P. H. Regan
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View article: A Monte Carlo approach to optimising a primary collimator design using EGSnrc
A Monte Carlo approach to optimising a primary collimator design using EGSnrc Open
The primary collimator in a clinical linear accelerator (linac) plays a vital role in the radiation shielding of the machine. One objective of the collimation system is to reduce head leakage to less than 0.1 % relative to the dose on the …
View article: Electron-gamma decay spectroscopy of <sup>152</sup>Tb
Electron-gamma decay spectroscopy of <sup>152</sup>Tb Open
Terbium-152, decaying by electron capture and β + emission to 152 Gd with Q EC = 3990(40) keV and T 1/2 = 17.8784(95) h, shows promise in nuclear medicine. First-in-human trials have demonstrated its suitability for positron emission tomog…
View article: Impact of Newly Measured <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>β</mml:mi></mml:math>-Delayed Neutron Emitters around <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Ni</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>78</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math> on Light Element Nucleosynthesis in the Neutrino Wind Following a Neutron Star Merger
Impact of Newly Measured -Delayed Neutron Emitters around on Light Element Nucleosynthesis in the Neutrino Wind Following a Neutron Star Merger Open
Neutron emission probabilities and half-lives of 37 β-delayed neutron emitters from Ni75 to Br92 were measured at the RIKEN Nishina Center in Japan, including 11 one-neutron and 13 two-neutron emission probabilities and six half-lives for …
View article: A Comprehensive Workflow for Imaging Live Insulin Secretion Events and Granules in Intact Islets
A Comprehensive Workflow for Imaging Live Insulin Secretion Events and Granules in Intact Islets Open
Accurate detection of insulin secretion from pancreatic beta cells is crucial for understanding normal physiological insulin secretion and its pathophysiological counterpart in diabetic states. Traditional methods using fluorescently label…
View article: Lifetime measurements in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Mo</mml:mi><mml:mprescripts/><mml:none/><mml:mn>102</mml:mn></mml:mmultiscripts></mml:math> interpreted in the interacting boson model and the X(5) symmetry
Lifetime measurements in interpreted in the interacting boson model and the X(5) symmetry Open
Lifetimes of low-lying excited states in Mo102 populated in the two-neutron transfer reaction Mo100(O18,O16)Mo102 were measured using the recoil distance Doppler shift method at the IFIN-HH Tandem accelerator. Lifetimes of the 21+, 02+, 41…
View article: Collective excitations in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Gd</mml:mi><mml:mprescripts/><mml:none/><mml:mn>150</mml:mn></mml:mmultiscripts></mml:math>
Collective excitations in Open
Mean lifetime measurements of low-lying yrast positive- and negative-parity states of Gd150 have been performed with the ROSPHERE array using the Ce140(C13,3n) fusion-evaporation reaction and the recoil distance Doppler shift method. Preci…
View article: Deformation and Collectivity in Doubly Magic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Pb</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>208</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>
Deformation and Collectivity in Doubly Magic Open
Lead-208 is the heaviest known doubly magic nucleus and its structure is therefore of special interest. Despite this magicity, which acts to provide a strong restorative force toward sphericity, it is known to exhibit both strong octupole …
View article: New readout system of the FATIMA detectors based on Silicon Photomultipliers arrays
New readout system of the FATIMA detectors based on Silicon Photomultipliers arrays Open
We present a new readout system based on large area Silicon Photomultipliers arrays coupled with cylindrical 1.5 × 2” LaBr 3 (Ce) FATIMA-type crystals. This readout achieves the fast-timing capabilities of such crystals coupled to the usua…
View article: Broken seniority symmetry in the semimagic proton mid-shell nucleus <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Rh</mml:mi><mml:mprescripts/><mml:none/><mml:mn>95</mml:mn></mml:mmultiscripts></mml:math>
