P. Copp
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View article: High-spin spectroscopy and the onset of quasicollective structures in $^{69}$Ga
High-spin spectroscopy and the onset of quasicollective structures in $^{69}$Ga Open
The intermediate- and high-spin level structure of the odd-$A$ $^{69}$Ga nucleus was investigated via the $^{26}$Mg($^{48}$Ca, $p4nγ$) fusion evaporation reaction at a beam energy of 195 MeV. The experiment was performed using the Gammasph…
View article: Structure of beta-decaying states in the deformed, neutron-rich nucleus <sup>104</sup>Nb
Structure of beta-decaying states in the deformed, neutron-rich nucleus <sup>104</sup>Nb Open
Excited structures in 104 Mo were populated by β decays of the ground and isomeric states in the neutron-rich nucleus 104 Nb. The beams were produced by the CARIBU facility at Argonne National Laboratory, re-accelerated by the ATLAS accele…
View article: High-precision Measurement of the 16O(n,n′γ) Cross Section using γ-ray Detection in Liquid Scintillators with H2O and BeO Targets
High-precision Measurement of the 16O(n,n′γ) Cross Section using γ-ray Detection in Liquid Scintillators with H2O and BeO Targets Open
The 16O($n, n'γ$) reaction was measured at the Los Alamos Neutron Science Center white neutron source using γ-ray detection in liquid scintillators present in the upper hemisphere of the Correlated Gamma-Neutron Array for sCattering (CoGNA…
View article: Measurement of the Prompt Fission Neutron Spectrum from 800 keV to 10 MeV for <sup>240</sup>Pu($sf$) and for the <sup>240</sup>Pu($n,f$) Reaction Induced by Neutrons of Energy from 1-20 MeV
Measurement of the Prompt Fission Neutron Spectrum from 800 keV to 10 MeV for <sup>240</sup>Pu($sf$) and for the <sup>240</sup>Pu($n,f$) Reaction Induced by Neutrons of Energy from 1-20 MeV Open
The presence of 240Pu in nuclear fuels for reactors has resulted in high uncertainties in the results of reactor and nuclear transmutation calculations because of deficiencies in 240Pu-related nuclear data. Specifically for the prompt fiss…
View article: Resolving Neutron Transport with the CoGNAC Neutron Scattering Program at LANSCE [Poster]
Resolving Neutron Transport with the CoGNAC Neutron Scattering Program at LANSCE [Poster] Open
Neutron Scattering Defines Neutron Transport. Elastic (n,n) and inelastic (n,n'γ) reactions dictate the neutronic energy flow. Each scattering reaction changes neutron direction $\\vartheta$ and energy E. Scattering cross sections and angu…
View article: Structure of the high-spin, β-decaying state in the neutron-rich nucleus <sup>146</sup>La
Structure of the high-spin, β-decaying state in the neutron-rich nucleus <sup>146</sup>La Open
Excited structures in 146Ce were populated in β decay of the high-spin state in the neutronrich nucleus 146La. The beam was produced by the Californium Rare Isotope Breeder Upgrade (CARIBU) facility at Argonne National Laboratory, re-accel…
View article: <sup>58</sup>Ni(<sup>3</sup>He,t)<sup>58</sup>Cu*(γ) measurements with GODDESS to constrain the astrophysical rate of <sup>57</sup>Ni(p,γ)<sup>58</sup>Cu
<sup>58</sup>Ni(<sup>3</sup>He,t)<sup>58</sup>Cu*(γ) measurements with GODDESS to constrain the astrophysical rate of <sup>57</sup>Ni(p,γ)<sup>58</sup>Cu Open
The observation of γ rays from the decay of 44 Ti in the remnants of core-collapse supernovae (CCSNe) provides crucial information regarding the nucleosynthesis occurring in these events, as 44 Ti production is sensitive to CCSNe condition…
View article: Search for Weak Side Branches in the Electromagnetic Decay Paths of the 6526-keV 10+ Isomer in 54Fe
Search for Weak Side Branches in the Electromagnetic Decay Paths of the 6526-keV 10+ Isomer in 54Fe Open
High-spin nuclear isomers in N≈Z nuclei between doubly magic 40Ca and 56Ni provide an excellent testing ground for the nuclear shell model and questions related to isospin symmetry breaking in the vicinity of the proton drip line. The purp…
View article: Masses and Beta-decay Studies of Neutron-rich Nuclei using the X-array and Gammasphere
Masses and Beta-decay Studies of Neutron-rich Nuclei using the X-array and Gammasphere Open
Properties of neutron-rich nuclei in the A˜160 region are important for achieving a better understanding of the nuclear structure in this region where little is known owing to diffculties in the production of these nuclei at the present nu…
View article: Fast-timing Measurements in $^{100}$Zr Using LaBr$_{3}$(Ce) Detectors Coupled with Gammasphere
Fast-timing Measurements in $^{100}$Zr Using LaBr$_{3}$(Ce) Detectors Coupled with Gammasphere Open
In order to investigate the evolution of nuclear deformation in the region of the chart of nuclides around mass numbers A ' 110 and A ' 150, an experiment was performed at the Argonne National Laboratory where the gamma-decay radiation emi…
View article: Fast-timing measurements in neutron-rich odd-mass zirconium isotopes using LaBr<sub>3</sub>:Ce detectors coupled with Gammasphere
Fast-timing measurements in neutron-rich odd-mass zirconium isotopes using LaBr<sub>3</sub>:Ce detectors coupled with Gammasphere Open
A fast-timing experiment was performed at the Argonne National Laboratory to measure the lifetimes of the lowest lying states of nuclei belonging to the deformed regions around mass number A≃110 and A≃150. These regions were populated via …
View article: Disentangling unclear nuclear breakup channels of beryllium-9 using the three-axis Dalitz plot
Disentangling unclear nuclear breakup channels of beryllium-9 using the three-axis Dalitz plot Open
The three-axis Dalitz plot has been applied to the breakup of a nucleus into unequal mass fragments for the first time. The Dalitz plot allows clear identification of the various breakup channels of 9Be → 2α + n process. The method has all…
View article: Fast Timing Measurement Using an LaBr$_3$(Ce) Scintillator Detector Array Coupled with Gammasphere
Fast Timing Measurement Using an LaBr$_3$(Ce) Scintillator Detector Array Coupled with Gammasphere Open
A fast-timing experiment was performed at the Argonne National Laboratory in December 2015 and January 2016, measuring decay radiation of fission products from a 252Cf fission source. Details of the set-up, integration with Digital Gammasp…
View article: Recent advances in<i>β</i>-decay spectroscopy at CARIBU
Recent advances in<i>β</i>-decay spectroscopy at CARIBU Open
β-decay spectroscopy of nuclei far from stability can provide powerful insight into a broad variety of topics in nuclear science, ranging from exotic nuclear structure phenomena, stellar nucleosynthesis processes, and applied topics such a…