P. E. Garrett
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View article: Probing Low-energy States in \(^{110}\)Cd Using Coulomb Excitation
Probing Low-energy States in \(^{110}\)Cd Using Coulomb Excitation Open
A campaign of Coulomb-excitation experiments to study the electromagnetic structure of \(^{110}\)Cd was performed using beams of \(^{14}\)N, \(^{32}\)S, and \(^{60}\)Ni. The use of various reaction partners enables disentangling the contri…
View article: A \(\beta \)-decay Study of the Low-spin Structure of \(^{98}\)Zr
A \(\beta \)-decay Study of the Low-spin Structure of \(^{98}\)Zr Open
A high-statistics \(\beta \)-decay experiment was conducted at the TRIUMF-ISAC facility using the \(8\pi \) \(\gamma \)-ray spectrometer and its ancillary detectors to study the low-spin structure of \(^{98}\)Zr. The analysis of \(\gamma \…
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: Unveiling New States in <sup>98</sup>Zr: Insights from <i>β</i>-decay and <i>γ-γ</i> Angular-Correlation Studies
Unveiling New States in <sup>98</sup>Zr: Insights from <i>β</i>-decay and <i>γ-γ</i> Angular-Correlation Studies Open
The nuclear structure of the 98 Zr nucleus was studied through the β − decay of 98 Y g.s. at the TRIUMF-ISAC facility. The use of the 8π γ-ray spectrometer with its ancillary detectors SCEPTAR and PACES enabled γ-γ and γ-e − coincidence me…
View article: β-decay studies for shape coexistence
β-decay studies for shape coexistence Open
decay has played a key role in studies of shape coexistence throughout the nuclear chart. This has been mainly due to the sensitivity in -ray and conversion electron spectroscopy that can be achieved following the population of excited s…
View article: Study of the mass and ch arge distribution of fragments from induced by intermediate energy neutrons on uranium 238
Study of the mass and ch arge distribution of fragments from induced by intermediate energy neutrons on uranium 238 Open
Prompt gamma-ray and x-ray spectroscopy techniques are being employed to study fission induced on {sup 238}U targets by neutrons of energy from 1 MeV to 150 MeV. Data are acquired using the GEANIE high resolution gamma-ray spectrometer at …
View article: Nuclear modeling of (n, x, [gamma]) reactions and determination of partial cross sections
Nuclear modeling of (n, x, [gamma]) reactions and determination of partial cross sections Open
This talk would describe nuclear reaction modeling work in collaboration with experimental measurements at Los Alamos' GEANIE array. The GEANIE array is able to measure discrete gamma-rays in the deexcitation of residual nuclei produced fo…
View article: Feeding of the 1 1/2- isomers in stable Ir and Au isotopes
Feeding of the 1 1/2- isomers in stable Ir and Au isotopes Open
Excited states were studied and absolute partial {gamma}-ray cross sections were measured using the ({eta}, {eta}'{gamma}) reaction in {sup 191}Ir, {sup 193}Ir and {sup 197}Au. A Compton-suppressed germanium-detector array (GEANIE) for {ga…
View article: Investigations of the structures of the Ru isotopes: <sup>98</sup>Ru
Investigations of the structures of the Ru isotopes: <sup>98</sup>Ru Open
As part of a systematic study of the nuclear structure of the Ru isotopes, 98 Ru was investigated via the β-decay of 98 Rh at iThemba LABS, and the 100 Ru( p, t ) reaction at the Maier-Leibnitz Laboratory. The combined data results in sign…
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: Alignment delays in the N = Z nuclei 72Kr, 76Sr, and 80Zr
Alignment delays in the N = Z nuclei 72Kr, 76Sr, and 80Zr Open
The ground state rotational bands of the N = Z nuclei 72Kr, 76Sr, and 80Zr have been extended into the angular momentum region where rotation alignment of particles is normally expected. By measuring the moments of inertia of these bands w…
View article: Isospin symmetry of odd-odd mirror nuclei: Identification of excited states in N=Z-2 Mn48
Isospin symmetry of odd-odd mirror nuclei: Identification of excited states in N=Z-2 Mn48 Open
Excited states have been observed in the N=Z-2 odd-odd nucleus Mn48 for the first time. Through comparison with the structure of V48, a first high-spin study of an odd-odd mirror pair has been achieved. Differences between the T=1 analogue…
View article: First Evidence of Axial Shape Asymmetry and Configuration Coexistence in $^{74}$Zn: Suggestion for a Northern Extension of the $N=40$ Island of Inversion
First Evidence of Axial Shape Asymmetry and Configuration Coexistence in $^{74}$Zn: Suggestion for a Northern Extension of the $N=40$ Island of Inversion Open
The excited states of $N=44$ $^{74}$Zn were investigated via $γ$-ray spectroscopy following $^{74}$Cu $β$ decay. By exploiting $γ$-$γ$ angular correlation analysis, the $2_2^+$, $3_1^+$, $0_2^+$ and $2_3^+$ states in $^{74}$Zn were firmly …
View article: $^{138}{\rm Ba}(d,α)$ study of states in $^{136}{\rm Cs}$: Implications for new physics searches with xenon detectors
$^{138}{\rm Ba}(d,α)$ study of states in $^{136}{\rm Cs}$: Implications for new physics searches with xenon detectors Open
We used the $^{138}$Ba$(d,α)$ reaction to carry out an in-depth study of states in $^{136}$Cs, up to around 2.5~MeV. In this work, we place emphasis on hitherto unobserved states below the first $1^+$ level, which are important in the cont…
View article: First direct measurement of $^{59}$Cu(p,$\alpha$)$^{56}$Ni: A step towards constraining the Ni-Cu cycle in the Cosmos.
