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147 results on '"Tolstukhin, I. A."'

1. Meaurement of spin vs. TKE of $^{144}$Ba produced in spontaneous fission of $^{252}$Cf

Author

Giha, N. P., Marin, S., Tolstukhin, I. A., Oberling, M. B., Knaack, R. A., Mueller-Gatermann, C., Korichi, A., Bhatt, K., Carpenter, M. P., Fougères, C., Karayonchev, V., Kay, B. P., Lauritsen, T., Seweryniak, D., Watwood, N., Duke, D. L., Mosby, S., Montoya, K. B., Connolly, D. S., Loveland, W., Hernandez, I. E., Clarke, S. D., Pozzi, S. A., and Tovesson, F.

Subjects
Nuclear Experiment
Abstract

We measure the average spin of $^{144}$Ba, a common fragment produced in $^{252}$Cf(sf), as a function of the total kinetic energy (TKE). We combined for the first time a twin Frisch-gridded ionization chamber with a world-class $\gamma$-ray spectrometer that was designed to measure high-multiplicity $\gamma$-ray events, Gammasphere. The chamber, loaded with a $^{252}$Cf(sf) source, provides a fission trigger, the TKE of the fragments, the approximate fragment masses, and the polar angle of the fission axis. Gammasphere provides the total $\gamma$-ray yield, fragment identification through the tagging of decay $\gamma$ rays, and the feeding of rotational bands in the fragments. We determine the dependence of the average spin of $^{144}$Ba on the fragments' TKE by correlating the fragment properties with the distribution of discrete levels that are fed. We find that the average spin only changes by about $0.5$ $\hbar$ across the TKE range of 158-203 MeV. The virtual independence of the spin on TKE suggests that spin is not solely generated through the statistical excitation of rotational modes, and more complex mechanisms are required., Comment: Accepted for publication in Phys. Rev. C

Published
2024

2. Evolution of the nuclear spin-orbit splitting explored via the $^{32}$Si($d$,$p$)$^{33}$Si reaction using SOLARIS

Author

Chen, J., Kay, B. P., Hoffman, C. R., Tang, T. L., Tolstukhin, I. A., Bazin, D., Lubna, R. S., Ayyad, Y., Beceiro-Novo, S., Coombes, B. J., Freeman, S. J., Gaffney, L. P., Garg, R., Jayatissa, H., Kuchera, A. N., MacGregor, P., Mitchell, A. J., Mittig, W., Monteagudo, B., Munoz-Ramos, A., Müller-Gatermann, C., Recchia, F., Rijal, N., Santamaria, C., Serikow, M. Z., Sharp, D. K., Smith, J., Stecenko, J. K., Wilson, G. L., Wuosmaa, A. H., Yuan, C. X., Zamora, J. C., and Zhang, Y. N.

Subjects
Nuclear Experiment
Abstract

The spin-orbit splitting between neutron 1$p$ orbitals at $^{33}$Si has been deduced using the single-neutron-adding ($d$,$p$) reaction in inverse kinematics with a beam of $^{32}$Si, a long-lived radioisotope. Reaction products were analyzed by the newly implemented SOLARIS spectrometer at the reaccelerated-beam facility at the National Superconducting Cyclotron Laboratory. The measurements show reasonable agreement with shell-model calculations that incorporate modern cross-shell interactions, but they contradict the prediction of proton density depletion based on relativistic mean-field theory. The evolution of the neutron 1$p$-shell orbitals is systematically studied using the present and existing data in the isotonic chains of $N=17$, 19, and 21. In each case, a smooth decrease in the separation of the $1p_{3/2}$-$1p_{1/2}$ orbitals is seen as the respective $p$-orbitals approach zero binding, suggesting that the finite nuclear potential strongly influences the evolution of nuclear structure in this region., Comment: 10 pages, 5 figures

Published
2024

3. Direct cross-section measurement of the weak r-process 88Sr({\alpha},n)91Zr reaction in {\nu}-driven winds of core collapse supernovae

Author

Fougères, C., Avila, M. L., Jayatissa, H., Santiago-Gonzalez, D., Brandenburg, K., Meisel, Z., Mohr, P., Montes, F., Műller-Gatermann, C., Neto, D., Ong, W. -J., Pereira, J., Rehm, K. E., Tang, T. L., Tolstukhin, I. A., Varriano, L., Wilson, G., and Wu, J.

Subjects
Nuclear Experiment
Abstract

About half of the heavy elements beyond iron are known to be produced by the rapid neutron capture process, known as r-process. However, the astrophysical site producing the r-process is still uncertain. Chemical abundances observed in several cosmic sites indicate that different mechanisms should be at play. For instance, the abundances around silver measured in a subset of metal-poor stars indicate the presence of a weak r-process. This process may be active in neutrino-driven winds of core collapse supernovae where (${\alpha}$,n) reactions dominate the synthesis of Z ~ 40 elements in the expelled materials. Scarcely measured, the rates of (${\alpha}$,n) reactions are determined from statistical Hauser-Feshbach calculations with ${\alpha}$-optical-model potentials, which are still poorly constrained. The uncertainties of the (${\alpha}$,n) reaction rates therefore make a significant contribution to the uncertainties of the abundances determined from stellar modeling. In this work, the $^{88}$Sr(${\alpha}$,n)$^{91}$Zr reaction which impacts the weak r-process abundances has been probed at astrophysics energy for the first time; directly measuring the total cross sections at astrophysical energies of 8.37 - 13.09 MeV in the center of mass (3.8 - 7.5 GK). Two measurements were performed at ATLAS with the electrically-segmented ionization chamber MUSIC, in inverse kinematics, while following the active target technique. The cross sections of this ${\alpha}$-induced reaction on $^{88}$Sr, located at the shell closure N = 50, have been found to be lower than expected, by a factor of 3, despite recent statistical calculations validated by measurements on neighboring nuclei. This result encourages more experimental investigations of (${\alpha}$,n) reactions, at N = 50 and towards the neutron-rich side, to further test the predictive power and reliability of such calculations., Comment: 9 pages, 6 conference

Published
2024

4. COHERENT Collaboration data release from the measurements of CsI[Na] response to nuclear recoils

Author

Akimov, D., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Bernardi, I., Blackston, M. A., Bock, C., Bolozdynya, A., Browning, J., Cabrera-Palmer, B., Chernyak, D., Conley, E., Daughhetee, J., Detwiler, J., Ding, K., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Rosso, A. Gallo, Galindo-Uribarri, A., Green, M. P., Heath, M. R., Hedges, S., Hoang, D., Hughes, M., Johnson, T., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Li, L., Link, J. M., Liu, J., Mann, K., Markoff, D. M., Mastroberti, J., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S. I., Pershey, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Ross, J., Rudik, D., Runge, J., Salvat, D. J., Salyapongse, A. M., Sander, J., Scholberg, K., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovtsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Tolstukhin, I., Ujah, E., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Wongjirad, T., Yang, Y., Yen, Y. -R., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

Subjects
Physics - Instrumentation and Detectors
Abstract

Description of the data release 10.13139/OLCF/1969085 (https://doi.ccs.ornl.gov/ui/doi/426) from the measurements of the CsI[Na] response to low energy nuclear recoils by the COHERENT collaboration. The release corresponds to the results published in "D. Akimov et al 2022 JINST 17 P10034". We share the data in the form of raw ADC waveforms, provide benchmark values, and share plots to enhance the transparency and reproducibility of our results. This document describes the contents of the data release as well as guidance on the use of the data.

Published
2023

5. Direct Determination of Fission-Barrier Heights Using Light-Ion Transfer in Inverse Kinematics

Author

Bennett, S. A., Garett, K., Sharp, D. K., Freeman, S. J., Smith, A. G., Wright, T. J., Kay, B. P., Tang, T. L., Tolstukhin, I. A., Ayyad, Y., Chen, J., Davies, P. J., Dolan, A., Gaffney, L. P., Heinz, A., Hoffman, C. R., Müller-Gatermann, C., Page, R. D., and Wilson, G. L.

Subjects
Nuclear Experiment
Abstract

We demonstrate a new technique for obtaining fission data for nuclei away from $\beta$-stability. These types of data are pertinent to the astrophysical \textit{r-}process, crucial to a complete understanding of the origin of the heavy elements, and for developing a predictive model of fission. These data are also important considerations for terrestrial applications related to power generation and safeguarding. Experimentally, such data are scarce due to the difficulties in producing the actinide targets of interest. The solenoidal-spectrometer technique, commonly used to study nucleon-transfer reactions in inverse kinematics, has been applied to the case of transfer-induced fission as a means to deduce the fission-barrier height, among other variables. The fission-barrier height of $^{239}$U has been determined via the $^{238}$U($d$,$pf$) reaction in inverse kinematics, the results of which are consistent with existing neutron-induced fission data indicating the validity of the technique.

Published
2023
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6. Instrumentation for correlated prompt $n$-$\gamma$ emission studies in coincidence with fission fragments

Author

Marin, S., Tolstukhin, I., Oberling, M. B., Knaack, R. A., Kay, B. P., Duke, D. L., Montoya, K. B., Connolly, D., Loveland, W., Chemey, A., Pozzi, S. A., and Tovesson, F.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

Recent theoretical and experimental results have brought renewed interest and focus on the topic of fission fragment angular momentum. Measurements of neutrons and $\gamma$ rays in coincidence with fission fragments remain the most valuable tool in the exploration of fission physics. To achieve these scientific goals, we have developed a system that combines a state-of-the-art fission fragment detector and $n$-$\gamma$ radiation detectors. A new twin Frisch-gridded ionization chamber has been designed and constructed for use with a spontaneous fission source and an array of forty \textit{trans}-stilbene organic scintillators (FS-3) at Argonne National Laboratory. The new ionization chamber design we present in this work aims at minimizing particle attenuation in the chamber walls, and provides a compact apparatus that can be fit inside existing experimental systems. The ionization chamber is capable of measuring fission fragment masses and kinetic energies, whereas the FS-3 provides neutron and gamma-ray multiplicities and spectra. The details of both detector assembly are presented along with the first experimental results of this setup. Planned event-by-event analysis and future experiments are briefly discussed., Comment: 7 pages, 10 figures

Published
2022
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7. Probing the quadrupole transition strength of 15C via deuteron inelastic scattering

Author

Chen, J., Kay, B. P., Tang, T. L., Tolstukhin, I. A., Hoffman, C. R., Li, H., Yin, P., Zhao, X., Maris, P., Vary, J. P., Li, G., Lou, J. L., Avila, M. L., Ayyad, Y., Bennett, S., Bazin, D., Clark, J. A., Freeman, S. J., Jayatissa, H., Müller-Gatermann, C., Munoz, A., Santiago-Gonzalez, D., Sharp, D. K., Wuosmaa, A. H., and Yuan, C. X.

