Mihaela Parvu, Piotr Krawczun, Vitaly A. Kudryavtsev
{"title":"Optimised neutron yield calculations from ($α,n$) reactions with the modified SOURCES4 code","authors":"Mihaela Parvu, Piotr Krawczun, Vitaly A. Kudryavtsev","doi":"arxiv-2408.10910","DOIUrl":"https://doi.org/arxiv-2408.10910","url":null,"abstract":"The sensitivity of underground experiments searching for rare events such as\u0000dark matter, neutrino interactions or several beyond the standard model\u0000phenomena is often limited by the background caused by neutrons from\u0000spontaneous fission and ($alpha,n$) reactions. A number of codes exist to\u0000calculate neutron yields and energy spectra due to these processes. In this\u0000paper we present new calculations of neutron production using the modified\u0000SOURCES4A code with recently updated cross-sections for ($alpha,n$) reactions\u0000and the comparison of the results with available experimental data. The\u0000cross-sections for ($alpha,n$) reactions in SOURCES4 have been taken from\u0000reliable experimental data where possible, complemented by the calculations\u0000with EMPIRE 2.19/3.2.3, TALYS 1.96 or evaluated data library JENDL-5 where the\u0000data were scarce or unavailable.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Naohiko Otuka, Kenichi Tada, Oscar Cabellos, Osamu Iwamoto
{"title":"Evaluation of uranium-233 neutron capture cross section in keV region","authors":"Naohiko Otuka, Kenichi Tada, Oscar Cabellos, Osamu Iwamoto","doi":"arxiv-2408.10098","DOIUrl":"https://doi.org/arxiv-2408.10098","url":null,"abstract":"The uranium-233 neutron capture cross section between 3 keV and 1 MeV was\u0000evaluated with the new alpha value recently measured at the Los Alamos National\u0000Laboratory LANCE facility and compiled in the EXFOR library. The obtained\u0000capture cross section is systematically lower than those in the latest versions\u0000of the major general purpose nuclear data libraries, and the reduction from the\u0000JENDL-5 library is close to 50% around 20 keV. The newly evaluated cross\u0000section was benchmarked against 166 criticality experiments chosen from the\u0000ICSBEP handbook by performing Monte Carlo neutron transport calculation with\u0000the JENDL-5 library, and slight reduction of the cumulative chi-square value\u0000was achieved by adoption of the newly evaluated capture cross section.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Search for the jet-induced diffusion wake in the quark-gluon plasma via measurements of jet-track correlations in photon-jet events in Pb+Pb collisions at $sqrt{mathrm{s}_{mathrm{NN}}}$ = 5.02 TeV with the ATLAS detector","authors":"ATLAS Collaboration","doi":"arxiv-2408.08599","DOIUrl":"https://doi.org/arxiv-2408.08599","url":null,"abstract":"This paper presents a measurement of jet-track correlations in photon-jet\u0000events, using 1.72 nb$^{-1}$ of Pb+Pb data at $sqrt{s_{text{NN}}}$ = 5.02 TeV\u0000recorded with the ATLAS detector at the LHC. Events with energetic photon-jet\u0000pairs are selected, where the photon and jet are approximately back-to-back in\u0000azimuth. The angular correlation between jets and charged-particle tracks with\u0000transverse momentum ($p_text{T}$) in the range 0.5-2.0 GeV in the hemisphere\u0000opposite to the jet, $|Deltaphitext{(jet,track)}|>pi/2$, is measured as a\u0000function of their relative pseudorapidity difference,\u0000$|Deltaetatext{(jet,track)}|$. In central Pb+Pb collisions, these\u0000correlations are predicted to be sensitive to the diffusion wake in the\u0000quark-gluon plasma resulting from the lost energy of high-$p_text{T}$ partons\u0000traversing the plasma, with a characteristic modification as a function of\u0000$|Deltaetatext{(jet,track)}|$. The correlations are examined with different\u0000selections on the jet-to-photon $p_text{T}$ ratio to select events with\u0000different degrees of energy loss. No diffusion wake signal is observed within\u0000the current sensitivity and upper limits at 95% confidence level on the\u0000diffusion wake amplitude are reported.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Dubey, K. Czerski, Gokul Das H, A. Kowalska, N. Targosz-Sleczka, M. Kaczmarski, M. Valat
