-TIME:20260912T081626Z UID:indico-contribution-265-1351@indico.tlabs.ac.za DESCRIPTION:Speakers: Patrick Regan (University of Surrey &\; The Natio nal Physical Laboratory\, UK)\nResults are presented from the first in-bea m experiment using the NuBALL hybrid HPGe-LaBr3 gamma-ray spectrometer at IPN\, Orsay\, performed in November 2017\, with the physics aim of determi ning the electromagnetic transition rates to the ground state of the N=100 nucleus 166Dy. In this first configuration\, the NuBALL spectrometer comp rised 24 Compton suppressed HPGe Clover detectors\, 10 coaxial HPGe Compto n suppressed spectrometers\, and 20 single-element LaBr3 detectors supplie d by the FATIMA and UK Nuclear Data Network collaborations. These detector s were read out using a fully-digital data acquisition system. Excited sta tes in 166Dy were populated via the 164Dy(18O\,16O)166Dy two-neutron trans fer reaction using a 6.3 mg/cm2 164Dy gold-backed target of 95% purity and a pulsed 18O beam with energies of 71\, 76 and 80 MeV provided by the tan dem Van de Graaff accelerator at IPN Orsay. The ultimate physics goals of this work are to determine excited state lifetimes in the vicinity of the valence maximum nucleus 170Dy104 [1]\, using the HPGe-gated\, LaBr3-LaBr3 fast-timing time-difference technique. The states identified as populated in 166Dy are compared with results from previous spectroscopic studies of this quadrupole deformed nucleus\, using deep-inelastic reactions to popul ate high-spin cascades [2\,3]\, and (t\,p) transfer reactions on 164Dy [4 ] and β-decay from 166Tb [5] which are more selective for lower-spin stat es. A value for the previously unknown half-life of the first excited 2+ s tate in 166Dy is presented. Values for the half-lives of the first excited 2+ and 4+ states in 164Dy are also presented\, obtained from direct gamma -gamma time differences for the first time [6]. Methods of channel selecti on used to enhance the peak-to-total ratio for the 166Dy and to discrimina te these from the 178W populated via the competing fusion-evaporation chan nel [7\,8] will be demonstrated. In particular\, the effects of total ener gy-total gamma multiplicity and prompt-delayed coincidence timing will be discussed.\n\n[1] P-A. Söderström et al.\, Phys. Lett. B762\, 404 (2016) \n[2] P-A Söderström et al.\, Phys. Rev. C81\, 034310 (2010)\n[3] C.Y. Wu et al.\, Phys. Rev. C57\, 346 (1998)\n[4] D.G. Burke et al.\, Nucl. Phy s. A483\, 221 (1988)\n[5] S. Ichikawa et al.\, Nucl. Inst. Meth. Phys. Res . A374\, 330 (1996)\n[6] B. Singh et al. Nuclear Data Sheets 147\, 1 (2018 )\n[7] M. Rudigier et al.\, Nucl. Phys. A847\, 89 (2010)\n[8] C.S. Purry et al.\, Nucl. Phys. A632\, 229 (1998)\n\n\n This work is partially suppo rted by grants from the UK Science and Technology Facilities Council (STFC )\; the UK Government Department for Business\, Energy and Industrial Stra tegy (BEIS) via the National Measurement System (NMS)\; and the Marion Red fearn Trust.\n\nhttps://indico.tlabs.ac.za/event/82/contributions/1351/ LOCATION:J Block Auditorium URL:https://indico.tlabs.ac.za/event/82/contributions/1351/ END:VEVENT END:VCALENDAR