Subjects
Nuclear Experiment
Abstract

Deuteron elastic scattering from 15C and inelastic scattering reactions to the first excited state of 15C were studied using a radioactive beam of 15C in inverse kinematics. The scattered deuterons were measured using HELIOS. The elastic scattering differential cross sections were analyzed using the optical model. A matter deformation length {\delta}d = 1.04(11) fm has been extracted from the differential cross sections of inelastic scattering to the first excited state. The ratio of neutron and proton matrix elements Mn/Mp = 3.6(4) has been determined from this quadrupole transition. Neutron effective charges and core-polarization parameters of 15C were determined and discussed. Results from ab-initio no-core configuration interaction calculations were also compared with the experimental observations. This result supports a moderate core decoupling effect of the valence neutron in 15C similarly to its isotone 17O, in line with the interpretation of other neutron-rich carbon isotopes.

Published
2022
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8. Quenching of Single-Particle Strength in A=15 Nuclei

Author

Kay, B. P., Tang, T. L., Tolstukhin, I. A., Roderick, G. B., Mitchell, A. J., Ayyad, Y., Bennett, S. A., Chen, J., Chipps, K. A., Crawford, H. L., Freeman, S. J., Garrett, K., Gott, M. D., Hall, M. R., Hoffman, C. R., Jayatissa, H., Macchiavelli, A. O., MacGregor, P. T., Sharp, D. K., and Wilson, G. L.

Subjects
Nuclear Experiment
Abstract

Absolute cross sections for the addition of $s$- and $d$-wave neutrons to $^{14}$C and $^{14}$N have been determined simultaneously via the ($d$,$p$) reaction at 10 MeV/u. The difference between the neutron and proton separation energies, $\Delta S$, is around $-20$ MeV for the $^{14}$C$+$$n$ system and $+8$ MeV for $^{14}$N$+$$n$. The population of the $1s_{1/2}$ and $0d_{5/2}$ orbitals for both systems is reduced by a factor of approximately 0.5 compared to the independent single-particle model, or about 0.6 when compared to the shell model. This finding strongly contrasts with results deduced from intermediate-energy knockout reactions between similar nuclei on targets of $^{9}$Be and $^{12}$C. The simultaneous technique used removes many systematic uncertainties., Comment: 6 pages, 4 figures

Published
2022
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9. A COHERENT constraint on leptophobic dark matter using CsI data

Author

COHERENT Collaboration, Akimov, D., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Bernardi, I., Blackston, M. A., Bock, C., Bolozdynya, A., Bouabid, R., Browning, J., Cabrera-Palmer, B., Chernyak, D., Conley, E., Daughhetee, J., Detwiler, J., Ding, K., Durand, M. R., Efremenko, Y., Elliot, S. R., Fabris, L., Febbraro, M., Rosso, A. Gallo, Galindo-Uribarri, A., Green, M. P., Heath, M. R., Hedges, S., Hoang, D., Hughes, M., Johnson, B. A., Johnson, T., Khromov, A., Konovalov, A., Kozlova, E., Kupman, A., Li, L., Link, J. M., Liu, J., Major, A., Mann, K., Markoff, D. M., Mastroberti, J., Mattingly, J., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S. I., Pershey, D., Prior, C., Rapp, R., Ray, H., Razuvaeva, O., Reyna, D., Rich, G. C., Ross, J., Rudik, D., Runge, J., Salvat, D. J., Salyapongse, A. M., Sander, J., Scholberg, K., Shakirov, A., Simakov, G., Snow, W. M., Sosnovstsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Tolstukhin, I., Ujah, E., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Wongjirad, T., Yen, W. -R., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

Subjects
High Energy Physics - Experiment
Abstract

We use data from the COHERENT CsI[Na] scintillation detector to constrain sub-GeV leptophobic dark matter models. This detector was built to observe low-energy nuclear recoils from coherent elastic neutrino-nucleus scattering. These capabilities enable searches for dark matter particles produced at the Spallation Neutron Source mediated by a vector portal particle with masses between 2 and 400 MeV/c$^2$. No evidence for dark matter is observed and a limit on the mediator coupling to quarks is placed. This constraint improves upon previous results by two orders of magnitude. This newly explored parameter space probes the region where the dark matter relic abundance is explained by leptophobic dark matter when the mediator mass is roughly twice the dark matter mass. COHERENT sets the best constraint on leptophobic dark matter at these masses.

Published
2022

10. The COHERENT Experimental Program

Author

Akimov, D., Alawabdeh, S., An, P., Arteaga, A., Awe, C., Barbeau, P. S., Barry, C., Becker, B., Belov, V., Bernardi, I., Blackston, M. A., Blokland, L., Bock, C., Bodur, B., Bolozdynya, A., Bouabid, R., Bracho, A., Browning, J., Cabrera-Palmer, B., Chen, N., Chernyak, D., Conley, E., Daughhetee, J., Daughtry, J., Day, E., Coello, M. del Valle, Detwiler, J., Ding, K., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Fox, W., Galambos, J., Rosso, A. Gallo, Galindo-Uribarri, A., Gilbert, C., Green, M. P., Hansen, K. R., Harris, B., Heath, M. R., Hedges, S., Henderson, R., Hoang, D., Hughes, C., Hughes, M., Iverson, E., Jairam, P., Johnson, B. A., Johnson, T., Kaufman, L., Khromov, A., Konovalov, A., Koros, J., Kozlova, E., Kumpan, A., Li, L., Librande, J. T., Link, J. M., Liu, J., Major, A., Mann, K., Markoff, D. M., Mastroberti, J., Mattingly, J., McGoldrick, O., McIntyre, M., Melikyan, Y. A., Mishra, M., Mueller, P. E., Newby, J., Parno, D. S., Penne, A., Penttila, S. I., Pershey, D., Prior, C., Radford, D., Rahman, F., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Rimal, D., Ross, J., Rouzky, A., Rudik, D., Runge, J., Salvat, D. J., Salyapongse, A. M., Sander, J., Scholberg, K., Siehien, P., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovstsev, V., Steele, J., Hjelmstad, A. Strasbaugh, Subedi, T., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Thornton, R. T., Tolstukhin, I., Trotter, S., Tsai, F., Tsai, Y. -T., Ujah, E., Vanderwerp, J., van Nieuwenhuizen, E., Varner, R. L., Vasquez, S., Virtue, C. J., Visser, G., Walkup, K., Wang, J., Ward, E. M., Wiseman, C., Wongjirad, T., Wu, D., Yang, J., Yang, Y., Yen, Y. -R., Yoo, J., Yu, C. -H., Zettlemoyer, J., and Zhang, S.

Subjects
High Energy Physics - Experiment, Nuclear Experiment, Physics - Instrumentation and Detectors
Abstract

The COHERENT experiment located in Neutrino Alley at the Spallation Neutron Source (SNS), Oak Ridge National Laboratory (ORNL), has made the world's first two measurements of coherent elastic neutrino-nucleus scattering (CEvNS), on CsI and argon, using neutrinos produced at the SNS. The COHERENT collaboration continues to pursue CEvNS measurements on various targets as well as additional studies of inelastic neutrino-nucleus interactions, searches for accelerator-produced dark matter (DM) and physics beyond the Standard Model, using the uniquely high-quality and high-intensity neutrino source available at the SNS. This white paper describes primarily COHERENT's ongoing and near-future program at the SNS First Target Station (FTS). Opportunities enabled by the SNS Second Target Station (STS) for the study of neutrino physics and development of novel detector technologies are elaborated in a separate white paper., Comment: 38 papers, 24 figures; Snowmass contribution

Published
2022

11. Study of the Isomeric State in $^{16}$N Using the $^{16}$N$^{g,m}$($d$,$^3$He) Reaction

Author

Tang, T. L., Hoffman, C. R., Kay, B. P., Tolstukhin, I. A., Almaraz-Calderon, S., Asher, B. W., Avila, M. L., Ayyad, Y., Brown, K. W., Bazin, D., Chen, J., Chipps, K. A., Copp, P. A., Hall, M., Jayatissa, H., Ong, H. J., Santiago-Gonzalez, D., Sharp, D. K., Song, J., Stolze, S., Wilson, G. L., and Wu, J.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The isomeric state of $^{16}$N was studied using the $^{16}$N$^{g,m}$($d$,$^3$He)~proton-removal reactions at \mbox{11.8~MeV/$u$} in inverse kinematics. The $^{16}$N beam, of which 24% was in the isomeric state, was produced using the ATLAS in-fight facility and delivered to the HELIOS spectrometer, which was used to analyze the $^{3}$He ions from the ($d$,$^{3}$He) reactions. The simultaneous measurement of reactions on both the ground and isomeric states, reduced the systematic uncertainties from the experiment and in the analysis. A direct and reliable comparison of the relative spectroscopic factors was made based on a Distorted-Wave Born Approximation approach. The experimental results suggest that the isomeric state of $^{16}$N is an excited neutron-halo state. The results can be understood through calculations using a Woods-Saxon potential model, which captures the effects of weak-binding., Comment: 8 pages, 7 figurs

Published
2021
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12. Monitoring the SNS basement neutron background with the MARS detector

Author

COHERENT Collaboration, Akimov, D., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Bernardi, I., Blackston, M. A., Bock, C., Bolozdynya, A., Browning, J., Cabrera-Palmer, B., Chernyak, D., Conley, E., Daughhetee, J., Detwiler, J., Ding, K., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Rosso, A. Gallo, Galindo-Uribarri, A., Green, M. P., Heath, M. R., Hedges, S., Hoang, D., Hughes, M., Johnson, B. A., Johnson, T., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Li, L., Link, J. M., Liu, J., Mann, K., Markoff, D. M., Mastroberti, J., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S. I., Pershey, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Ross, J., Rudik, D., Runge, J., Salvat, D. J., Salyapongse, A. M., Scholberg, K., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovstsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Tolstukhin, I., Ujah, E., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Wongjirad, T., Yen, Y. -R., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

We present the analysis and results of the first dataset collected with the MARS neutron detector deployed at the Oak Ridge National Laboratory Spallation Neutron Source (SNS) for the purpose of monitoring and characterizing the beam-related neutron (BRN) background for the COHERENT collaboration. MARS was positioned next to the COH-CsI coherent elastic neutrino-nucleus scattering detector in the SNS basement corridor. This is the basement location of closest proximity to the SNS target and thus, of highest neutrino flux, but it is also well shielded from the BRN flux by infill concrete and gravel. These data show the detector registered roughly one BRN per day. Using MARS' measured detection efficiency, the incoming BRN flux is estimated to be $1.20~\pm~0.56~\text{neutrons}/\text{m}^2/\text{MWh}$ for neutron energies above $\sim3.5$ MeV and up to a few tens of MeV. We compare our results with previous BRN measurements in the SNS basement corridor reported by other neutron detectors.

Published
2021
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13. Measurement of scintillation response of CsI[Na] to low-energy nuclear recoils by COHERENT

Author

Akimov, D., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Bernardi, I., Blackston, M. A., Bock, C., Bolozdynya, A., Browning, J., Cabrera-Palmer, B., Chernyak, D., Conley, E., Daughhetee, J., Detwiler, J., Ding, K., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Rosso, A. Gallo, Galindo-Uribarri, A., Green, M. P., Heath, M. R., Hedges, S., Hoang, D., Hughes, M., Johnson, T., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Li, L., Link, J. M., Liu, J., Mann, K., Markoff, D. M., Mastroberti, J., Melikyan, Y. A., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S. I., Pershey, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Ross, J., Rudik, D., Runge, J., Salvat, D. J., Salyapongse, A. M., Scholberg, K., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovstsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Tolstukhin, I., Ujah, E., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Wongjirad, T., Yen, Y. -R., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

Subjects
Physics - Instrumentation and Detectors
Abstract

We present results of several measurements of CsI[Na] scintillation response to 3-60 keV energy nuclear recoils performed by the COHERENT collaboration using tagged neutron elastic scattering experiments and an endpoint technique. Earlier results, used to estimate the coherent elastic neutrino-nucleus scattering (CEvNS) event rate for the first observation of this process achieved by COHERENT at the Spallation Neutron Source (SNS), have been reassessed. We discuss corrections for the identified systematic effects and update the respective uncertainty values. The impact of updated results on future precision tests of CEvNS is estimated. We scrutinize potential systematic effects that could affect each measurement. In particular we confirm the response of the H11934-200 Hamamatsu photomultiplier tube (PMT) used for the measurements presented in this study to be linear in the relevant signal scale region., Comment: The version accepted by JINST. The changes made as a result of the peer review process: 1. Section 8 "Global CsI[Na] QF data fit" is expanded. The main fit result and its uncertainty is NOT CHANGED. An alternative fit is now shown in Figure 14, Figure 15 is added to further validate the assumptions in the main fit. 2. The Appendix B is restructured for clarity

Published
2021

14. First Probe of Sub-GeV Dark Matter Beyond the Cosmological Expectation with the COHERENT CsI Detector at the SNS

Author

Akimov, D., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Bernardi, I., Blackston, M. A., Bock, C., Bolozdynya, A., Browning, J., Cabrera-Palmer, B., Chernyak, D., Conley, E., Daughhetee, J., Detwiler, J., Ding, K., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Rosso, A. Gallo, Galindo-Uribarri, A., Green, M. P., Heath, M. R., Hedges, S., Hoang, D., Hughes, M., Johnson, T., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Li, L., Link, J. M., Liu, J., Mann, K., Markoff, D. M., Mastroberti, J., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S. I., Pershey, D., Rapp, R., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Ross, J., Rudik, D., Runge, J., Salvat, D. J., Salyapongse, A. M., Sander, J., Scholberg, K., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovstsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Tolstukhin, I., Ujah, E., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Wongjirad, T., Yen, Y. -R., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

Subjects
High Energy Physics - Experiment
Abstract

The COHERENT collaboration searched for scalar dark matter particles produced at the Spallation Neutron Source with masses between 1 and 220~MeV/c$^2$ using a CsI[Na] scintillation detector sensitive to nuclear recoils above 9~keV$_\text{nr}$. No evidence for dark matter is found and we thus place limits on allowed parameter space. With this low-threshold detector, we are sensitive to coherent elastic scattering between dark matter and nuclei. The cross section for this process is orders of magnitude higher than for other processes historically used for accelerator-based direct-detection searches so that our small, 14.6~kg detector significantly improves on past constraints. At peak sensitivity, we reject the flux consistent with the cosmologically observed dark-matter concentration for all coupling constants $\alpha_D<0.64$, assuming a scalar dark-matter particle. We also calculate the sensitivity of future COHERENT detectors to dark-matter signals which will ambitiously test multiple dark-matter spin scenarios.

Published
2021

15. Measurement of the Coherent Elastic Neutrino-Nucleus Scattering Cross Section on CsI by COHERENT

Author

Akimov, D., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Bernardi, I., Blackston, M. A., Bock, C., Bolozdynya, A., Browning, J., Cabrera-Palmer, B., Chernyak, D., Conley, E., Daughhetee, J., Detwiler, J., Ding, K., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Rosso, A. Gallo, Galindo-Uribarri, A., Green, M. P., Heath, M. R., Hedges, S., Hoang, D., Hughes, M., Johnson, T., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Li, L., Link, J. M., Liu, J., Mann, K., Markoff, D. M., Mastroberti, J., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S. I., Pershey, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Ross, J., Rudik, D., Runge, J., Salvat, D. J., Salyapongse, A. M., Scholberg, K., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovstsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Tolstukhin, I., Ujah, E., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Wongjirad, T., Yen, Y. -R., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

Subjects
High Energy Physics - Experiment
Abstract

We measured the cross section of coherent elastic neutrino-nucleus scattering (\cevns{}) using a CsI[Na] scintillating crystal in a high flux of neutrinos produced at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory. New data collected before detector decommissioning has more than doubled the dataset since the first observation of \cevns{}, achieved with this detector. Systematic uncertainties have also been reduced with an updated quenching model, allowing for improved precision. With these analysis improvements, the COHERENT collaboration determined the cross section to be $(165^{+30}_{-25})\times10^{-40}$~cm$^2$, consistent with the standard model, giving the most precise measurement of \cevns{} yet. The timing structure of the neutrino beam has been exploited to compare the \cevns{} cross section from scattering of different neutrino flavors. This result places leading constraints on neutrino non-standard interactions while testing lepton flavor universality and measures the weak mixing angle as $\sin^2\theta_{W}=0.220^{+0.028}_{-0.026}$ at $Q^2\approx(50\text{ MeV})^2$

Published
2021
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16. Simulating the neutrino flux from the Spallation Neutron Source for the COHERENT experiment

Author

COHERENT Collaboration, Akimov, D., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Bernardi, I., Blackston, M. A., Bock, C., Bolozdynya, A., Browning, J., Cabrera-Palmer, B., Chernyak, D., Conley, E., Daughhetee, J., Detwiler, J., Ding, K., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Galambos, J., Rosso, A. Gallo, Galindo-Uribarri, A., Green, M. P., Heath, M. R., Hedges, S., Hoang, D., Hughes, M., Iverson, E., Johnson, T., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Li, L., Link, J. M., Liu, J., Mann, K., Markoff, D. M., Mastroberti, J., McIntyre, M., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S. I., Pershey, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Rimal, D., Ross, J., Rudik, D., Runge, J., Salvat, D. J., Salyapongse, A. M., Scholberg, K., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovstsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Tolstukhin, I., Trotter, S., Ujah, E., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Wongjirad, T., Yen, Y. -R., Yoo, J., Yu, C. -H., Zettlemoyer, J., and Zhang, S.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory is a pulsed source of neutrons and, as a byproduct of this operation, an intense source of pulsed neutrinos via stopped-pion decay. The COHERENT collaboration uses this source to investigate coherent elastic neutrino-nucleus scattering and other physics with a suite of detectors. This work includes a description of our Geant4 simulation of neutrino production at the SNS and the flux calculation which informs the COHERENT studies. We estimate the uncertainty of this calculation at about 10% based on validation against available low-energy pion production data.

Published
2021

17. A D$_{2}$O detector for flux normalization of a pion decay-at-rest neutrino source

Author

COHERENT Collaboration, Akimov, D., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Bernardi, I., Blackston, M. A., Blokland, L., Bolozdynya, A., Cabrera-Palmer, B., Chernyak, D., Conley, E., Daughhetee, J., Day, E., Detwiler, J., Ding, K., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Rosso, A. Gallo, Galindo-Uribarri, A., Green, M. P., Heath, M. R., Hedges, S., Hoang, D., Hughes, M., Johnson, T., Khromov, A., Konovalov, A., Koros, J., Kozlova, E., Kumpan, A., Li, L., Link, J. M., Liu, J., Markoff, D. M., Mann, K., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S. I., Pershey, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Ross, J., Rudik, D., Runge, J., Salvat, D. J., Salyapongse, A. M., Scholberg, K., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovstsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Tolstukhin, I., Ujah, E., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Ward, E. M., Wiseman, C., Wongjirad, T., Yen, Y. -R., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

We report on the technical design and expected performance of a 592 kg heavy-water-Cherenkov detector to measure the absolute neutrino flux from the pion-decay-at-rest neutrino source at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL). The detector will be located roughly 20 m from the SNS target and will measure the neutrino flux with better than 5% statistical uncertainty in 2 years. This heavy-water detector will serve as the first module of a two-module detector system to ultimately measure the neutrino flux to 2-3% at both the First Target Station and the planned Second Target Station of the SNS. This detector will significantly reduce a dominant systematic uncertainty for neutrino cross-section measurements at the SNS, increasing the sensitivity of searches for new physics., Comment: As accepted to JINST

Published
2021
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18. Development of a $^{83\mathrm{m}}$Kr source for the calibration of the CENNS-10 Liquid Argon Detector

Author

COHERENT Collaboration, Akimov, D., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Bernardi, I., Blackston, M. A., Blokland, L., Bolozdynya, A., Cabrera-Palmer, B., Chen, N., Chernyak, D., Conley, E., Daughhetee, J., Coello, M. del Valle, Detwiler, J. A., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Fox, W., Galindo-Uribarri, A., Rosso, A. Gallo, Green, M. P., Hansen, K. S., Heath, M. R., Hedges, S., Hughes, M., Johnson, T., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Li, L., Librande, J. T., Link, J. M., Liu, J., Mann, K., Markoff, D. M., McGoldrick, O., Mueller, P. E., Newby, J., Parno, D. S., Pentilla, S., Pershey, D., Radford, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Rudik, D., Runge, J., Salvat, D. J., Scholberg, K., Shakirov, A., Simakov, G., Snow, W. M., Sosnovtsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Thornton, R. T., Tolstukhin, I., Vanderwerp, J., Varner, R. L., Venkataraman, R., Virtue, C. J., Visser, G., Wiseman, C., Wongjirad, T., Yang, J., Yen, Y. -R., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

We report on the preparation of and calibration measurements with a $^{83\mathrm{m}}$Kr source for the CENNS-10 liquid argon detector. $^{83\mathrm{m}}$Kr atoms generated in the decay of a $^{83}$Rb source were introduced into the detector via injection into the Ar circulation loop. Scintillation light arising from the 9.4 keV and 32.1 keV conversion electrons in the decay of $^{83\mathrm{m}}$Kr in the detector volume were then observed. This calibration source allows the characterization of the low-energy response of the CENNS-10 detector and is applicable to other low-energy-threshold detectors. The energy resolution of the detector was measured to be 9$\%$ at the total $^{83\mathrm{m}}$Kr decay energy of 41.5 keV. We performed an analysis to separately calibrate the detector using the two conversion electrons at 9.4 keV and 32.1 keV, Comment: v2: As accepted to JINST