{"title":"Experimental signatures of a new channel of the DD reaction at very-low energy","authors":"R. Dubey, K. Czerski, Gokul Das H, A. Kowalska, N. Targosz-Sleczka, M. Kaczmarski, M. Valat","doi":"arxiv-2408.07567","DOIUrl":"https://doi.org/arxiv-2408.07567","url":null,"abstract":"The discovery of a new, strong reaction channel of the deuteron-deuteron\u0000fusion at very low energies might have major consequences for the construction\u0000of a future clean and efficient energy source. Following the first theoretical\u0000and experimental indications for the existence of the deuteron-deuteron\u0000threshold resonance in the $^4$He nucleus and its dominant decay by the\u0000internal $e^+e^-$ pair creation, we present here an extensive experimental\u0000study confirming emission of high-energy electrons and positrons. A\u0000simultaneous use of Si charged particle detectors of different thicknesses and\u0000large volume NaI(Tl) and HPGe detectors has allowed for the first time to\u0000determine the branching ratio between emitted protons, neutrons and $e^+e^-$\u0000pairs for deuteron energies down to 5 keV. The high-energy positrons could be\u0000unambiguously detected by their bremsstrahlung spectra and annihilation\u0000radiation, supported by the Monte Carlo Geant4 simulations. The theoretical\u0000calculations, based on a destructive interference between the threshold\u0000resonance and the known broad resonance in $^4$He, agree very well with\u0000experimentally observed increase of branching ratios for lowering projectile\u0000energies. The partial width of the threshold resonance for the $e^+e^-$ pair\u0000creation should be at least 10 times larger than that of the proton channel.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Testing for coherence and nonstandard neutrino interactions in COHERENT data","authors":"Jiajun Liao, Danny Marfatia, Jiajie Zhang","doi":"arxiv-2408.06255","DOIUrl":"https://doi.org/arxiv-2408.06255","url":null,"abstract":"We analyze data from the CsI, liquid Ar and Ge detectors of the COHERENT\u0000experiment and confirm within $1.5sigma$ that the measured elastic\u0000neutrino-nucleus scattering cross section is proportional to the square of the\u0000number of neutrons in the nucleus, as expected for coherent scattering in the\u0000standard model. We also show how various degeneracies involving nonstandard\u0000neutrino interaction parameters are broken in a combined analysis of the three\u0000datasets.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Isaac Kelly, Will Flanagan, Jacob Moldenhauer, William Charlton, Joseph Lapka, Donald Nolting
{"title":"Measurement of the Isomeric Yield Ratio of Zirconium-89m from Zirconium-88 Thermal Neutron Absorption","authors":"Isaac Kelly, Will Flanagan, Jacob Moldenhauer, William Charlton, Joseph Lapka, Donald Nolting","doi":"arxiv-2408.05367","DOIUrl":"https://doi.org/arxiv-2408.05367","url":null,"abstract":"In light of the recently observed 800,000 barn thermal neutron absorption\u0000cross section of zirconium-88, this work investigates the fraction (isomeric\u0000yield ratio) of metastable versus ground state production of zirconium-89 and\u0000implications for ongoing measurements around zirconium-88 neutron absorption.