S. A. Kuvin

Los Alamos National Laboratory

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L. T. Baby

Florida State University

I. Wiedenhöver

Florida State University

Hye Young Lee

Los Alamos National Laboratory

C. R. Hoffman

Argonne National Laboratory

D. Santiago-Gonzalez

Argonne National Laboratory

M. L. Avila

Argonne National Laboratory

R. Talwar

Argonne National Laboratory

Lukas Zavorka

Los Alamos National Laboratory

T. Steinbach

Ludwig-Maximilians-Universität München

B. P. Kay

Argonne National Laboratory

Cooperative Institutions

Michigan State University

Argonne National Laboratory

Los Alamos National Laboratory

Joint Institute for Nuclear Astrophysics

National Superconducting Cyclotron Laboratory

University of Notre Dame

Florida State University

Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud

Centre National de la Recherche Scientifique

Louisiana State University

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Nuclear Astrophysics Studies with an Isomeric ²⁶Al^m Beam

S. Almaraz-Calderon Benjamin Asher N. Gerken K. Hanselman K. E. Rehm

Nuclear astrophysics

10.1142/9789813229426_0087

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Citations (0)

Chlorine Nuclear Data Evaluation Aided Through New LANSCE Measurements

S. A. Kuvin K. Hanselman Toshihiko Kawano Hye Young Lee T. Cisneros

Nuclear data

10.2172/2440173

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Position-sensitive, fast ionization chambers

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment (2018)

J. Lai Liudmyla Afanasieva J. C. Blackmon C. M. Deibel Hannah Gardiner

Position (finance)

Particle identification

10.1016/j.nima.2018.01.010

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Citations (11)

RESONEUT: A detector system for spectroscopy with (d,n) reactions in inverse kinematics

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment (2017)

L. T. Baby S. A. Kuvin I. Wiedenhöver M. Anastasiou D. D. Caussyn

Neutron Detection

Neutron spectroscopy

10.1016/j.nima.2017.09.019

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Citations (4)

First Observation of Unbound O11 , the Mirror of the Halo Nucleus Li

Physical Review Letters (2019)

T. B. Webb S. M. Wang K. W. Brown R. J. Charity J. M. Elson

The structure of the extremely proton-rich nucleus $^{11}_{~8}$O$_3$, the mirror of the two-neutron halo nucleus $^{11}_{~3}$Li$_8$, has been studied experimentally for the first time. Following two-neutron knockout reactions with a $^{13}$O beam, the $^{11}$O decay products were detected after two-proton emission and used to construct an invariant-mass spectrum. A broad peak of width $\sim$3\,MeV was observed. Within the Gamow coupled-channel approach, it was concluded that this peak is a multiplet with contributions from the four-lowest $^{11}$O resonant states: $J^{\pi}$=3/2$^-_1$, 3/2$^-_2$, 5/2$^+_1$, and 5/2$^+_2$. The widths and configurations of these states show strong, non-monotonic dependencies on the depth of the $p$-$^9$C potential. This unusual behavior is due to the presence of a broad threshold resonant state in $^{10}$N, which is an analog of the virtual state in $^{10}$Li in the presence of the Coulomb potential. After optimizing the model to the data, only a moderate isospin asymmetry between ground states of $^{11}$O and $^{11}$Li was found.

Multiplet

10.1103/physrevlett.122.122501

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Citations (41)

Constraining the νp-process through the study of neutron-induced charged-particle reactions on short-lived 56 Ni

Bulletin of the American Physical Society (2019)

S. A. Kuvin Hye Young Lee Christiaan Vermeulen Kevin Bennett Eva R. Birnbaum

r-process

Particle (ecology)

Source

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Citations (0)

Radioactive target needs for nuclear data

OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (2020)

Hye Young Lee S. A. Kuvin Brad Joseph DiGiovine P. Koehler Christiaan Vermeulen

Nuclear data

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Sub-barrier enhancement of fusion as compared to a microscopic method inO18+C12

Physical Review C (2014)

T. Steinbach J. Vadas Jon Schmidt Cody Haycraft S. Hudan

Measurement of the energy dependence of the fusion cross-sec on at sub-barrier energies provides an important test for theoretical models of fusion. To extend the measurement of fusion cross-sections in the sub-barrier domain for the 18O+12C system. Use the new experimental data to confront microscopic calculations of fusion. Evaporation residues produced in fusion of 18O ions with 12C target nuclei were detected with good geometric efficiency and identified by measuring their energy and time-of-flight. Theoretical calculations with a density constrained time dependent Hartree-Fock (DC-TDHF) theory include for the first time the effect of pairing on the fusion cross-section. Comparison of the measured fusion excitation function with the predictions of the DC-TDHF calculations reveal that the experimental data exhibits a smaller decrease in cross-section with decreasing energy than is theoretically predicted. The larger cross-sections observed at the lowest energies measured indicate a larger tunneling probability for the fusion process. This larger probability can be associated with a smaller, narrower fusion barrier than presently included in the theoretical calculations.

10.1103/physrevc.90.041603

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Citations (29)

Astrophysical S-factor for the 3He(α,γ)7Be reaction via the asymptotic normalization coefficient (ANC) method

Physics Letters B (2020)

G. Kiss M. La Cognata C. Spitaleri R. Yarmukhamedov I. Wiedenhöver

The detection of the neutrinos produced in the p−p chain and in the CNO cycle can be used to test the Standard Solar Model. The 3He(α,γ)7Be reaction is the first reaction of the 2nd and 3rd branch of the p−p chain, therefore, the uncertainty of its cross section sensitively influences the prediction of the 7Be and 8B neutrino fluxes. Despite its importance and the large number of experimental and theoretical works devoted to this reaction, the knowledge on the reaction cross section at energies characterizing the core of the Sun (15 keV - 30 keV) is limited and further experimental efforts are needed to reach the desired (≈ 3%) accuracy. The precise knowledge on the external capture contribution to the 3He(α,γ)7Be reaction cross section is crucial for the theoretical description of the reaction mechanism. In the present work the indirect measurement of this external capture contribution using the Asymptotic Normalization Coefficient (ANC) technique is reported. To extract the ANC, the angular distributions of deuterons emitted in the 6Li(3He,d)7Be α-transfer reaction were measured with high precision at EH3e = 3.0 MeV and EH3e = 5.0 MeV. The ANCs were then extracted from comparison of DWBA calculations to the measured data and the zero energy astrophysical S-factor for 3He(α,γ)7Be reaction was found to be 0.534 ± 0.025 keVb.

Normalization

Reaction rate

10.1016/j.physletb.2020.135606

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Citations (35)

Experimental study of the low-lying negative-parity states in [Formula : see text] using the [Formula : see text] reaction

Physical review. C (2019)

J Chen K. Auranen M. L. Avila B. B. Back M. A. Caprio

Parity (physics)

Lying

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