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1. Addendum: The observation of vibrating pear-shapes in radon nuclei

Author

P. A. Butler, L. P. Gaffney, P. Spagnoletti, J. Konki, M. Scheck, J. F. Smith, K. Abrahams, M. Bowry, J. Cederkäll, T. Chupp, G. de Angelis, H. De Witte, P. E. Garrett, A. Goldkuhle, C. Henrich, A. Illana, K. Johnston, D. T. Joss, J. M. Keatings, N. A. Kelly, M. Komorowska, T. Kröll, M. Lozano, B. S. Nara Singh, D. O’Donnell, J. Ojala, R. D. Page, L. G. Pedersen, C. Raison, P. Reiter, J. A. Rodriguez, D. Rosiak, S. Rothe, T. M. Shneidman, B. Siebeck, M. Seidlitz, J. Sinclair, M. Stryjczyk, P. Van Duppen, S. Vinals, V. Virtanen, N. Warr, K. Wrzosek-Lipska, and M. Zielinska

Subjects
Science
Published
2020
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2. The observation of vibrating pear-shapes in radon nuclei

Author

P. A. Butler, L. P. Gaffney, P. Spagnoletti, J. Konki, M. Scheck, J. F. Smith, K. Abrahams, M. Bowry, J. Cederkäll, T. Chupp, G. de Angelis, H. De Witte, P. E. Garrett, A. Goldkuhle, C. Henrich, A. Illana, K. Johnston, D. T. Joss, J. M. Keatings, N. A. Kelly, M. Komorowska, T. Kröll, M. Lozano, B. S. Nara Singh, D. O’Donnell, J. Ojala, R. D. Page, L. G. Pedersen, C. Raison, P. Reiter, J. A. Rodriguez, D. Rosiak, S. Rothe, T. M. Shneidman, B. Siebeck, M. Seidlitz, J. Sinclair, M. Stryjczyk, P. Van Duppen, S. Vinals, V. Virtanen, N. Warr, K. Wrzosek-Lipska, and M. Zielinska

Subjects
Science
Abstract

Octupole deformation in nuclei is important to understand nuclear structure and electric dipole moments of heavy atoms. Here the authors measure energies of excited quantum states in radon isotopes and find that these isotopes do not provide favourable conditions in the search for CP-violation.

Published
2019
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4. Pairing-quadrupole interplay in the neutron-deficient tin nuclei: First lifetime measurements of low-lying states in 106,108Sn

Author

M. Siciliano, J.J. Valiente-Dobón, A. Goasduff, F. Nowacki, A.P. Zuker, D. Bazzacco, A. Lopez-Martens, E. Clément, G. Benzoni, T. Braunroth, F.C.L. Crespi, N. Cieplicka-Oryńczak, M. Doncel, S. Ertürk, G. de France, C. Fransen, A. Gadea, G. Georgiev, A. Goldkuhle, U. Jakobsson, G. Jaworski, P.R. John, I. Kuti, A. Lemasson, T. Marchi, D. Mengoni, C. Michelagnoli, T. Mijatović, C. Müller-Gatermann, D.R. Napoli, J. Nyberg, M. Palacz, R.M. Pérez-Vidal, B. Sayği, D. Sohler, S. Szilner, D. Testov, M. Zielińska, D. Barrientos, B. Birkenbach, H.C. Boston, A.J. Boston, B. Cederwall, J. Collado, D.M. Cullen, P. Désesquelles, C. Domingo-Pardo, J. Dudouet, J. Eberth, F.J. Egea-Canet, V. González, L.J. Harkness-Brennan, H. Hess, D.S. Judson, A. Jungclaus, W. Korten, M. Labiche, A. Lefevre, S. Leoni, H. Li, A. Maj, R. Menegazzo, B. Million, A. Pullia, F. Recchia, P. Reiter, M.D. Salsac, E. Sanchis, O. Stezowski, and Ch. Theisen

Subjects
Lifetime, Nuclear structure, Multi-nucleon transfer, Light Sn, Tracking array, Physics, QC1-999
Abstract

The lifetimes of the low-lying excited states 2+ and 4+ have been directly measured in the neutron-deficient 106,108Sn isotopes. The nuclei were populated via a deep-inelastic reaction and the lifetime measurement was performed employing a differential plunger device. The emitted γ rays were detected by the AGATA array, while the reaction products were uniquely identified by the VAMOS++ magnetic spectrometer. Large-Scale Shell-Model calculations with realistic forces indicate that, independently of the pairing content of the interaction, the quadrupole force is dominant in the B(E2;21+→0g.s.+) values and it describes well the experimental pattern for 104−114Sn; the B(E2;41+→21+) values, measured here for the first time, depend critically on a delicate pairing-quadrupole balance, disclosed by the very precise results in 108Sn.

