R. Reifarth
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View article: A prototype neutron-detector array for future deep-underground <i>s</i>-process studies
A prototype neutron-detector array for future deep-underground <i>s</i>-process studies Open
We report a novel neutron-detection approach employing an EJ-309 liquid scintillator surrounded by six 3 He proportional counters. Tests were performed at the FRANZ facility of the Goethe-University Frankfurt using the 7 Li( p , n 0 ) 7 Be…
View article: First Proton-Induced Cross Sections on a Stored Rare Ion Beam: Measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Te</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>118</mml:mn></mml:mrow></mml:mmultiscripts><mml:mo stretchy="false">(</mml:mo><mml:mi mathvariant="normal">p</mml:mi><mml:mo>,</mml:mo><mml:mi>γ</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math> for Explosive Nucleosynthesis
First Proton-Induced Cross Sections on a Stored Rare Ion Beam: Measurement of for Explosive Nucleosynthesis Open
We present the first nuclear cross-section measurements of (p,γ) and (p,n) reactions on Te
View article: From reactors to stars
From reactors to stars Open
View article: Bayesian and Monte Carlo approaches to estimating uncertainty for the measurement of the bound-state $β$ decay of $^{205}\mathrm{Tl}^{81+}$
Bayesian and Monte Carlo approaches to estimating uncertainty for the measurement of the bound-state $β$ decay of $^{205}\mathrm{Tl}^{81+}$ Open
The measurement of the bound-state $β$ decay of $^{205}\mathrm{Tl}^{81+}$ at the Experimental Storage Ring at GSI, Darmstadt, has recently been reported with substantial impact on the use of $^{205}\mathrm{Pb}$ as an early Solar System chr…
View article: Nuclear Astrophysics in the Storage Ring: Background Suppressed Simultaneous Measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mi>p</mml:mi><mml:mo>,</mml:mo><mml:mi>γ</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mi>p</mml:mi><mml:mo>,</mml:mo><mml:mi>n</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math> Reactions
Nuclear Astrophysics in the Storage Ring: Background Suppressed Simultaneous Measurement of and Reactions Open
We report the application of the new elimination of Rutherford elastic scattering technique for the measurement of proton-induced reaction cross sections utilizing stored ions decelerated to astrophysical energies. This approach results in…
View article: First simultaneous measurement of the γ-ray and neutron emission probabilities in inverse kinematics at a heavy-ion storage ring
First simultaneous measurement of the γ-ray and neutron emission probabilities in inverse kinematics at a heavy-ion storage ring Open
The probabilities for γ-ray and particle emission as a function of the excitation energy of a decaying nucleus are valuable observables for constraining the ingredients of the models that describe the deexcitation of nuclei near the partic…
View article: First Measurement of the Neutron-Emission Probability with a Surrogate Reaction in Inverse Kinematics at a Heavy-Ion Storage Ring
First Measurement of the Neutron-Emission Probability with a Surrogate Reaction in Inverse Kinematics at a Heavy-Ion Storage Ring Open
Neutron-induced reaction cross sections of short-lived nuclei are imperative to understand the origin of heavy elements in stellar nucleosynthesis and for societal applications, but their measurement is extremely complicated due to the rad…
View article: Multidisciplinary Science in the Multimessenger Era
Multidisciplinary Science in the Multimessenger Era Open
Astrophysical observations of the cosmos allow us to probe extreme physics and answer foundational questions on our universe. Modern astronomy is increasingly operating under a holistic approach, probing the same question with multiple dia…
View article: Precise measurement of nuclear interaction cross sections towards neutron-skin determination with R3B
Precise measurement of nuclear interaction cross sections towards neutron-skin determination with R3B Open
5 pages, 2 figures
View article: Reaching for the stars: Next-generation neutron reaction experiments with the Neutron Target Demonstrator and the ASTRA Facility at LANSCE
Reaching for the stars: Next-generation neutron reaction experiments with the Neutron Target Demonstrator and the ASTRA Facility at LANSCE Open
View article: Measurement and analysis of the $$^{246}$$Cm and $$^{248}$$Cm neutron capture cross-sections at the EAR2 of the n_TOF facility at CERN
Measurement and analysis of the $$^{246}$$Cm and $$^{248}$$Cm neutron capture cross-sections at the EAR2 of the n_TOF facility at CERN Open
View article: Bound-State Beta Decay of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Tl</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>205</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow><mml:mrow><mml:mn>81</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math> Ions and the LOREX Project
Bound-State Beta Decay of Ions and the LOREX Project Open
Stable Tl
View article: High-temperature 205Tl decay clarifies 205Pb dating in early Solar System
High-temperature 205Tl decay clarifies 205Pb dating in early Solar System Open
View article: First experiments with a graphite moderator for the Neutron Target Demonstator (NTD)
First experiments with a graphite moderator for the Neutron Target Demonstator (NTD) Open
This report is a major update of the report ”Cubical moderators for the Neutron\nTarget Demonstator (NTD), LA-UR-23-33899”. It serves as a documentation\nof milestone M1 of the LDRD project 20240004DR.
