A. B. Garnsworthy
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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: 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: Improved measurement of the $0_2^+\rightarrow0_1^+$ E0 transition strength for $^{72}$Se using the SPICE spectrometer
Improved measurement of the $0_2^+\rightarrow0_1^+$ E0 transition strength for $^{72}$Se using the SPICE spectrometer Open
The selenium isotopes lie at the heart of a tumultuous region of the nuclear chart where shape coexistence effects grapple with neutron-proton pairing correlations, triaxiality, and the impending proton dripline. In this work a study of $^…
View article: First application of Markov Chain Monte Carlo-based Bayesian data analysis to the Doppler-Shift Attenuation Method
First application of Markov Chain Monte Carlo-based Bayesian data analysis to the Doppler-Shift Attenuation Method Open
Motivated primarily by the large uncertainties in the thermonuclear rate of the $^{30}$P$(p,γ)^{31}$S reaction that limit our understanding of classical novae, we carried out lifetime measurements of $^{31}$S excited states using the Doppl…
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: Coulomb excitation of the $\left|T_z\right|=\frac{1}{2}$, $A=23$ mirror pair and systematics of ab-initio $E2$ strength
Coulomb excitation of the $\left|T_z\right|=\frac{1}{2}$, $A=23$ mirror pair and systematics of ab-initio $E2$ strength Open
Background: Recent developments in {\it ab initio} nuclear theory demonstrate promising results in medium- to heavy-mass nuclei. A particular challenge for many of the many-body methodologies, however, is an accurate treatment of the elect…
View article: Half-Lives of Neutron Rich $^{130}$Cd and $^{131}$In
Half-Lives of Neutron Rich $^{130}$Cd and $^{131}$In Open
The half-lives of isotopes around the $N=82$ shell closure are an important ingredient in astrophysical simulations and strongly influence the magnitude of the second $r$-process abundance peak in the $A\sim130$ region. The most neutron-ri…
View article: Advances at TRIUMF-ISAC and decay of neutron-rich Cd studied with GRIFFIN
Advances at TRIUMF-ISAC and decay of neutron-rich Cd studied with GRIFFIN Open
The β -decay half lives of nuclei near the r -process path are critical information required for abundance calculations, especially those near neutron number N = 82. Specifically, the nuclei below doubly-magic 132 Sn are key, and play an i…
View article: New low-spin states of <sup>122</sup>Xe observed via high-statistics <i>β</i>-decay of <sup>122</sup>Cs
New low-spin states of <sup>122</sup>Xe observed via high-statistics <i>β</i>-decay of <sup>122</sup>Cs Open
Excited states of 122 Xe were studied via the β + /EC decay of 122 Cs with the 8 π γ -ray spectrometer at the TRIUMF-ISAC facility. Compton-suppressed HPGe detectors were used for measurements of γ -ray intensities, γγ coincidences, and γ …
View article: Characteristics of GRIFFIN high-purity germanium clover detectors
Characteristics of GRIFFIN high-purity germanium clover detectors Open
The Gamma-Ray Infrastructure For Fundamental Investigations of Nuclei, GRIFFIN, is a new experimental facility for radioactive decay studies at the TRIUMF-ISAC laboratory. The performance of the 16 high-purity germanium (HPGe) clover detec…
View article: High-precision Half-life And Branching Ratio Measurements For Superallowed β+ Emitters At TRIUMF-ISAC
High-precision Half-life And Branching Ratio Measurements For Superallowed β+ Emitters At TRIUMF-ISAC Open
High precision measurements of the ft values for superallowed Fermi β transitions between J π = 0 + isobaric analogue states allow for stringent tests of the electroweak interaction described by the Standard Model. These transitions provid…
View article: First Results from Griffin Including The Half-lives Of 128-130Cd
First Results from Griffin Including The Half-lives Of 128-130Cd Open
Gamma-Ray Infrastructure For Fundamental Investigations of Nuclei (GRIFFIN) is a new high-efficiency $\gamma$-ray spectrometer for decay spectroscopy research with low-energy (20-60 keV) stopped radioactive beams from the Isotope Separator…
View article: The 3\(\alpha \) Process Studied Through Pair Conversion Transitions from the Hoyle State in <sup>12</sup>C
The 3\(\alpha \) Process Studied Through Pair Conversion Transitions from the Hoyle State in <sup>12</sup>C Open
The E0 and E2 pair transitions from the Hoyle state have been measured, with the aim of deducing the radiative width and 3α reaction rate by a new approach.The 3α process is the only way carbon is synthesised in stars and is a bottleneck i…
View article: In-beam study of 253No using the SAGE spectrometer
In-beam study of 253No using the SAGE spectrometer Open
\n The heavy actinide nucleus 253No (Z = 102) was studied using the (S)ilicon (A)nd (Ge)rmanium (SAGE) spectrometer allowing simultaneous in-beam $\\gamma$-ray and conversion electron spectroscopy at the accelerator laboratory of the Unive…
View article: Scattering of halo nuclei on heavy targets at energies around the Coulomb barrier: The case of <sup>11</sup>Be on <sup>197</sup>Au
Scattering of halo nuclei on heavy targets at energies around the Coulomb barrier: The case of <sup>11</sup>Be on <sup>197</sup>Au Open
V. Pesudo et al. -- 6 pags., 10 figs., 1 tab. -- Open Access funded by Creative Commons Atribution Licence 4.0
View article: SPectrometer for Internal Conversion Electrons (SPICE) at TRIUMF-ISAC
SPectrometer for Internal Conversion Electrons (SPICE) at TRIUMF-ISAC Open
\nA new ancillary detector, SPICE (SPectrometer for Internal Conversion Electrons) has been constructed and recently commissioned for use with radioactive ion beams at the TRIUMF-ISAC II facility. SPICE is designed to be operated in conjun…
View article: Nuclear structure of<sup>122</sup>Xe studied via high-statistics<i>β</i><sup>+</sup>/<i>EC</i>-decay
Nuclear structure of<sup>122</sup>Xe studied via high-statistics<i>β</i><sup>+</sup>/<i>EC</i>-decay Open
The nuclear structure of 122Xe has been investigated with measurements of the β+/EC decay of 122Cs with the 8 π γ-ray spectrometer at the TRIUMF-ISAC facility. The data collected have enabled the determination of relative B(E2) values of s…
View article: Electric Monopole Transition Strengths in<sup>62</sup>Ni
Electric Monopole Transition Strengths in<sup>62</sup>Ni Open
Excited states in 62Ni were populated with a (p, p') reaction using the 14UD Pelletron accelerator at the Australian National University. Electric monopole transition strengths, ρ2(E0), were measured through simultaneous detection of the i…