Published
2020
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6. Publisher Correction: The observation of vibrating pear-shapes in radon nuclei

Author

P. A. Butler, L. P. Gaffney, P. Spagnoletti, J. Konki, M. Scheck, J. F. Smith, K. Abrahams, M. Bowry, J. Cederkäll, T. Chupp, G. de Angelis, H. De Witte, P. E. Garrett, A. Goldkuhle, C. Henrich, A. Illana, K. Johnston, D. T. Joss, J. M. Keatings, N. A. Kelly, M. Komorowska, T. Kröll, M. Lozano, B. S. Nara Singh, D. O’Donnell, J. Ojala, R. D. Page, L. G. Pedersen, C. Raison, P. Reiter, J. A. Rodriguez, D. Rosiak, S. Rothe, T. M. Shneidman, B. Siebeck, M. Seidlitz, J. Sinclair, M. Stryjczyk, P. Van Duppen, S. Vinals, V. Virtanen, N. Warr, K. Wrzosek-Lipska, and M. Zielinska

Subjects
Science
Abstract

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Published
2020
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7. Complete set of bound negative-parity states in the neutron-rich 18N nucleus

Author

Ziliani, S., Ciemała, M., Crespi, F. C. L., Leoni, S., Fornal, B., Suzuki, T., Otsuka, T., Maj, A., Bednarczyk, P., Benzoni, G., Bracco, A., Boiano, C., Bottoni, S., Brambilla, S., Bast, M., Beckers, M., Braunroth, T., Camera, F., Cieplicka-Orynczak, N., Clément, E., Coelli, S., Dorvaux, O., Erturk, S., De France, G., Fransen, C., Goldkuhle, A., Grebosz, J., Harakeh, M. N., Iskra, Ł. W., Jacquot, B., Karpov, A., Kicinska-Habior, M., Kimi, Y. -H., Kmiecik, M., Lemasson, A., Lewitowicz, M., Lenzi, S., Li, H., Matea, I., Mazurek, K., Michelagnoli, C., Matejska-Minda, M., Million, B., Müller-Gatermann, C., Nanal, V., Napiorkowski, P., Napoli, D. R., Palit, R., Rejmund, M., Schmitt, Ch., Stanoiu, M., Stefan, I., Vardaci, E., Wasilewska, B., Wieland, O., Zieblinski, M., and Zielinska, M.

Subjects
Nuclear Experiment
Abstract

High-resolution gamma-ray spectroscopy of 18N is performed with the Advanced GAmma Tracking Array AGATA, following deep-inelastic processes induced by an 18O beam on a 181Ta target. Six states are newly identified, which together with the three known excitations exhaust all negative-parity excited states expected in 18N below the neutron threshold. Spin and parities are proposed for all located states on the basis of decay branchings and comparison with large-scale shell-model calculations performed in the p-sd space, with the YSOX interaction. Of particular interest is the location of the 0^-_1 and 1^-_2 excitations, which provide strong constrains for cross-shell p-sd matrix elements based on realistic interactions, and help to simultaneously reproduce the ground and first-excited states in 16N and 18N, for the first time. Understanding the 18N structure may also have significant impact on neutron-capture cross-section calculations in r-process modeling including light neutron-rich nuclei.

Published
2021
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8. Lifetime Measurements in the Even-Even $^{102-108}$Cd Isotopes

Author

Siciliano, M., Valiente-Dobón, J. J., Goasduff, A., Rodríguez, T. R., Bazzacco, D., Benzoni, G., Braunroth, T., Cieplicka-Oryńczak, N., Clément, E., Crespi, F. C. L., de France, G., Doncel, M., Ertürk, S., Fransen, C., Gadea, A., Georgiev, G., Goldkuhle, A., Jakobsson, U., Jaworski, G., John, P. R., Kuti, I., Lemasson, A., Li, H., Lopez-Martens, A., Marchi, T., Mengoni, D., Michelagnoli, C., Mijatović, T., Müller-Gatermann, C., Napoli, D. R., Nyberg, J., Palacz, M., Pérez-Vidal, R. M., Sayği, B., Sohler, D., Szilner, S., and Testov, D.