First direct measurement of $^{59}$Cu(p,$\alpha$)$^{56}$Ni: A step towards constraining the Ni-Cu cycle in the Cosmos. Open
Reactions on the proton-rich nuclides drive the nucleosynthesis in Core-Collapse Supernovae (CCSNe) and in X-ray bursts (XRBs). CCSNe eject the nucleosynthesis products to the interstellar medium and hence are a potential inventory of p-nu…
View article: Gamma-ray production cross sections in multiple channels for neutron induced reaction on 48Ti for En=1 to 200 MeV
Gamma-ray production cross sections in multiple channels for neutron induced reaction on 48Ti for En=1 to 200 MeV Open
Prompt {gamma}-ray production cross sections were measured on a {sup 48}Ti sample for incident neutron energies from 1 MeV to 200 MeV. Partial {gamma}-ray cross sections for transitions in {sup 45-48}Ti, {sup 45-48}Sc, and {sup 43-45}Ca we…
View article: {sup 170}Er: The search for multiphonon vibrations in a rotational nucleus
{sup 170}Er: The search for multiphonon vibrations in a rotational nucleus Open
To search for candidates for 2-phonon vibrations, {sup 170}Er was studied with the inelastic neutron scattering reaction. The level scheme was extended using {gamma}{gamma} coincidences and excitation functions. Spins were deduced from ang…
View article: Soft radiative strength in warm nuclei
Soft radiative strength in warm nuclei Open
We present data on the soft (E{sub {gamma}} < 3-4 MeV) radiative strength function (RSF) for electromagnetic transitions between warm states (i.e. states several MeV above the yrast line) from two different types of experiments. The Osl…
View article: Spin distribution in neutron induced preequilibrium reactions
Spin distribution in neutron induced preequilibrium reactions Open
The preequilibrium reaction mechanism makes an important contribution to neutron-induced reactions above E{sub n} {approx} 10 MeV. The preequilibrium process has been studied exclusively via the characteristic high energy neutrons produced…
View article: Establishment of M1 multipolarity of a 6.5 (micro)2n resonance in 172Yb at E(gamma) = 3.3 MeV
Establishment of M1 multipolarity of a 6.5 (micro)2n resonance in 172Yb at E(gamma) = 3.3 MeV Open
Two-step-cascade spectra in {sup 172}Yb have been measured after thermal neutron capture. they are compared to calculations based on experimental values of the level density and radiative strength function (RSF) obtained from the {sup 173}…
View article: Multiple Shape Coexistence in <sup>110,112</sup>Cd and Beyond Mean Field Calculations
Multiple Shape Coexistence in <sup>110,112</sup>Cd and Beyond Mean Field Calculations Open
Detailed spectroscopy employing the β + /EC decay of 110,112 In and the β − decay of 112 Ag has been used to study the excited states of 110,112 Cd. Low-energy decay branches from highly excited states have been observed and, combined with…
View article: Collective 2p-2h intruder states in $^{118}$Sn studied via $β$-decay of $^{118}$In using GRIFFIN
Collective 2p-2h intruder states in $^{118}$Sn studied via $β$-decay of $^{118}$In using GRIFFIN Open
The low-lying structure of semi-magic $^{118}$Sn has been investigated through the $β$-decay of $^{118}$In ($T_{1/2}=4.45$ min) to study shape coexistence via the reduced transition probabilities of states in the 2p-2h proton intruder band…