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1.
New results on the $^8$Be anomaly / Krasznahorkay, A J (Debrecen, Inst. Nucl. Res.) ; Csatlós, M (Debrecen, Inst. Nucl. Res.) ; Csige, L (Debrecen, Inst. Nucl. Res.) ; Gácsi, Z (Debrecen, Inst. Nucl. Res.) ; Gulyás, J (Debrecen, Inst. Nucl. Res.) ; Nagy, Á (Debrecen, Inst. Nucl. Res.) ; Sas, N (Debrecen, Inst. Nucl. Res.) ; Timár, J (Debrecen, Inst. Nucl. Res.) ; Tornyi, T G (Debrecen, Inst. Nucl. Res.) ; Vajda, I (Debrecen, Inst. Nucl. Res.) et al.
Recently, we observed anomalous internal pair creation for the M1 transition depopulating the 18.15 MeV isoscalar 1$^+$ state in $^8$Be. We observed a significant (σ = 7.37) peak-like deviation from the predicted angular correlation of the e+ e pairs at θ = 140°. [...]
2018 - 7 p. - Published in : J. Phys.: Conf. Ser. 1056 (2018) 012028 Fulltext: pdf - PDF; 10.1088_1742-6596_1056_1_012028 - PDF;
In : Conference on Neutrino and Nuclear Physics, Catania, Italy, 15 - 21 Oct 2017
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2.
Observation of Anomalous Internal Pair Creation in $^8$Be / Krasznahorkay, A J (KLTE-ATOMKI) ; Csatlós, M (KLTE-ATOMKI) ; Csige, L (KLTE-ATOMKI) ; Gácsi, Z (KLTE-ATOMKI) ; Gulyás, J (KLTE-ATOMKI) ; Hunyadi, M (KLTE-ATOMKI) ; Ketel, T J (NIKHEF, Amsterdam) ; Krasznahorkay, A (KLTE-ATOMKI ; CERN) ; Kuti, I (KLTE-ATOMKI) ; Nyakó, B M (KLTE-ATOMKI) et al.
The electron–positron angular correlation was measured for the isoscalar magnetic dipole 18.15 MeV transition in 8Be. Significant, peak-like deviation was observed from the internal pair creation at Θ ≈ 140° in the angular correlation. [...]
2015 - 8 p. - Published in : Acta Phys. Pol. Suppl. 8 (2015) 597 Acta Physica Polonica: PDF;
In : 22nd Nuclear Physics Workshop 'Marie & Pierre Curie': Essential Problems in Nuclear Physics, Kazimierz Dolny, Poland, 22 - 27 Sep 2015, pp.597
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3.
Observation of Anomalous Internal Pair Creation in $^8$Be: A Possible Signature of a Light, Neutral Boson / Krasznahorkay, A. J. (Debrecen, Inst. Nucl. Res.) ; Csatlós, M. (KLTE-ATOMKI) ; Csige, L. (KLTE-ATOMKI) ; Gácsi, Z. (KLTE-ATOMKI) ; Gulyás, J. (KLTE-ATOMKI) ; Hunyadi, M. (KLTE-ATOMKI) ; Ketel, T.J. (NIKHEF, Amsterdam) ; Krasznahorkay, A. (KLTE-ATOMKI ; CERN) ; Kuti, I. (KLTE-ATOMKI) ; Nyakó, B.M. (KLTE-ATOMKI) et al.
Electron-positron angular correlations were measured for the isovector magnetic dipole 17.6 MeV state ($J^\pi=1^+$, $T=1$) $\rightarrow$ ground state ($J^\pi=0^+$, $T=0$) and the isoscalar magnetic dipole 18.15 MeV ($J^\pi=1^+$, $T=0$) state $\rightarrow$ ground state transitions in $^{8}$Be. Significant deviation from the internal pair creation was observed at large angles in the angular correlation for the isoscalar transition with a confidence level of $> 5\sigma$. [...]
arXiv:1504.01527.- 2016-01-26 - 5 p. - Published in : Phys. Rev. Lett. 116 (2016) 042501 APS Open Access article: PDF; Fulltext: PDF; External link: Symmetry Magazine article
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4.
A pair spectrometer for measuring multipolarities of energetic nuclear transitions / Gulyás, J. (Debrecen, Inst. Nucl. Res.) ; Ketel, T.J. (NIKHEF, Amsterdam) ; Krasznahorkay, A.J. (Debrecen, Inst. Nucl. Res.) ; Csatlós, M. (Debrecen, Inst. Nucl. Res.) ; Csige, L. (Debrecen, Inst. Nucl. Res.) ; Gácsi, Z. (Debrecen, Inst. Nucl. Res.) ; Hunyadi, M. (Debrecen, Inst. Nucl. Res.) ; Krasznahorkay, A. (CERN) ; Vitéz, A. (Debrecen, Inst. Nucl. Res.) ; Tornyi, T.G. (Debrecen, Inst. Nucl. Res.)
A multi-detector array has been designed and constructed for the simultaneous measurement of energy- and angular correlations of electron-positron pairs. Experimental results are obtained over a wide angular range for high-energy transitions in 16O, 12C and 8Be. [...]
arXiv:1504.00489.- 2016-02-01 - 8 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 808 (2016) 21-28 Fulltext: PDF; External link: Preprint
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5.
Detection of explosives with the PELAN system / Womble, P C ; Campbell, C ; Gacsi, Z ; Hui, S ; Paschal, J ; Vourvopoulos, G
2000
In : 16th International Conference on the Application of Accelerators in Research and Industry, Denton, TX, USA, 1 - 5 Nov 2000, pp.1069-1072
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6.
Large collectivity of $^{34}$Mg / Iwasaki, H ; Motobayashi, T ; Sakuraï, H ; Yoneda, K ; Gomi, T ; Aoi, N ; Fukuda, N ; Fülöp, Z ; Futakami, U ; Gacsi, Z et al.
CNS-REP-38 ; RIKEN-AF-NP-409. - 2001. - 13 p.
Fulltext - Fulltext
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7.
Large deformation of the neutron-rich isotope $^{34}Mg$ from in-beam $\gamma$-ray spectroscopy using RI beam fragmentation / Yoneda, K ; Sakuraï, H ; Gomi, T ; Motobayashi, T ; Aoi, N ; Fukuda, N ; Futakami, U ; Gacsi, Z ; Higurashi, Y ; Imai, N et al.
RIKEN-AF-NP-365. - 2000. - 12 p.
Access to fulltext document - Access to fulltext document
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8.
International Symposium on Exotic Nuclear Shapes v.1 International Symposium on Exotic Nuclear Shapes - ENS '97   12 - 17 May 1997  - Debrecen, Hungary  / Dombrádi, Z (ed.); Gacsi, Z (ed.); Krasznahorkay, A (ed.)
1997 - Published in : Heavy Ion Phys. 6 (1997)
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