Subjects
Nuclear Experiment
Abstract

The heaviest N=Z doubly-magic nucleus, $^{100}$Sn, and the neighboring nuclei offer unique opportunities to investigate the properties of nuclear interaction in extreme conditions. In particular, the Cd isotopes are expected to present features similar to those found in the Sn isotopic chain, since they have only two proton holes in the Z=50 shell. In this manuscript, the lifetime measurements of low-lying states in the even-mass $^{102-108}$Cd is presented. Thanks to the powerful detection capabilities of AGATA array and VAMOS++ spectrometer, the unusual employment of multi-nucleon transfer reactions permitted to investigate the first 2$^+$ and 4$^+$ states in all these nuclei, together with various deformed bands in $^{106}$Cd. The results were interpreted in the context of new state-of-the-art beyond-mean-field calculations, using the symmetry-conserving configuration-mixing approach. Despite the similarities in the electromagnetic properties of the low-lying states, there is a fundamental structural difference between the ground-state bands in the Z=48 and Z=50 isotopes. The comparison between experimental and theoretical results revealed a rotational character of the Cd nuclei, which have prolate-deformed ground states with $\beta_2 \approx 0.2$. At this deformation Z=48 becomes a closed-shell configuration, which is favored with respect to the spherical one., Comment: V1 : 14 pages, 12 figures. V2 : 16 pages, 11 figures. V3 : 16 pages, 11 figures (figure 11 corrected); triaxiality evaluated with "quadrupole sum rule". submitted to Phys.Rev.C

Published
2021
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9. Accessing tens-to-hundreds femtoseconds nuclear state lifetimes with low-energy binary heavy-ion reactions

Author

Ciemala, M., Ziliani, S., Crespi, F. C. L., Leoni, S., Fornal, B., Maj, A., Bednarczyk, P., Benzoni, G., Bracco, A., Boiano, C., Bottoni, S., Brambilla, S., Bast, M., Beckers, M., Braunroth, T., Camera, F., Cieplicka-Orynczak, N., Clement, E., Coelli, S., Dorvaux, O., Erturk, S., De France, G., Fransen, C., Goldkuhle, A., Grebosz, J., Harakeh, M. N., Iskra, L. W., Jacquot, B., Karpov, A., Kicinska-Habior, M., Kim, Y. -H., Kmiecik, M., Lemasson, A., Lenzi, S. M., Lewitowicz, M., Li, H., Matea, I., Mazurek, K., Michelagnoli, C., Matejska-Minda, M., Million, B., Muller-Gatermann, C., Nanal, V., Napiorkowski, P., Napoli, D. R., Palit, R., Rejmund, M., Schmitt, Ch., Stanoiu, M., Stefan, I., Vardaci, E., Wasilewska, B., Wieland, O., Zieblinski, M., and Zielinska, M.

Subjects
Nuclear Experiment
Abstract

A novel Monte Carlo technique has been developed to determine lifetimes of excited states in the tens-to-hundreds femtoseconds range. The method is applied to low-energy heavy-ion binary reactions populating nuclei with complex velocity distributions. Its relevance is demonstrated in connection with the $^{18}$O(7.0 MeV/u) + $^{181}$Ta experiment, performed at GANIL with the AGATA+VAMOS+PARIS setup, to study neutron-rich O, C, N, ... nuclei. Excited states in $^{17}$O and $^{19}$O, with known lifetimes, are used to validate the method over the $\sim$20-400 fs lifetime-sensitivity range. Emphasis is given to the unprecedented position resolution provided by $\gamma$-tracking arrays, which turns out to be essential for reaching the required accuracy in Doppler-shift correction, at the basis of the detailed analysis of $\gamma$-ray lineshape and resulting state lifetime determination. The technique is anticipated to be an important tool for lifetime investigations in exotic neutron-rich nuclei, produced with intense ISOL-type beams.