Broken seniority symmetry in the semimagic proton mid-shell nucleus Open
Lifetime measurements of low-lying excited states in the semimagic (N=50) nucleus Rh95 have been performed by means of the fast-timing technique. The experiment was carried out using γ-ray detector arrays consisting of LaBr3(Ce) scintillat…
View article: Examination of how properties of a fissioning system impact isomeric yield ratios of the fragments
Examination of how properties of a fissioning system impact isomeric yield ratios of the fragments Open
The population of isomeric states in the prompt decay of fission fragments - so-called isomeric yield ratios (IYRs) - is known to be sensitive to the angular momentum J that the fragment emerged with, and may therefore contain valuable inf…
View article: Determination of the Terbium-152 half-life from mass-separated samples from CERN-ISOLDE and assessment of the radionuclide purity
Determination of the Terbium-152 half-life from mass-separated samples from CERN-ISOLDE and assessment of the radionuclide purity Open
Terbium-152 is one of four terbium radioisotopes that together form a potential theranostic toolbox for the personalised treatment of tumours. As 152 Tb decay by positron emission it can be utilised for diagnostics by positron emission tom…
View article: Decay Spectroscopy of $^{160}$Eu: Quasiparticle Configurations of\n Excited States and Structure of $K^\\pi$=$4^+$ Band-heads in $^{160}$Gd
Decay Spectroscopy of $^{160}$Eu: Quasiparticle Configurations of\n Excited States and Structure of $K^\\pi$=$4^+$ Band-heads in $^{160}$Gd Open
\\noindent \\textbf{Background:} Detailed spectroscopy of neutron-rich, heavy,\ndeformed nuclei is of broad interest for nuclear astrophysics and nuclear\nstructure. Nuclei in the r-process path and following freeze-out region impact\nthe …
View article: Nuclear structure aspects of the heaviest N∼Z nuclei south of <sup>100</sup>Sn
Nuclear structure aspects of the heaviest N∼Z nuclei south of <sup>100</sup>Sn Open
Ever-lasting interest in the structure of 100 Sn and neighbouring nuclei is still well justified by the fact that it is the heaviest doubly-magic nucleus with N=Z. State-of-the-art experimental techniques involving stable and radioactive b…
View article: Angular distributions of rays from 210bi produced in 208 pb+208pb deep-inelastic reactions
Angular distributions of rays from 210bi produced in 208 pb+208pb deep-inelastic reactions Open
The high-spin yrast structure of the 210Bi nucleus was investigated using -ray coincidence spectroscopy following deep-inelastic reactions in the 208Pb+208Pb system. Cascades of rays following the decay of a new isomer were identified. Spi…
View article: Fast-timing Measurement in \(^{96}\)Pd: Improved Accuracy for the Lifetime of the \(4_1^{+}\) State
Fast-timing Measurement in \(^{96}\)Pd: Improved Accuracy for the Lifetime of the \(4_1^{+}\) State Open
Direct lifetime measurements via \(\gamma \)–\(\gamma \) coincidences using the FATIMA fast-timing LaBr\(_{3}\)(Ce) array were performed for the excited states below previously reported isomers. In the \(N=50\) semi-magic \(^{96}\)Pd nucle…
View article: Isomeric Lifetime Measurement in the Neutron-rich <sup>189</sup>Ta
Isomeric Lifetime Measurement in the Neutron-rich <sup>189</sup>Ta Open
Isomeric states of the neutron-rich isotope 189 73 Ta 116 were populated via fragmentation of a primary beam of 208 Pb ions at 1 GeV/u impinging on a 9 Be target at GSI, Darmstadt, Germany. The isotopes of interest were separated, identifi…
View article: Spectroscopy of 91Zr51 at medium to high spins
Spectroscopy of 91Zr51 at medium to high spins Open
Identification of near-yrast states in the β-stable nucleus 91Zr51 has been carried out using the fusion evaporation reaction, 82Se(13C,4n)91Zr at an incident beam energy of 50 MeV. States above the reported r = 6 μs, Iπ = 21/2+ isomeric l…
View article: Direct Measurement of Carbon Fusion at Astrophysical Energies with Gamma-Particle Coincidences
Direct Measurement of Carbon Fusion at Astrophysical Energies with Gamma-Particle Coincidences Open
We present 12 C+ 12 C direct fusion measurements with STELLA UKFATIMA, that reach into the region of astrophysics interest relevant to massive stars ( M ⊙ ≈ 25) using self-supporting thin rotating carbon foils [1]. We demonstrate that dete…