\u0000The metastable state of zirconium-89 resides at 588 keV above the ground state\u0000with a half life of 4.2 minutes. A 5 $mu$Ci zirconium-88 sample was irradiated\u0000for 10 minutes in the core of a TRIGA Mark II nuclear research reactor and\u0000measured with a high purity germanium detector 3 minutes after irradiation. The\u0000isomeric yield ratio was measured to be 74.9$pm$0.6%.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. M. Gesuè, G. F. Ciani, D. Piatti, A. Boeltzig, D. Rapagnani, M. Aliotta, C. Ananna, L. Barbieri, F. Barile, D. Bemmerer, A. Best, C. Broggini, C. G. Bruno, A. Caciolli, M. Campostrini, F. Casaburo, F. Cavanna, P. Colombetti, A. Compagnucci, P. Corvisiero, L. Csedreki, T. Davinson, G. M. De Gregorio, D. Dell'Aquila, R. Depalo, A. Di Leva, Z. Elekes, F. Ferraro, A. Formicola, Zs. Fülöp, G. Gervino, A. Guglielmetti, C. Gustavino, Gy. Gyürky, G. Imbriani, M. Junker, M. Lugaro, P. Marigo, J. Marsh, E. Masha, R. Menegazzo, D. Mercogliano, V. Paticchio, R. Perrino, P. Prati, V. Rigato, D. Robb, L. Schiavulli, R. S. Sidhu, J. Skowronski, O. Straniero, T. Szücs, S. Zavatarelli
{"title":"First direct measurement of the 64.5 keV resonance strength in $^{17}$O(p,$γ$)$^{18}$F reaction","authors":"R. M. Gesuè, G. F. Ciani, D. Piatti, A. Boeltzig, D. Rapagnani, M. Aliotta, C. Ananna, L. Barbieri, F. Barile, D. Bemmerer, A. Best, C. Broggini, C. G. Bruno, A. Caciolli, M. Campostrini, F. Casaburo, F. Cavanna, P. Colombetti, A. Compagnucci, P. Corvisiero, L. Csedreki, T. Davinson, G. M. De Gregorio, D. Dell'Aquila, R. Depalo, A. Di Leva, Z. Elekes, F. Ferraro, A. Formicola, Zs. Fülöp, G. Gervino, A. Guglielmetti, C. Gustavino, Gy. Gyürky, G. Imbriani, M. Junker, M. Lugaro, P. Marigo, J. Marsh, E. Masha, R. Menegazzo, D. Mercogliano, V. Paticchio, R. Perrino, P. Prati, V. Rigato, D. Robb, L. Schiavulli, R. S. Sidhu, J. Skowronski, O. Straniero, T. Szücs, S. Zavatarelli","doi":"arxiv-2408.03015","DOIUrl":"https://doi.org/arxiv-2408.03015","url":null,"abstract":"The CNO cycle is one of the most important nuclear energy sources in stars.\u0000At temperatures of hydrostatic H-burning (20 MK $<$ T $<$ 80 MK) the\u0000$^{17}$O(p,$gamma$)$^{18}$F reaction rate is dominated by the poorly\u0000constrained 64.5~keV resonance. Here we report on the first direct measurements\u0000of its resonance strength and of the direct capture contribution at 142 keV,\u0000performed with a new high sensitivity setup at LUNA. The present resonance\u0000strength of $omegagamma_{(p, gamma)}$textsuperscript{bare} = (30 $pm$\u00006textsubscript{stat} $pm$ 2textsubscript{syst})~peV is about a factor of 2\u0000higher than the values in literature, leading to a\u0000$Gamma$textsubscript{p}textsuperscript{bare} = (34 $pm$\u00007textsubscript{stat} $pm$ 3textsubscript{syst})~neV, in agreement with LUNA\u0000result from the (p,$alpha$) channel. Such agreement strengthen our\u0000understanding of the oxygen isotopic ratios measured in red giant stars and in\u0000O-rich presolar grains.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141946139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L. Baudis, R. Biondi, A. Bismark, A. Clozza, C. Curceanu, M. Galloway, F. Napolitano, F. Piastra, K. Piscicchia, A. Porcelli, D. Ramírez García
{"title":"Search for Pauli Exclusion Principle Violations with Gator at LNGS","authors":"L. Baudis, R. Biondi, A. Bismark, A. Clozza, C. Curceanu, M. Galloway, F. Napolitano, F. Piastra, K. Piscicchia, A. Porcelli, D. Ramírez García","doi":"arxiv-2408.02500","DOIUrl":"https://doi.org/arxiv-2408.02500","url":null,"abstract":"The Pauli Exclusion Principle (PEP) appears from fundamental symmetries in\u0000quantum field theories, but its physical origin is still to be understood.