Published
2020
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10. The observation of vibrating pear shapes in radon nuclei: update

Author

Butler, P. A., Gaffney, L. P., Spagnoletti, P., Konki, J., Scheck, M., Smith, J. F., Abrahams, K., Bowry, M., Cederkäll, J., Chupp, T., De Angelis, G., De Witte, H., Garrett, P. E., Goldkuhle, A., Henrich, C., Illana, A., Johnston, K., Joss, D. T., Keatings, J. M., Kelly, N. A., Komorowska, M., Kröll, T., Lozano, M., Singh, B. S. Nara, O'Donnell, D., Ojala, J., Page, R. D., Pedersen, L. G., Raison, C., Reiter, P., Rodriguez, J. A., Rosiak, D., Rothe, S., Seidlitz, M., Shneidman, T. M., Siebeck, B., Sinclair, J., Stryjczyk, M., Van Duppen, P., Vinals, S., Virtanen, V., Warr, N., Wrzosek-Lipska, K., and Zielińska, M.

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

There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the standard model of particle physics. Isotopes of both radon and radium have been identified as candidates for such measurements. Here, we have observed the low-lying quantum states in $^{224}$Rn and $^{226}$Rn by accelerating beams of these radioactive nuclei. We report here additional states not assigned in our 2019 publication. We show that radon isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment., Comment: Updated from Nat. Comm. 10 (2019) 2473

Published
2020
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11. Testing ab initio nuclear structure in neutron-rich nuclei: lifetime measurements of second 2+ states in 16C and 20O

Author

Ciemala, M., Ziliani, S., Crespi, F. C. L., Leoni, S., Fornal, B., Maj, A., Bednarczyk, P., Benzoni, G., Bracco, A., Boiano, C., Bottoni, S., Brambilla, S., Bast, M., Beckers, M., Braunroth, T., Camera, F., Cieplicka-Orynczak, N., Clement, E., Coelli, S., Dorvaux, O., Erturk, S., de France, G., Fransen, C., Goldkuhle, A., Grebosz, J., Harakeh, M. N., Iskra, L. W., Jacquot, B., Karpov, A., Kicinska-Habior, M., Kim, Y., Kmiecik, M., Lemasson, A., Lenzi, S. M., Lewitowicz, M., Li, H., Matea, I., Mazurek, K., Michelagnoli, C., Matejska-Minda, M., Million, B., Muller-Gatermann, C., Nanal, V., Napiorkowski, P., Napoli, D. R., Palit, R., Rejmund, M., Schmitt, Ch., Stanoiu, M., Stefan, I., Vardaci, E., Wasilewska, B., Wieland, O., Zieblinski, M., Zielinska, M., Atac, A., Barrientos, D., Birkenbach, B., Boston, A. J., Cederwall, B., Charles, L., Collado, J., Cullen, D. M., Desesquelles, P., Domingo-Pardo, C., Dudouet, J., Eberth, J., Gonzalez, V., Goupil, J., Harkness-Brennan, L. J., Hess, H., Judson, D. S., Jungclaus, A., Korten, W., Labiche, M., Lefevre, A., Menegazzo, R., Mengoni, D., Nyberg, J., Perez-Vidal, R. M., Podolyak, Zs., Pullia, A., Recchia, F., Reiter, P., Saillant, F., Salsac, M. D., Sanchis, E., Stezowski, O., Theisen, Ch., Valiente-Dobon, J. J., Holt, J. D., Menendez, J., Schwenk, A., and Simonis, J.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

To test the predictive power of ab initio nuclear structure theory, the lifetime of the second 2+ state in neutron-rich 20O, tau(2+_2 ) = 150(+80-30) fs, and an estimate for the lifetime of the second 2+ state in 16C have been obtained, for the first time. The results were achieved via a novel Monte Carlo technique that allowed us to measure nuclear state lifetimes in the tens-to-hundreds femtoseconds range, by analyzing the Doppler-shifted gamma-transition line shapes of products of low-energy transfer and deep-inelastic processes in the reaction 18O (7.0 MeV/u) + 181Ta. The requested sensitivity could only be reached owing to the excellent performances of the AGATA gamma-tracking array, coupled to the PARIS scintillator array and to the VAMOS++ magnetic spectrometer. The experimental lifetimes agree with predictions of ab initio calculations using two- and three-nucleon interactions, obtained with the valence-space in-medium similarity renormalization group for 20O, and with the no-core shell model for 16C. The present measurement shows the power of electromagnetic observables, determined with high-precision gamma spectroscopy, to assess the quality of first-principles nuclear structure calculations, complementing common benchmarks based on nuclear energies. The proposed experimental approach will be essential for short lifetimes measurements in unexplored regions of the nuclear chart, including r-process nuclei, when intense ISOL-type beams become available.

Published
2020
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12. