References quoted in the XUNDL dataset: 12C 11B(P,X):XUNDL-65
2 references found.
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Phys.Rev. C 104, 044003 (2021)
A.J.Krasznahorkay, M.Csatlos, L.Csige, J.Gulyas, A.Krasznahorkay, B.M.Nyako, I.Rajta, J.Timar, I.Vajda, N.J.Sas
New anomaly observed in 4He supports the existence of the hypothetical X17 particle
NUCLEAR REACTIONS 3H(p, e+e-)4He, E=510, 610, 900 keV; measured electron and positrons, energy-sum spectra and angular correlation of e+e- pairs using scintillation detectors and double-sided silicon strip detectors (DSSD) at the 2-MV Tandetron accelerator of ATOMKI, Debrecen; deduced anomalous excess of e+e- pairs around 115°, interpreted as creation and subsequent decay of a light particle during the direct capture process; extracted internal pair creation coefficient (IPCC), X17 boson branching ratio, mass of X17 particle with confidence level; likely the same as X17 particle suggested by 2016Kr01 (Phys. Rev. Lett. 116, 042501). 7Li(p, e+e-)8Be, E=441 keV; measured angular correlation of e+e- pairs for the 17.6-MeV, M1 transition in 8Be as a test of the experimental apparatus and methodology.
doi: 10.1103/PhysRevC.104.044003
Phys.Rev. C 106, L061601 (2022)
A.J.Krasznahorkay, A.Krasznahorkay, M.Begala, M.Csatlos, L.Csige, J.Gulyas, A.Krako, J.Timar, I.Rajta, I.Vajda, N.J.Sas
New anomaly observed in 12C supports the existence and the vector character of the hypothetical X17 boson
NUCLEAR REACTIONS 11B(p, e+e-), E=1.5-2.5 MeV; measured electron and positrons, energy-sum spectra and angular correlation; deduced anomalous excess of e+e- pairs around 155-160null from the decay of 17.2 MeV J=1- state in 12C via E1 transition. Extracted X17 boson branching ratio, mass of X17 particle; likely the same as X17 particle suggested by 2016Kr01 (Phys. Rev. Lett. 116, 042501). Scintillation detectors and double-sided silicon strip detectors (DSSD) at 2 MV Tandetron accelerator of ATOMKI (Debrecen, Hungary).
doi: 10.1103/PhysRevC.106.L061601