Daniel P. Burdette

Off-line commissioning of the St. Benedict radiofrequency quadrupole cooler-buncher

Daniel P. Burdette, Regan Zite, M. Brodeur, A. A. Valverde et autres

Fingerprints of Triaxiality in the Charge Radii of Neutron-Rich Ruthenium.

Bernhard Maaß, Wouter Ryssens, Kristian König, M. Bender et autres

We present the first measurements with a new collinear laser spectroscopy setup at the Argonne Tandem Linac Accelerator System, utilizing its unique capability to deliver neutron-rich refractory metal isotopes produced by the spontaneous fission of ^{252}Cf. We measured isotope shifts from optical …

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Fingerprints of Triaxiality in the Charge Radii of Neutron-Rich Ruthenium

Bernhard Maaß, Wouter Ryssens, Kristian König, Michael Bender et autres

We present the first measurements with a new collinear laser spectroscopy setup at the Argonne Tandem Linac Accelerator System, utilizing its unique capability to deliver neutron-rich refractory metal isotopes produced by the spontaneous fission of Cf 252 . We measured isotope shifts …

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Al 28 half-life measurement and the negative mirror asymmetry between the Al 28 ( β − ) Si 28 m and P 28 ( β + ) Si 28 m decays

Baoxing Liu, M. Brodeur, D. W. Bardayan, F. D. Becchetti et autres

In the past, the mirror asymmetry parameter has been proposed as a probing mechanism for the presence of beyond the standard model second-class currents in nuclear beta decay transitions. However, this was hindered by large uncertainties in the required nuclear structure correction …

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First on-line commissioning experiments at the St. Benedict facility

W. S. Porter, M. Brodeur, O. Bruce, Daniel P. Burdette et autres

Abstract Nuclear beta decays provide an excellent probe of fundamental symmetries due to their mediation by the weak interaction. In particular, precise measurements of these decays provide constraints on the unitarity of the Cabbibo-Kobayashi-Maskawa (CKM) quark-mixing matrix. While superallowed pure Fermi decays …

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Precise mass measurement of the longest odd-odd chain of nuclei with 1 + ground states

Baoxing Liu, M. Brodeur, J. A. Clark, I. Dedes et autres

Precise mass measurements of the ground and isomeric states of the odd-odd $^{108,110,112,114,116}\mathrm{Rh}$ were performed using the Canadian Penning Trap at Argonne National Laboratory, showing good agreement with recent JYFLTRAP measurements. A new possible isomeric state of $^{114}\mathrm{Rh}$ was also observed. These …

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Mass measurements of neutron-rich nuclides using the Canadian Penning Trap to inform predictions in the $r$-process rare-earth peak region

D. Ray, Nicole Vassh, A. A. Valverde, M. Brodeur et autres

Studies aiming to determine the astrophysical origins of nuclei produced by the rapid neutron capture process ($r$ process) rely on nuclear properties as inputs for simulations. The solar abundances can be used as a benchmark for such calculations, with the $r$-process rare-earth …

First total cross section measurements of Mg 25 , 26 ( α , n ) Si 28 , 29 via direct recoil detection

D. Blankstein, D. W. Bardayan, P. D. O'Malley, Jacob M. Allen et autres

The $^{25,26}\mathrm{Mg}(\ensuremath{\alpha},n)^{28,29}\mathrm{Si}$ reactions have been shown to be influential to $^{26}\mathrm{Al}$ production in massive stars. The previously measured data sets for these reactions have discrepant results, and further study is warranted. The first measurements are reported of the total reaction cross sections …

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Precise mass measurements of A = 133 isobars with the Canadian Penning Trap: Resolving the Qβ− anomaly at 133Te

A. A. Valverde, F.G. Kondev, B Liu, D. Ray et autres

We report precision mass measurements of 133 Sb, 133 g , m Te, and 133 g , m I, produced at CARIBU at Argonne National Laboratory's ATLAS facility and measured using the Canadian Penning Trap mass spectrometer . These masses clarify an …

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Investigating the effects of precise mass measurements of Ru and Pd isotopes on machine learning mass modeling

W. S. Porter, B Liu, D. Ray, A. A. Valverde et autres

Atomic masses are a foundational quantity in our understanding of nuclear structure, astrophysics, and fundamental symmetries. The longstanding goal of creating a predictive global model for the binding energy of a nucleus remains a significant challenge, however, and prompts the need for …

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Improved Tensor Current Limit from B8 β Decay Including New Recoil-Order Calculations

B. Longfellow, Aaron T. Gallant, Grigor H. Sargsyan, M. T. Burkey et autres

A precision measurement of the ${\ensuremath{\beta}}^{+}$ decay of $^{8}\mathrm{B}$ was performed using the Beta-decay Paul Trap to determine the $\ensuremath{\beta}\text{\ensuremath{-}}\ensuremath{\nu}$ angular correlation coefficient ${a}_{\ensuremath{\beta}\ensuremath{\nu}}$. The experimental results were combined with new ab initio symmetry-adapted no-core shell-model calculations to yield the second-most precise …

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Evolution of chirality from transverse wobbling in $^{135}$Pr

N. Sensharma, U. Garg, Q. B. Chen, S. G. Frauendorf et autres

Chirality is a distinct signature that characterizes triaxial shapes in nuclei. We report the first observation of chirality in the nucleus $^{135}$Pr using a high-statistics Gammasphere experiment with the $^{123}$Sb($^{16}$O,4n)$^{135}$Pr reaction. Two chiral-partner bands with the configuration $π(1h_{11/2})^1\otimesν(1h_{11/2})^{-2}$ have been identified in …