\u0000High-precision experimental searches for small PEP violations permit testing\u0000key assumptions of the Standard Model with high sensitivity. We report on a\u0000dedicated measurement with Gator, a low-background, high-purity germanium\u0000detector operated at the Laboratori Nazionali del Gran Sasso, aimed at testing\u0000PEP-violating atomic transitions in lead. The experimental technique, relying\u0000on forming a new symmetry state by introducing electrons into the pre-existing\u0000electron system through a direct current, satisfies the conditions of the\u0000Messiah-Greenberg superselection rule. No PEP violation has been observed, and\u0000an upper limit on the PEP violation probability of $beta^2/2 < 4.8 cdot\u000010^{-29}$ (90% CL) is set. This improves the previous constraint from a\u0000comparable measurement by more than one order of magnitude.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141946140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Khuyagbaatar, R. A. Cantemir, Ch. E. Duellmann, E. Jaeger, B. Kindler, J. Krier, N. Kurz, B. Lommel, B. Schausten, A. Yakushev
{"title":"On the decay properties of the neutron-deficient isotope 242Es","authors":"J. Khuyagbaatar, R. A. Cantemir, Ch. E. Duellmann, E. Jaeger, B. Kindler, J. Krier, N. Kurz, B. Lommel, B. Schausten, A. Yakushev","doi":"arxiv-2408.01714","DOIUrl":"https://doi.org/arxiv-2408.01714","url":null,"abstract":"The radioactive decay properties of $^{242}$Es were studied with\u0000significantly improved statistics compared to available literature data. This\u0000isotope was produced in the 3n evaporation channel of the fusion reaction of\u0000$^{48}$Ca+$^{197}$Au. A half-life of 16.9(8)~s was deduced from 662 $alpha$\u0000decays of $^{242}$Es, resulting in an $alpha$-decay branching of 41(3)%.\u0000Twenty-six fission events with a half-life of 18.2$^{+4.5}_{-3.0}$~s were\u0000assigned to originate from the electron-capture delayed fission of $^{242}$Es.\u0000The probability for the electron-capture delayed fission was measured to be\u00000.015(4), which improves and resolves ambiguities in available experimental\u0000data. We discuss all known cases for electron-capture delayed fission in Es,\u0000Bk, and Am isotopes and compare experimental data with predictions from a\u0000recent semi-empirical model. A cross section of 27(3)~nb was measured for the\u0000production of $^{242}$Es.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141946141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Restricting Sterile Neutrinos by Neutrinoless Double Beta Decay","authors":"Sudip Jana, Lucas Puetter, Alexei Yu. Smirnov","doi":"arxiv-2408.01488","DOIUrl":"https://doi.org/arxiv-2408.01488","url":null,"abstract":"The bounds on parameters of the eV and higher scale sterile neutrinos from\u0000the $0nu beta beta$ decay have been refined and updated. We present a simple\u0000and compact analytic expression for the bound in the $Delta m^2_{41} - sin^2\u00002theta_{14}$ plane, which includes all relevant parameters. Dependencies of\u0000the bound on unknown CP-phases and the type of mass spectrum of light neutrinos\u0000(mass ordering and level of degeneracy) are studied in detail. We have computed\u0000the bounds using the latest and most stringent data from KamLAND-Zen. The\u0000projected constraints from future experiments are estimated. The obtained\u0000bounds are confronted with positive indications of the presence of sterile\u0000neutrinos as well as with the other existing bounds. The $0nu beta beta$\u0000decay results exclude the regions of parameters implied by BEST and Neutrino-4,\u0000and the regions indicated by LSND and MiniBooNE are in conflict with $0nu\u0000beta beta$ results combined with $nu_mu-$ disappearance bounds.","PeriodicalId":501206,"journal":{"name":"arXiv - PHYS - Nuclear Experiment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141946142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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