Published
2020
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19. COHERENT Collaboration data release from the first detection of coherent elastic neutrino-nucleus scattering on argon

Author

COHERENT Collaboration, Akimov, D., Albert, J. B., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Blackston, M. A., Blokland, L., Bolozdynya, A., Cabrera-Palmer, B., Chen, N., Chernyak, D., Conley, E., Cooper, R. L., Daughhetee, J., Coello, M. del Valle, Detwiler, J. A., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Fox, W., Galindo-Uribarri, A., Green, M. P., Hansen, K. S., Heath, M. R., Hedges, S., Hughes, M., Johnson, T., Kaemingk, M., Kaufman, L. J., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Li, L., Librande, J. T., Link, J. M., Liu, J., Mann, K., Markoff, D. M., McGoldrick, O., Moreno, H., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S., Pershey, D., Radford, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Rudik, D., Runge, J., Salvat, D. J., Scholberg, K., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovtsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Thornton, R. T., Tolstukhin, I., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Wiseman, C., Wongjirad, T., Yang, J., Yen, Y. -R., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

Subjects
Nuclear Experiment, High Energy Physics - Experiment
Abstract

Release of COHERENT collaboration data from the first detection of coherent elastic neutrino-nucleus scattering (CEvNS) on argon. This release corresponds with the results of "Analysis A" published in Akimov et al., arXiv:2003.10630 [nucl-ex]. Data is shared in a binned, text-based format representing both "signal" and "backgrounds" along with associated uncertainties such that the included data can be used to perform independent analyses. This document describes the contents of the data release as well as guidance on the use of the data. Included example code in C++ (ROOT) and Python show one possible use of the included data., Comment: Update document with arXiv ID number in requested citation

Published
2020
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20. The GlueX Beamline and Detector

Author

Adhikari, S., Akondi, C. S., Ghoul, H. Al, Ali, A., Amaryan, M., Anassontzis, E. G., Austregesilo, A., Barbosa, F., Barlow, J., Barnes, A., Barriga, E., Barsotti, R., Beattie, T. D., Benesch, J., Berdnikov, V. V., Biallas, G., Black, T., Boeglin, W., Brindza, P., Briscoe, W. J., Britton, T., Brock, J., Brooks, W. K., Cannon, B. E., Carlin, C., Carman, D. S., Carstens, T., Cao, N., Chernyshov, O., Chudakov, E., Cole, S., Cortes, O., Crahen, W. D., Crede, V., Dalton, M. M., Daniels, T., Deur, A., Dickover, C., Dobbs, S., Dolgolenko, A., Dotel, R., Dugger, M., Dzhygadlo, R., Dzierba, A., Egiyan, H., Erbora, T., Ernst, A., Eugenio, P., Fanelli, C., Fegan, S., Foda, A. M., Foote, J., Frye, J., Furletov, S., Gan, L., Gasparian, A., Gerasimov, A., Gevorgyan, N., Gleason, C., Goetzen, K., Goryachev, A. Goncalves V. S., Guo, L., Hakobyan, H., Hamdi, A., Hardin, J., Henschel, C. L., Huber, G. M., Hutton, C., Hurley, A., Ioannou, P., Ireland, D. G., Ito, M. M., Jarvis, N. S., Jones, R. T., Kakoyan, V., Katsaganis, S., Kalicy, G., Kamel, M., Keith, C. D., Klein, F. J., Kliemt, R., Kolybaba, D., Kourkoumelis, C., Krueger, S. T., Kuleshov, S., Larin, I., Lawrence, D., Leckey, J. P., Lersch, D. I., Leverington, B. D., Levine, W. I., Li, W., Liu, B., Livingston, K., Lolos, G. J., Lyubovitskij, V., Mack, D., Marukyan, H., Mattione, P. T., Matveev, V., McCaughan, M., McCracken, M., McGinley, W., McIntyre, J., Meekins, D., Mendez, R., Meyer, C. A., Miskimen, R., Mitchell, R. E., Mokaya, F., Moriya, K., Nerling, F., Ng, L., Ni, H., Ostrovidov, A. I., Papandreou, Z., Patsyuk, M., Paudel, C., Pauli, P., Pedroni, R., Pentchev, L., Peters, K. J., Phelps, W., Pierce, J., Pooser, E., Popov, V., Pratt, B., Qiang, Y., Qin, N., Razmyslovich, V., Reinhold, J., Ritchie, B. G., Ritman, J., Robison, L., Romanov, D., Romero, C., Salgado, C., Sandoval, N., Satogata, T., Schertz, A. M., Schadmand, S., Schick, A., Schumacher, R. A., Schwarz, C., Schwiening, J., Semenov, A. Yu., Semenova, I. A., Seth, K. K., Shen, X., Shepherd, M. R., Smith, E. S., Sober, D. I., Somov, A., Somov, S., Soto, O., Sparks, N., Staib, M. J., Stanislav, C., Stevens, J. R., Stewart, J., Strakovsky, I. I., Summner, B. C. L., Suresh, K., Tarasov, V. V., Taylor, S., Teigrob, L. A., Teymurazyan, A., Thiel, A., Tolstukhin, I., Tomaradze, A., Toro, A., Tsaris, A., Van Haarlem, Y., Vasileiadis, G., Vega, I., Visser, G., Voulgaris, G., Walford, N. K., Werthmüller, D., Whitlatch, T., Wickramaarachchi, N., Williams, M., Wolin, E., Xiao, T., Yang, Y., Zarling, J., Zhang, Z., Zhou, Q., Zhou, X., and Zihlmann, B.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

The GlueX experiment at Jefferson Lab has been designed to study photoproduction reactions with a 9-GeV linearly polarized photon beam. The energy and arrival time of beam photons are tagged using a scintillator hodoscope and a scintillating fiber array. The photon flux is determined using a pair spectrometer, while the linear polarization of the photon beam is determined using a polarimeter based on triplet photoproduction. Charged-particle tracks from interactions in the central target are analyzed in a solenoidal field using a central straw-tube drift chamber and six packages of planar chambers with cathode strips and drift wires. Electromagnetic showers are reconstructed in a cylindrical scintillating fiber calorimeter inside the magnet and a lead-glass array downstream. Charged particle identification is achieved by measuring energy loss in the wire chambers and using the flight time of particles between the target and detectors outside the magnet. The signals from all detectors are recorded with flash ADCs and/or pipeline TDCs into memories allowing trigger decisions with a latency of 3.3 $\mu$s. The detector operates routinely at trigger rates of 40 kHz and data rates of 600 megabytes per second. We describe the photon beam, the GlueX detector components, electronics, data-acquisition and monitoring systems, and the performance of the experiment during the first three years of operation., Comment: Accepted by Nuclear Instruments and Methods A, 78 pages, 54 figures

Published
2020
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21. First Measurement of Coherent Elastic Neutrino-Nucleus Scattering on Argon

Author

COHERENT Collaboration, Akimov, D., Albert, J. B., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Blackston, M. A., Blokland, L., Bolozdynya, A., Cabrera-Palmer, B., Chen, N., Chernyak, D., Conley, E., Cooper, R. L., Daughhetee, J., Coello, M. del Valle, Detwiler, J. A., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Fox, W., Galindo-Uribarri, A., Green, M. P., Hansen, K. S., Heath, M. R., Hedges, S., Hughes, M., Johnson, T., Kaemingk, M., Kaufman, L. J., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Li, L., Librande, J. T., Link, J. M., Liu, J., Mann, K., Markoff, D. M., McGoldrick, O., Moreno, H., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S., Pershey, D., Radford, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Rudik, D., Runge, J., Salvat, D. J., Scholberg, K., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovtsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Thornton, R. T., Tolstukhin, I., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Wiseman, C., Wongjirad, T., Yang, J., Yen, Y. -R., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

Subjects
Nuclear Experiment, High Energy Physics - Experiment
Abstract

We report the first measurement of coherent elastic neutrino-nucleus scattering (\cevns) on argon using a liquid argon detector at the Oak Ridge National Laboratory Spallation Neutron Source. Two independent analyses prefer \cevns over the background-only null hypothesis with greater than $3\sigma$ significance. The measured cross section, averaged over the incident neutrino flux, is (2.2 $\pm$ 0.7) $\times$10$^{-39}$ cm$^2$ -- consistent with the standard model prediction. The neutron-number dependence of this result, together with that from our previous measurement on CsI, confirms the existence of the \cevns process and provides improved constraints on non-standard neutrino interactions., Comment: 8 pages, 5 figures with 2 pages, 6 figures supplementary material V3: fixes to figs 3,4 V4: fix typo in table 1, V5: replaced missing appendix, V6: fix Eq 1, new fig 3, V7 final version, updated with final revisions

Published
2020
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22. Sensitivity of the COHERENT Experiment to Accelerator-Produced Dark Matter

Author

COHERENT Collaboration, Akimov, D., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Blackston, M. A., Bolozdynya, A., Cabrera-Palmer, B., Chen, N., Conley, E., Cooper, R. L., Daughhetee, J., Coello, M. del Valle, Detwiler, J. A., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Fox, W., Galindo-Uribarri, A., Green, M. P., Hansen, K. S., Heath, M. R., Hedges, S., Johnson, T., Kaemingk, M., Kaufman, L. J., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Li, L., Librande, J. T., Link, J. M., Liu, J., Mann, K., Markoff, D. M., Moreno, H., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S., Pershey, D., Radford, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Rudik, D., Runge, J., Salvat, D. J., Scholberg, K., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovtsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Thornton, R. T., Tolstukhin, I., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Wiseman, C., Wongjirad, T., Yang, J., Yen, Y. -R., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

The COHERENT experiment is well poised to test sub-GeV dark matter models using low-energy recoil detectors sensitive to coherent elastic neutrino-nucleus scattering (CEvNS) in the $\pi$-DAR neutrino beam produced by the Spallation Neutron Source. We show how a planned 750-kg liquid argon scintillation detector would place leading limits on scalar light dark matter models, over two orders of magnitude of dark matter mass, for dark matter particles produced through vector and leptophobic portals in the absence of other effects beyond the standard model. The characteristic timing structure of a $\pi$-DAR beam allows a unique opportunity for constraining systematic uncertainties on the standard model background in a time window where signal is not expected, enhancing expected sensitivity. Additionally, we discuss future prospects, further increasing the discovery potential of CEvNS detectors. Such methods would test the calculated thermal dark matter abundance for all couplings $\alpha'\leq1$ within the vector portal model over an order of magnitude of dark matter masses.