View article: Tomorrow's experimental capabilities, today: The Neutron Target Demonstrator at LANSCE
Tomorrow's experimental capabilities, today: The Neutron Target Demonstrator at LANSCE Open
View article: Tomorrow's experimental capabilities, today: The Neutron Target Demonstrator at LANSCE
Tomorrow's experimental capabilities, today: The Neutron Target Demonstrator at LANSCE Open
View article: Neutron reaction experiments in inverse kinematics with the Neutron Target Demonstrator and Low-Energy Heavy Ion Source at LANSCE
Neutron reaction experiments in inverse kinematics with the Neutron Target Demonstrator and Low-Energy Heavy Ion Source at LANSCE Open
View article: <sup>169</sup>Tm(n,$\gamma$) cross section measured at DANCE
<sup>169</sup>Tm(n,$\gamma$) cross section measured at DANCE Open
During the US nuclear testing program, known tracer materials could be loaded into the device prior to detonation. If those materials had activation products from nuclear reactions, they could be recovered and counted post-test to study ho…
View article: GEANT4 code for DANCE with NEUANCE detector-response simulations
GEANT4 code for DANCE with NEUANCE detector-response simulations Open
A new GEANT4 model for DANCE with NEUANCE has been developed to account for the change in the DANCE configuration when NEUANCE is installed. In this model, the energy resolution and the shape of the threshold of the individual DANCE detect…
View article: Carbon Block Density
Carbon Block Density Open
Within the framework of the Neutron Target Demonstrator about 1 m3 of reactor grade graphite is available at LANSCE. In order to evaluate its suitability as a moderator, knowledge about the exact density is important, since it s…
View article: Measurement of nuclear interaction cross sections towards neutron-skin thickness determination
Measurement of nuclear interaction cross sections towards neutron-skin thickness determination Open
View article: New insight into knockout reactions from the two-proton halo nucleus <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Ne</mml:mi><mml:mprescripts/><mml:none/><mml:mn>17</mml:mn></mml:mmultiscripts></mml:math>
New insight into knockout reactions from the two-proton halo nucleus Open
The unexplained disagreement in the dependence of spectroscopic factors (C2Sexp) on the binding energy obtained by nucleon knockout using different targets is still a puzzle that needs to be addressed. To find an explanation of this riddle…
View article: A high-intensity, low-energy heavy ion source for a neutron target proof-of-principle experiment at LANSCE
A high-intensity, low-energy heavy ion source for a neutron target proof-of-principle experiment at LANSCE Open
The capability to directly study neutron capture reactions on radionuclides with half-lives on the of order minutes would allow key cross section measurements in nuclear astrophysics and energy applications. However, such experiments with …
View article: Background simulations for DANCE, FP-14 considering the Mark IV spallation target
Background simulations for DANCE, FP-14 considering the Mark IV spallation target Open
With the installation of the Mark-IV target at LANSCE in 2022 significant changes of the beam-related backgrounds at DANCE are observed. DANCE is located at flight path 14 (FP-14) in the experimental area 2 (ER-2) at LANSCE. This new backg…
View article: Development of cerium fluoride nanocomposites for neutron capture measurements
Development of cerium fluoride nanocomposites for neutron capture measurements Open
View article: RECENT ACTINIDE NUCLEAR DATA EFFORTS USING THE DANCE 4PI BAF2 ARRAY
RECENT ACTINIDE NUCLEAR DATA EFFORTS USING THE DANCE 4PI BAF2 ARRAY Open
View article: DANCing with the stars: measuring neutron capture on unstable isotopes with DANCE
DANCing with the stars: measuring neutron capture on unstable isotopes with DANCE Open
View article: Analysis of the 237 Np neutron capture cross section at DANCE
Analysis of the 237 Np neutron capture cross section at DANCE Open
View article: Radioactive targets for neutron-induced cross section measurements
Radioactive targets for neutron-induced cross section measurements Open
Measurements using radioactive targets are important for the determination of key reaction path ways associated with the synthesis of the elements in nuclear astrophysics (sprocess), advanced fuel cycle initiative (transmutation of radioac…
View article: Characterization of Cerium Fluoride Nanocomposite Scintillators
Characterization of Cerium Fluoride Nanocomposite Scintillators Open
Measurement of the neutron capture cross-sections of a number of short-lived isotopes would advance both pure and applied scientific research. These cross-sections are needed for calculation of criticality and waste production estimates fo…