Published
2019
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23. First Constraint on Coherent Elastic Neutrino-Nucleus Scattering in Argon

Author

COHERENT Collaboration, Akimov, D., Albert, J. B., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Blackston, M. A., Bolozdynya, A., Cabrera-Palmer, B., Cervantes, M., Collar, J. I., Cooper, R. L., Daughhetee, J., Coello, M. del Valle, Detwiler, J. A., D'Onofrio, M., Efremenko, Y., Erkela, E. M., Elliott, S. R., Fabris, L., Febbraro, M., Fox, W., Galindo-Uribarri, A., Green, M. P., Hansen, K. S., Heath, M. R., Hedges, S., Johnson, T., Kaemingk, M., Kaufman, L. J., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Li, L., Librande, J. T., Link, J. M., Liu, J., Mann, K., Markoff, D. M., Moreno, H., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S., Pershey, D., Radford, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Rudik, D., Runge, J., Salvat, D. J., Scholberg, K., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovtsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Thornton, R. T., Tolstukhin, I., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Wiseman, C., Wongjirad, T., Yang, J., Yen, Y. -R., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

Coherent elastic neutrino-nucleus scattering (CEvNS) is the dominant neutrino scattering channel for neutrinos of energy $E_\nu < 100$ MeV. We report a limit for this process using data collected in an engineering run of the 29 kg CENNS-10 liquid argon detector located 27.5 m from the Oak Ridge National Laboratory Spallation Neutron Source (SNS) Hg target with $4.2\times 10^{22}$ protons on target. The dataset yielded $< 7.4$ observed CEvNS events implying a cross section for the process, averaged over the SNS pion decay-at-rest flux, of $<3.4 \times 10^{-39}$ cm$^{2}$, a limit within twice the Standard Model prediction. This is the first limit on CEvNS from an argon nucleus and confirms the earlier CsI non-standard neutrino interaction constraints from the collaboration. This run demonstrated the feasibility of the ongoing experimental effort to detect CEvNS with liquid argon.

Published
2019
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24. COHERENT Collaboration data release from the first observation of coherent elastic neutrino-nucleus scattering

Author

COHERENT Collaboration, Akimov, D., Albert, J. B., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Blackston, M. A., Bolozdynya, A., Brown, A., Burenkov, A., Cabrera-Palmer, B., Cervantes, M., Collar, J. I., Cooper, R. J., Cooper, R. L., Cuesta, C., Daughhetee, J., Dean, D. J., Coello, M. del Valle, Detwiler, J., D'Onofrio, M., Eberhardt, A., Efremenko, Y., Elliott, S. R., Etenko, A., Fabris, L., Febbraro, M., Fields, N., Fox, W., Fu, Z., Galindo-Uribarri, A., Green, M. P., Hai, M., Heath, M. R., Hedges, S., Hornback, D., Hossbach, T. W., Iverson, E. B., Kaemingk, M., Kaufman, L. J., Klein, S. R., Khromov, A., Ki, S., Konovalov, A., Kovalenko, A., Kremer, M., Kumpan, A., Leadbetter, C., Li, L., Lu, W., Mann, K., Markoff, D. M., Melikyan, Y., Miller, K., Moreno, H., Mueller, P. E., Naumov, P., Newby, J., Orrell, J. L., Overman, C. T., Parno, D. S., Penttila, S., Perumpilly, G., Radford, D. C., Rapp, R., Ray, H., Raybern, J., Reyna, D., Rich, G. C., Rimal, D., Rudik, D., Salvat, D. J., Scholberg, K., Scholz, B., Sinev, G., Snow, W. M., Sosnovtsev, V., Shakirov, A., Suchyta, S., Suh, B., Tayloe, R., Thornton, R. T., Tolstukhin, I., Vanderwerp, J., Varner, R. L., Virtue, C. J., Wan, Z., Yoo, J., Yu, C. -H., Zawada, A., Zderic, A., and Zettlemoyer, J.

Subjects
Nuclear Experiment, High Energy Physics - Experiment
Abstract

This release includes data and information necessary to perform independent analyses of the COHERENT result presented in Akimov et al., arXiv:1708.01294 [nucl-ex]. Data is shared in a binned, text-based format, including both "signal" and "background" regions, so that counts and associated uncertainties can be quantitatively calculated for the purpose of separate analyses. This document describes the included information and its format, offering some guidance on use of the data. Accompanying code examples show basic interaction with the data using Python.

Published
2018
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25. COHERENT 2018 at the Spallation Neutron Source

Author

Akimov, D., Albert, J. B., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Blackston, M. A., Bolozdynya, A., Brown, A., Burenkov, A., Cabrera-Palmer, B., Cervantes, M., Collar, J. I., Cooper, R. J., Cooper, R. L., Daughhetee, J., Dean, D. J., Coello, M. del Valle, Detwiler, J. A., D'Onofrio, M., Efremenko, Y., Elliott, S. R., Erkela, E., Etenko, A., Fabris, L., Febbraro, M., Fields, N., Fox, W., Galindo-Uribarri, A., Green, M. P., Heath, M. R., Hedges, S., Iverson, E. B., Kaemingk, M., Kaufman, L. J., Klein, S. R., Khromov, A., Ki, S., Konovalov, A., Kovalenko, A., Kumpan, A., Li, L., Lu, W., Mann, K., Melikyan, Y., Markoff, D. M., Moreno, H., Mueller, P. E., Naumov, P., Newby, J., Parno, D. S., Penttila, S., Perumpilly, G., Radford, D., Rapp, R., Ray, H., Raybern, J., Reyna, D., Rich, G. C., Rimal, D., Rudik, D., Salvat, D. J., Scholberg, K., Scholz, B., Sinev, G., Snow, W. M., Sosnovtsev, V., Shakirov, A., Suh, B., Tayloe, R., Thornton, R. T., Tolstukhin, I., Vanderwerp, J., Varner, R. L., Virtue, C. J., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

The primary goal of the COHERENT collaboration is to measure and study coherent elastic neutrino-nucleus scattering (CEvNS) using the high-power, few-tens-of-MeV, pulsed source of neutrinos provided by the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL). The COHERENT collaboration reported the first detection of CEvNS [Akimov:2017ade] using a CsI[Na] detector. At present the collaboration is deploying four detector technologies: a CsI[Na] scintillating crystal, p-type point-contact germanium detectors, single-phase liquid argon, and NaI[Tl] crystals. All detectors are located in the neutron-quiet basement of the SNS target building at distances 20-30 m from the SNS neutrino source. The simultaneous measurement in all four COHERENT detector subsystems will test the $N^2$ dependence of the cross section and search for new physics. In addition, COHERENT is measuring neutrino-induced neutrons from charged- and neutral-current neutrino interactions on nuclei in shielding materials, which represent a non-negligible background for CEvNS as well as being of intrinsic interest. The Collaboration is planning as well to look for charged-current interactions of relevance to supernova and weak-interaction physics. This document describes concisely the COHERENT physics motivations, sensitivity, and next plans for measurements at the SNS to be accomplished on a few-year timescale., Comment: 22 pages, 14 figures

Published
2018

27. Observation of Coherent Elastic Neutrino-Nucleus Scattering

Author

Akimov, D., Albert, J. B., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Brown, A., Bolozdynya, A., Cabrera-Palmer, B., Cervantes, M., Collar, J. I., Cooper, R. J., Cooper, R. L., Cuesta, C., Dean, D. J., Detwiler, J. A., Eberhardt, A., Efremenko, Y., Elliott, S. R., Erkela, E. M., Fabris, L., Febbraro, M., Fields, N. E., Fox, W., Fu, Z., Galindo-Uribarri, A., Green, M. P., Hai, M., Heath, M. R., Hedges, S., Hornback, D., Hossbach, T. W., Iverson, E. B., Kaufman, L. J., Ki, S., Klein, S. R., Khromov, A., Konovalov, A., Kremer, M., Kumpan, A., Leadbetter, C., Li, L., Lu, W., Mann, K., Markoff, D. M., Miller, K., Moreno, H., Mueller, P. E., Newby, J., Orrell, J. L., Overman, C. T., Parno, D. S., Penttila, S., Perumpilly, G., Ray, H., Raybern, J., Reyna, D., Rich, G. C., Rimal, D., Rudik, D., Scholberg, K., Scholz, B. J., Sinev, G., Snow, W. M., Sosnovtsev, V., Shakirov, A., Suchyta, S., Suh, B., Tayloe, R., Thornton, R. T., Tolstukhin, I., Vanderwerp, J., Varner, R. L., Virtue, C. J., Wan, Z., Yoo, J., Yu, C. -H., Zawada, A., Zettlemoyer, J., and Zderic, A. M.

Subjects
Nuclear Experiment, High Energy Physics - Experiment, High Energy Physics - Phenomenology, Nuclear Theory
Abstract

The coherent elastic scattering of neutrinos off nuclei has eluded detection for four decades, even though its predicted cross-section is the largest by far of all low-energy neutrino couplings. This mode of interaction provides new opportunities to study neutrino properties, and leads to a miniaturization of detector size, with potential technological applications. We observe this process at a 6.7-sigma confidence level, using a low-background, 14.6-kg CsI[Na] scintillator exposed to the neutrino emissions from the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory. Characteristic signatures in energy and time, predicted by the Standard Model for this process, are observed in high signal-to-background conditions. Improved constraints on non-standard neutrino interactions with quarks are derived from this initial dataset.

Published
2017
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28. Measurement of the beam asymmetry $\Sigma$ for $\pi^0$ and $\eta$ photoproduction on the proton at $E_\gamma = 9$ GeV

Author

GlueX Collaboration, Ghoul, H. Al, Anassontzis, E. G., Austregesilo, A., Barbosa, F., Barnes, A., Beattie, T. D., Bennett, D. W., Berdnikov, V. V., Black, T., Boeglin, W., Briscoe, W. J., Brooks, W. K., Cannon, B. E., Chernyshov, O., Chudakov, E., Crede, V., Dalton, M. M., Deur, A., Dobbs, S., Dolgolenko, A., Dugger, M., Dzhygadlo, R., Egiyan, H., Eugenio, P., Fanelli, C., Foda, A. M., Frye, J., Furletov, S., Gan, L., Gasparian, A., Gerasimov, A., Gevorgyan, N., Goetzen, K., Goryachev, V. S., Guo, L., Hakobyan, H., Hardin, J., Henderson, A., Huber, G. M., Ireland, D. G., Ito, M. M., Jarvis, N. S., Jones, R. T., Kakoyan, V., Kamel, M., Klein, F. J., Kliemt, R., Kourkoumeli, C., Kuleshov, S., Kuznetsov, I., Lara, M., Larin, I., Lawrence, D., Levine, W. I., Livingston, K., Lolos, G. J., Lyubovitskij, V., Mack, D., Mattione, P. T., Matveev, V., McCaughan, M., McCracken, M., McGinley, W., McIntyre, J., Mendez, R., Meyer, C. A., Miskimen, R., Mitchell, R. E., Mokaya, F., Moriya, K., Nerling, F., Nigmatkulov, G., Ochoa, N., Ostrovidov, A. I., Papandreou, Z., Patsyuk, M., Pedroni, R., Pennington, M. R., Pentchev, L., Peters, K. J., Pooser, E., Pratt, B., Qiang, Y., Reinhold, J., Ritchie, B. G., Robison, L., Romanov, D., Salgado, C., Schumacher, R. A., Schwarz, C., Schwiening, J., Semenov, A. Yu., Semenova, I. A., Seth, K. K., Shepherd, M. R., Smith, E. S., Sober, D. I., Somov, A., Somov, S., Soto, O., Sparks, N., Staib, M. J., Stevens, J. R., Strakovsky, I. I., Subedi, A., Tarasov, V., Taylor, S., Teymurazyan, A., Tolstukhin, I., Tomaradze, A., Toro, A., Tsaris, A., Vasileiadis, G., Vega, I., Walford, N. K., Werthmuller, D., Whitlatch, T., Williams, M., Wolin, E., Xiao, T., Zarling, J., Zhang, Z., Zihlmann, B., Mathieu, V., and Nys, J.

Subjects
Nuclear Experiment
Abstract

We report measurements of the photon beam asymmetry $\Sigma$ for the reactions $\vec{\gamma}p\to p\pi^0$ and $\vec{\gamma}p\to p\eta $ from the GlueX experiment using a 9 GeV linearly-polarized, tagged photon beam incident on a liquid hydrogen target in Jefferson Lab's Hall D. The asymmetries, measured as a function of the proton momentum transfer, possess greater precision than previous $\pi^0$ measurements and are the first $\eta$ measurements in this energy regime. The results are compared with theoretical predictions based on $t$-channel, quasi-particle exchange and constrain the axial-vector component of the neutral meson production mechanism in these models., Comment: 6 pages, 6 figures, Published in Physical Review C: Rapid Communication

Published
2017
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29. Observation of coherent elastic neutrino-nucleus scattering

Author

Akimov, D, Albert, JB, An, P, Awe, C, Barbeau, PS, Becker, B, Belov, V, Brown, A, Bolozdynya, A, Cabrera-Palmer, B, Cervantes, M, Collar, JI, Cooper, RJ, Cooper, RL, Cuesta, C, Dean, DJ, Detwiler, JA, Eberhardt, A, Efremenko, Y, Elliott, SR, Erkela, EM, Fabris, L, Febbraro, M, Fields, NE, Fox, W, Fu, Z, Galindo-Uribarri, A, Green, MP, Hai, M, Heath, MR, Hedges, S, Hornback, D, Hossbach, TW, Iverson, EB, Kaufman, LJ, Ki, S, Klein, SR, Khromov, A, Konovalov, A, Kremer, M, Kumpan, A, Leadbetter, C, Li, L, Lu, W, Mann, K, Markoff, DM, Miller, K, Moreno, H, Mueller, PE, Newby, J, Orrell, JL, Overman, CT, Parno, DS, Penttila, S, Perumpilly, G, Ray, H, Raybern, J, Reyna, D, Rich, GC, Rimal, D, Rudik, D, Scholberg, K, Scholz, BJ, Sinev, G, Snow, WM, Sosnovtsev, V, Shakirov, A, Suchyta, S, Suh, B, Tayloe, R, Thornton, RT, Tolstukhin, I, Vanderwerp, J, Varner, RL, Virtue, CJ, Wan, Z, Yoo, J, Yu, C-H, Zawada, A, Zettlemoyer, J, Zderic, AM, and Collaboration, COHERENT

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, COHERENT Collaboration, nucl-ex, hep-ex, hep-ph, nucl-th, General Science & Technology
Abstract

The coherent elastic scattering of neutrinos off nuclei has eluded detection for four decades, even though its predicted cross section is by far the largest of all low-energy neutrino couplings. This mode of interaction offers new opportunities to study neutrino properties and leads to a miniaturization of detector size, with potential technological applications. We observed this process at a 6.7σ confidence level, using a low-background, 14.6-kilogram CsI[Na] scintillator exposed to the neutrino emissions from the Spallation Neutron Source at Oak Ridge National Laboratory. Characteristic signatures in energy and time, predicted by the standard model for this process, were observed in high signal-to-background conditions. Improved constraints on nonstandard neutrino interactions with quarks are derived from this initial data set.

Published
2017

30. First Results from The GlueX Experiment

Author

The GlueX Collaboration, Ghoul, H. Al, Anassontzis, E. G., Barbosa, F., Barnes, A., Beattie, T. D., Bennett, D. W., Berdnikov, V. V., Black, T., Boeglin, W., Brooks, W. K., Cannon, B., Chernyshov, O., Chudakov, E., Crede, V., Dalton, M. M., Deur, A., Dobbs, S., Dolgolenko, A., Dugger, M., Egiyan, H., Eugenio, P., Foda, A. M., Frye, J., Furletov, S., Gan, L., Gasparian, A., Gerasimov, A., Gevorgyan, N., Goryachev, V. S., Guegan, B., Guo, L., Hakobyan, H., Hakobyan2, H., Hardin, J., Huber, G. M., Ireland, D., Ito, M. M., Jarvis, N. S., Jones, R. T., Kakoyan, V., Kamel, M., Klein, F. J., Kourkoumeli, C., Kuleshov, S., Lara, M., Larin, I., Lawrence, D., Leckey, J., Levine, W. I., Livingston, K., Lolos, G. J., Mack, D., Mattione, P. T., Matveev, V., McCaughan, M., McGinley, W., McIntyre, J., Mendez, R., Meyer, C. A., Miskimen, R., Mitchell, R. E., Mokaya, F., Moriya, K., Nigmatkulov, G., Ochoa, N., Ostrovidov, A. I., Papandreou, Z., Pedroni, R., Pennington, M., Pentchev, L., Ponosov, A., Pooser, E., Pratt, B., Qiang, Y., Reinhold, J., Ritchie, B. G., Robison, L., Romanov, D., Salgado, C., Schumacher, R. A., Semenov, A. Yu., Semenova, I. A., Senderovich, I., Seth, K. K., Shepherd, M. R., Smith, E. S., Sober, D. I., Somov, A., Somov, S., Soto, O., Sparks, N., Staib, M. J., Stevens, J. R., Subedi, A., Tarasov, V., Taylor, S., Tolstukhin, I., Tomaradze, A., Toro, A., Tsaris, A., Vasileiadis, G., Vega, I., Voulgaris, G., Walford, N. K., Whitlatch, T., Williams, M., Wolin, E., Xiao, T., Zarling, J., and Zihlmann, B.

Subjects
Nuclear Experiment, High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

The GlueX experiment at Jefferson Lab ran with its first commissioning beam in late 2014 and the spring of 2015. Data were collected on both plastic and liquid hydrogen targets, and much of the detector has been commissioned. All of the detector systems are now performing at or near design specifications and events are being fully reconstructed, including exclusive production of $\pi^{0}$, $\eta$ and $\omega$ mesons. Linearly-polarized photons were successfully produced through coherent bremsstrahlung and polarization transfer to the $\rho$ has been observed., Comment: 8 pages, 6 figures, Invited contribution to the Hadron 2015 Conference, Newport News VA, September 2015

Published
2015
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31. A study of decays to strange final states with GlueX in Hall D using components of the BaBar DIRC

Author

The GlueX Collaboration, Dugger, M., Ritchie, B., Senderovich, I., Anassontzis, E., Ioannou, P., Kourkoumeli, C., Vasileiadis, G., Voulgaris, G., Jarvis, N., Levine, W., Mattione, P., McGinley, W., Meyer, C. A., Schumacher, R., Staib, M., Klein, F., Sober, D., Sparks, N., Walford, N., Doughty, D., Barnes, A., Jones, R., McIntyre, J., Mokaya, F., Pratt, B., Boeglin, W., Guo, L., Pooser, E., Reinhold, J., Ghoul, H. Al, Crede, V., Eugenio, P., Ostrovidov, A., Tsaris, A., Ireland, D., Livingston, K., Bennett, D., Bennett, J., Frye, J., Lara, M., Leckey, J., Mitchell, R., Moriya, K., Shepherd, M. R., Chernyshov, O., Dolgolenko, A., Gerasimov, A., Goryachev, V., Larin, I., Matveev, V., Tarasov, V., Barbosa, F., Chudakov, E., Dalton, M., Deur, A., Dudek, J., Egiyan, H., Furletov, S., Ito, M., Mack, D., Lawrence, D., McCaughan, M., Pennington, M., Pentchev, L., Qiang, Y., Smith, E., Somov, A., Taylor, S., Whitlatch, T., Zihlmann, B., Miskimen, R., Guegan, B., Hardin, J., Stevens, J., Williams, M., Berdnikov, V., Nigmatkulov, G., Ponosov, A., Romanov, D., Somov, S., Tolstukhin, I., Salgado, C., Ambrozewicz, P., Gasparian, A., Pedroni, R., Black, T., Gan, L., Dobbs, S., Seth, K., Ting, X., Tomaradze, A., Beattie, T., Huber, G., Lolos, G., Papandreou, Z., Semenov, A., Semenova, I., Brooks, W., Hakobyan, H., Kuleshov, S., Soto, O., Toro, A., Vega, I., Gevorgyan, N., and Kakoyan, V.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

We propose to enhance the kaon identification capabilities of the GlueX detector by constructing an FDIRC (Focusing Detection of Internally Reflected Cherenkov) detector utilizing the decommissioned BaBar DIRC components. The GlueX FDIRC would significantly enhance the GlueX physics program by allowing one to search for and study hybrid mesons decaying into kaon final states. Such systematic studies of kaon final states are essential for inferring the quark flavor content of hybrid and conventional mesons. The GlueX FDIRC would reuse one-third of the synthetic fused silica bars that were utilized in the BaBar DIRC. A new focussing photon camera, read out with large area photodetectors, would be developed. We propose operating the enhanced GlueX detector in Hall D for a total of 220 days at an average intensity of 5x10^7 {\gamma}/s, a program that was conditionally approved by PAC39, Comment: 25 pages, 29 figures

Published
2014

32. 40Ar proposed as probe of neutron-induced reactions in a high-density stellar-like plasma at the National Ignition Facility

Author

Paul M., Sahoo R. N., Tessler M., Jeet J., Velsko C., Zylstra A., Avila M., Dickerson C., Fougères C., Jayatissa H., Pardo R. C., Rehm K. E., Scott R., Tolstukhin I., Vondrasek R., Bailey T., Callahan L., Clark A. M., Collon P., Kashiv Y., Nelson A., Köster U., Hoffmann H. F. R., Pichotta M., Zuber K., Döring T., and Schwengner R.

Subjects
Physics, QC1-999
Abstract

The thermodynamical conditions and the neutron density produced in a laser-induced implosion of a deuterium-tritium (DT) filled capsule at the National Ignition Facility (NIF) are the closest laboratory analog of stellar conditions. We plan to investigate neutron-induced reactions on 40Ar, namely the 40Ar(n, 2n)39Ar(t1/2 =268 y), the 40Ar(n, γ)41Ar(110 min) and the potential rapid two-neutron capture reaction 40Ar(2n, γ)42Ar(33 y) in an Ar-loaded DT capsule. The chemical inertness of noble gas Ar enables reliable collection of the reaction products.

Published
2023
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33. The 41Ar(n,y)42Ar reaction

Author

Sahoo R. N., Paul M., Köster U., Scott R., Tessler M., Zylstra A., Avila M. L., Dickerson C., Jayatissa H., Kohen M.S., McLain J., Pardo R.C., Rehm K. E., Tolstukhin I., Vondrasek R., Bailey T., Callahan L., Clark A., Collon P., Kashiv Y., and Nelson A.

Subjects
Physics, QC1-999
Abstract

The cross-section of the thermal neutron capture 41Ar(n,γ)42Ar(t1/2=32.9 y) reaction was measured by irradiating a 40Ar sample at the high-flux reactor of Institut Laue-Langevin (ILL) Grenoble, France. The signature of the two-neutron capture has been observed by measuring the growth curve and identifying the 1524.6 keV γ-lines of the shorter-lived 42K(12.4 h) β− daughter of 42Ar. Our preliminary value of the 41Ar(n,γ)42Ar thermal cross section is 240(80) mb at 25.3 meV. For the first time, direct counting of 42Ar was performed using the ultra-high sensitivity technique of noble gas accelerator mass spectrometry (NOGAMS) at Argonne National Laboratory, USA.

Published
2023
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34. Direct Determination of Fission-Barrier Heights Using Light-Ion Transfer in Inverse Kinematics

Author

Bennett, S. A., primary, Garrett, K., additional, Sharp, D. K., additional, Freeman, S. J., additional, Smith, A. G., additional, Wright, T. J., additional, Kay, B. P., additional, Tang, T. L., additional, Tolstukhin, I. A., additional, Ayyad, Y., additional, Chen, J., additional, Davies, P. J., additional, Dolan, A., additional, Gaffney, L. P., additional, Heinz, A., additional, Hoffman, C. R., additional, Müller-Gatermann, C., additional, Page, R. D., additional, and Wilson, G. L., additional

Published
2023
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35. First Probe of Sub-GeV Dark Matter beyond the Cosmological Expectation with the COHERENT CsI Detector at the SNS

Author

Akimov, D., primary, An, P., additional, Awe, C., additional, Barbeau, P. S., additional, Becker, B., additional, Belov, V., additional, Bernardi, I., additional, Blackston, M. A., additional, Bock, C., additional, Bolozdynya, A., additional, Browning, J., additional, Cabrera-Palmer, B., additional, Chernyak, D., additional, Conley, E., additional, Daughhetee, J., additional, Detwiler, J., additional, Ding, K., additional, Durand, M. R., additional, Efremenko, Y., additional, Elliott, S. R., additional, Fabris, L., additional, Febbraro, M., additional, Gallo Rosso, A., additional, Galindo-Uribarri, A., additional, Green, M. P., additional, Heath, M. R., additional, Hedges, S., additional, Hoang, D., additional, Hughes, M., additional, Johnson, T., additional, Khromov, A., additional, Konovalov, A., additional, Kozlova, E., additional, Kumpan, A., additional, Li, L., additional, Link, J. M., additional, Liu, J., additional, Mann, K., additional, Markoff, D. M., additional, Mastroberti, J., additional, Mueller, P. E., additional, Newby, J., additional, Parno, D. S., additional, Penttila, S. I., additional, Pershey, D., additional, Rapp, R., additional, Raybern, J., additional, Razuvaeva, O., additional, Reyna, D., additional, Rich, G. C., additional, Ross, J., additional, Rudik, D., additional, Runge, J., additional, Salvat, D. J., additional, Salyapongse, A. M., additional, Sander, J., additional, Scholberg, K., additional, Shakirov, A., additional, Simakov, G., additional, Sinev, G., additional, Snow, W. M., additional, Sosnovtsev, V., additional, Suh, B., additional, Tayloe, R., additional, Tellez-Giron-Flores, K., additional, Tolstukhin, I., additional, Ujah, E., additional, Vanderwerp, J., additional, Varner, R. L., additional, Virtue, C. J., additional, Visser, G., additional, Wongjirad, T., additional, Yen, Y.-R., additional, Yoo, J., additional, Yu, C.-H., additional, and Zettlemoyer, J., additional

Published
2023
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38. The RED-100 two-phase emission detector

Author

Akimov, D. Yu., Aleksandrov, I. S., Belov, V. A., Bolozdynya, A. I., Burenkov, A. A., Vlasik, K. F., Gusakov, Yu. V., Dmitrenko, V. V., Dolgolenko, A. G., Efremenko, Yu. V., Kaplin, V. A., Kovalenko, A. G., Kozlova, E. S., Konovalov, A. M., Krakhmalova, T. D., Kumpan, A. V., Melikyan, Yu. A., Naumov, P. P., Rudik, D. G., Saldikov, I. S., Sosnovtsev, V. V., Tikhomirov, G. V., Tobolkin, A. A., Tolstukhin, I. A., Khromov, A. V., Uteshev, Z. M., Shakirov, A. V., Shafigullin, R. R., and Etenko, A. V.

Published
2017
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39. The 41Ar(n,y)42Ar reaction.

Author

Sahoo, R. N., Paul, M., Köster, U., Scott, R., Tessler, M., Zylstra, A., Avila, M. L., Dickerson, C., Jayatissa, H., Kohen, M.S., McLain, J., Pardo, R.C., Rehm, K. E., Tolstukhin, I., Vondrasek, R., Bailey, T., Callahan, L., Clark, A., Collon, P., and Kashiv, Y.

Subjects
NUCLEAR cross sections, THERMAL neutron capture, ARGON isotopes, NUCLEAR reactors, MASS spectrometry
Abstract

The cross-section of the thermal neutron capture 41Ar(n,γ)42Ar(t1/2=32.9 y) reaction was measured by irradiating a 40Ar sample at the high-flux reactor of Institut Laue-Langevin (ILL) Grenoble, France. The signature of the two-neutron capture has been observed by measuring the growth curve and identifying the 1524.6 keV γ-lines of the shorter-lived 42K(12.4 h) β− daughter of 42Ar. Our preliminary value of the 41Ar(n,γ)42Ar thermal cross section is 240(80) mb at 25.3 meV. For the first time, direct counting of 42Ar was performed using the ultra-high sensitivity technique of noble gas accelerator mass spectrometry (NOGAMS) at Argonne National Laboratory, USA. [ABSTRACT FROM AUTHOR]

Published
2023
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40. Probing the quadrupole transition strength of C15 via deuteron inelastic scattering

Author

Chen, J., primary, Kay, B. P., additional, Tang, T. L., additional, Tolstukhin, I. A., additional, Hoffman, C. R., additional, Li, H., additional, Yin, P., additional, Zhao, X., additional, Maris, P., additional, Vary, J. P., additional, Li, G., additional, Lou, J. L., additional, Avila, M. L., additional, Ayyad, Y., additional, Bennett, S., additional, Bazin, D., additional, Clark, J. A., additional, Freeman, S. J., additional, Jayatissa, H., additional, Müller-Gatermann, C., additional, Munoz-Ramos, A., additional, Santiago-Gonzalez, D., additional, Sharp, D. K., additional, Wuosmaa, A. H., additional, and Yuan, C. X., additional

Published
2022
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41. Probing the quadrupole transition strength of $^{15}$C via deuteron inelastic scattering

Author

Chen, J., Kay, B. P., Tang, T. L., Tolstukhin, I. A., Hoffman, C. R., Li, H., Yin, P., Zhao, X., Maris, P., Vary, J. P., Li, G., Lou, J. L., Avila, M. L., Ayyad, Y., Bennett, S., Bazin, D., Clark, J. A., Freeman, S. J., Jayatissa, H., Müller-Gatermann, C., Munoz, A., Santiago-Gonzalez, D., Sharp, D. K., Wuosmaa, A. H., and Yuan, C. X.

Subjects
FOS: Physical sciences, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), nucl-ex, Nuclear Experiment
Abstract

Deuteron elastic scattering from $^{15}$C and inelastic scattering reactions to the first excited state of $^{15}$C were studied using a radioactive beam of $^{15}$C in inverse kinematics. The scattered deuterons were measured using HELIOS. The elastic scattering differential cross sections were analyzed using the optical model. A matter deformation length δd = 1.04(11) fm has been extracted from the differential cross sections of inelastic scattering to the first excited state. The ratio of neutron and proton matrix elements Mn/Mp = 3.6(4) has been determined from this quadrupole transition. Neutron effective charges and core-polarization parameters of $^{15}$C were determined and discussed. Results from ab initio no-core configuration interaction calculations were also compared with the experimental observations. This result supports a moderate core decoupling effect of the valence neutron in $^{15}$C similarly to its isotone $^{17}$O, in line with the interpretation of other neutron-rich carbon isotopes. Deuteron elastic scattering from 15C and inelastic scattering reactions to the first excited state of 15C were studied using a radioactive beam of 15C in inverse kinematics. The scattered deuterons were measured using HELIOS. The elastic scattering differential cross sections were analyzed using the optical model. A matter deformation length δd = 1.04(11) fm has been extracted from the differential cross sections of inelastic scattering to the first excited state. The ratio of neutron and proton matrix elements Mn/Mp = 3.6(4) has been determined from this quadrupole transition. Neutron effective charges and core-polarization parameters of 15C were determined and discussed. Results from ab-initio no-core configuration interaction calculations were also compared with the experimental observations. This result supports a moderate core decoupling effect of the valence neutron in 15C similarly to its isotone 17O, in line with the interpretation of other neutron-rich carbon isotopes.

Published
2022

42. Simulating the neutrino flux from the Spallation Neutron Source for the COHERENT experiment

Author

Akimov, D., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Bernardi, I., Blackston, M. A., Bock, C., Bolozdynya, A., Browning, J., Cabrera-Palmer, B., Chernyak, D., Conley, E., Daughhetee, J., Detwiler, J., Ding, K., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Galambos, J., Gallo Rosso, A., Galindo-Uribarri, A., Green, M. P., Heath, M. R., Hedges, S., Hoang, D., Hughes, M., Iverson, E., Johnson, T., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Li, L., Link, J. M., Liu, J., Mann, K., Markoff, D. M., Mastroberti, J., McIntyre, M., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S. I., Pershey, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Rimal, D., Ross, J., Rudik, D., Runge, J., Salvat, D. J., Salyapongse, A. M., Scholberg, K., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovstsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Tolstukhin, I., Trotter, S., Ujah, E., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Wongjirad, T., Yen, Y.R., Yoo, J., Yu, C.H., Zettlemoyer, J., and Zhang, S.

Abstract

The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory is a pulsed source of neutrons and, as a by-product of this operation, an intense source of pulsed neutrinos via stopped-pion decay. The COHERENT collaboration uses this source to investigate coherent elastic neutrino-nucleus scattering and other physics with a suite of detectors. This work includes a description of our geant4 simulation of neutrino production at the SNS and the flux calculation which informs the COHERENT studies. We estimate the uncertainty of this calculation at the ∼10% level based on validation against available low-energy π+ production data.

Published
2022
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44. Quenching of Single-Particle Strength in A=15 Nuclei

Author

Kay, B. P., primary, Tang, T. L., additional, Tolstukhin, I. A., additional, Roderick, G. B., additional, Mitchell, A. J., additional, Ayyad, Y., additional, Bennett, S. A., additional, Chen, J., additional, Chipps, K. A., additional, Crawford, H. L., additional, Freeman, S. J., additional, Garrett, K., additional, Gott, M. D., additional, Hall, M. R., additional, Hoffman, C. R., additional, Jayatissa, H., additional, Macchiavelli, A. O., additional, MacGregor, P. T., additional, Sharp, D. K., additional, and Wilson, G. L., additional

Published
2022
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45. Measurement of scintillation response of CsI[Na] to low-energy nuclear recoils by COHERENT

Author

Akimov, D., primary, An, P., additional, Awe, C., additional, Barbeau, P.S., additional, Becker, B., additional, Belov, V., additional, Bernardi, I., additional, Blackston, M.A., additional, Bock, C., additional, Bolozdynya, A., additional, Browning, J., additional, Cabrera-Palmer, B., additional, Chernyak, D., additional, Conley, E., additional, Daughhetee, J., additional, Detwiler, J., additional, Ding, K., additional, Durand, M.R., additional, Efremenko, Y., additional, Elliott, S.R., additional, Fabris, L., additional, Febbraro, M., additional, Gallo Rosso, A., additional, Galindo-Uribarri, A., additional, Green, M.P., additional, Heath, M.R., additional, Hedges, S., additional, Hoang, D., additional, Hughes, M., additional, Johnson, T., additional, Khromov, A., additional, Konovalov, A., additional, Kozlova, E., additional, Kumpan, A., additional, Li, L., additional, Link, J.M., additional, Liu, J., additional, Mann, K., additional, Markoff, D.M., additional, Mastroberti, J., additional, Melikyan, Y.A., additional, Mueller, P.E., additional, Newby, J., additional, Parno, D.S., additional, Penttila, S.I., additional, Pershey, D., additional, Rapp, R., additional, Ray, H., additional, Raybern, J., additional, Razuvaeva, O., additional, Reyna, D., additional, Rich, G.C., additional, Ross, J., additional, Rudik, D., additional, Runge, J., additional, Salvat, D.J., additional, Salyapongse, A.M., additional, Scholberg, K., additional, Shakirov, A., additional, Simakov, G., additional, Sinev, G., additional, Snow, W.M., additional, Sosnovtsev, V., additional, Suh, B., additional, Tayloe, R., additional, Tellez-Giron-Flores, K., additional, Tolstukhin, I., additional, Ujah, E., additional, Vanderwerp, J., additional, Varner, R.L., additional, Virtue, C.J., additional, Visser, G., additional, Wongjirad, T., additional, Yen, Y.-R., additional, Yoo, J., additional, Yu, C.-H., additional, and Zettlemoyer, J., additional

Published
2022
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46. COHERENT constraint on leptophobic dark matter using CsI data

Author

Akimov, D., primary, An, P., additional, Awe, C., additional, Barbeau, P. S., additional, Becker, B., additional, Belov, V., additional, Bernardi, I., additional, Blackston, M. A., additional, Bock, C., additional, Bolozdynya, A., additional, Bouabid, R., additional, Browning, J., additional, Cabrera-Palmer, B., additional, Chernyak, D., additional, Conley, E., additional, Daughhetee, J., additional, Detwiler, J., additional, Ding, K., additional, Durand, M. R., additional, Efremenko, Y., additional, Elliott, S. R., additional, Fabris, L., additional, Febbraro, M., additional, Gallo Rosso, A., additional, Galindo-Uribarri, A., additional, Green, M. P., additional, Heath, M. R., additional, Hedges, S., additional, Hoang, D., additional, Hughes, M., additional, Johnson, B. A., additional, Johnson, T., additional, Khromov, A., additional, Konovalov, A., additional, Kozlova, E., additional, Kumpan, A., additional, Li, L., additional, Link, J. M., additional, Liu, J., additional, Major, A., additional, Mann, K., additional, Markoff, D. M., additional, Mastroberti, J., additional, Mattingly, J., additional, Mueller, P. E., additional, Newby, J., additional, Parno, D. S., additional, Penttila, S. I., additional, Pershey, D., additional, Prior, C., additional, Rapp, R., additional, Ray, H., additional, Razuvaeva, O., additional, Reyna, D., additional, Rich, G. C., additional, Ross, J., additional, Rudik, D., additional, Runge, J., additional, Salvat, D. J., additional, Salyapongse, A. M., additional, Sander, J., additional, Scholberg, K., additional, Shakirov, A., additional, Simakov, G., additional, Snow, W. M., additional, Sosnovstsev, V., additional, Suh, B., additional, Tayloe, R., additional, Tellez-Giron-Flores, K., additional, Tolstukhin, I., additional, Ujah, E., additional, Vanderwerp, J., additional, Varner, R. L., additional, Virtue, C. J., additional, Visser, G., additional, Wongjirad, T., additional, Yen, Y.-R., additional, Yoo, J., additional, Yu, C.-H., additional, and Zettlemoyer, J., additional

Published
2022
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47. 40Ar proposed as probe of neutron-induced reactions in a high-density stellar-like plasma at the National Ignition Facility.

Author

Paul, M., Sahoo, R. N., Tessler, M., Jeet, J., Velsko, C., Zylstra, A., Avila, M., Dickerson, C., Fougères, C., Jayatissa, H., Pardo, R. C., Rehm, K. E., Scott, R., Tolstukhin, I., Vondrasek, R., Bailey, T., Callahan, L., Clark, A. M., Collon, P., and Kashiv, Y.

Subjects
NEUTRON capture, NUCLEAR reactions, NUCLEAR astrophysics, NUCLEOSYNTHESIS, DEUTERIUM
Abstract

The thermodynamical conditions and the neutron density produced in a laser-induced implosion of a deuterium-tritium (DT) filled capsule at the National Ignition Facility (NIF) are the closest laboratory analog of stellar conditions. We plan to investigate neutron-induced reactions on 40Ar, namely the 40Ar(n, 2n)39Ar(t1/2 =268 y), the 40Ar(n, γ)41Ar(110 min) and the potential rapid two-neutron capture reaction 40Ar(2n, γ)42Ar(33 y) in an Ar-loaded DT capsule. The chemical inertness of noble gas Ar enables reliable collection of the reaction products. [ABSTRACT FROM AUTHOR]

Published
2023
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49. Experimental study of the isomeric state in N16 using the Ng,m16(d,He3) reaction

Author

Tang, T. L., primary, Hoffman, C. R., additional, Kay, B. P., additional, Tolstukhin, I. A., additional, Almaraz-Calderon, S., additional, Asher, B. W., additional, Avila, M. L., additional, Ayyad, Y., additional, Brown, K. W., additional, Bazin, D., additional, Chen, J., additional, Chipps, K. A., additional, Copp, P. A., additional, Hall, M., additional, Jayatissa, H., additional, Ong, H. J., additional, Santiago-Gonzalez, D., additional, Sharp, D. K., additional, Song, J., additional, Stolze, S., additional, Wilson, G. L., additional, and Wu, J., additional

Published
2022
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50. Measurement of scintillation response of CsI[Na] to low-energy nuclear recoils by COHERENT

Author

Akimov, D., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Bernardi, I., Blackston, M. A., Bock, C., Bolozdynya, A., Browning, J., Cabrera-Palmer, B., Chernyak, D., Conley, E., Daughhetee, J., Detwiler, J., Ding, K., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Rosso, A. Gallo, Galindo-Uribarri, A., Green, M. P., Heath, M. R., Hedges, S., Hoang, D., Hughes, M., Johnson, T., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Li, L., Link, Jonathan M., Liu, J., Mann, K., Markoff, D. M., Mastroberti, J., Melikyan, Y. A., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S. I., Pershey, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Ross, J., Rudik, D., Runge, J., Salvat, D. J., Salyapongse, A. M., Scholberg, K., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovtsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Tolstukhin, I., Ujah, E., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Wongjirad, T., Yen, Y. -R., Yoo, J., Yu, C. -H., Zettlemoyer, J., Akimov, D., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Bernardi, I., Blackston, M. A., Bock, C., Bolozdynya, A., Browning, J., Cabrera-Palmer, B., Chernyak, D., Conley, E., Daughhetee, J., Detwiler, J., Ding, K., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Rosso, A. Gallo, Galindo-Uribarri, A., Green, M. P., Heath, M. R., Hedges, S., Hoang, D., Hughes, M., Johnson, T., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Li, L., Link, Jonathan M., Liu, J., Mann, K., Markoff, D. M., Mastroberti, J., Melikyan, Y. A., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S. I., Pershey, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Ross, J., Rudik, D., Runge, J., Salvat, D. J., Salyapongse, A. M., Scholberg, K., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovtsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Tolstukhin, I., Ujah, E., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Wongjirad, T., Yen, Y. -R., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

Abstract

We present results of several measurements of CsI[Na] scintillation response to 3-60 keV energy nuclear recoils performed by the COHERENT collaboration using tagged neutron elastic scattering experiments and an endpoint technique. Earlier results, used to estimate the coherent elastic neutrino-nucleus scattering (CEvNS) event rate for the first observation of this process achieved by COHERENT at the Spallation Neutron Source (SNS), have been reassessed. We discuss corrections for the identified systematic effects and update the respective uncertainty values. The impact of updated results on future precision tests of CEvNS is estimated. We scrutinize potential systematic effects that could affect each measurement. In particular we confirm the response of the H11934-200 Hamamatsu photomultiplier tube (PMT) used for the measurements presented in this study to be linear in the relevant signal scale region.

Published
2022

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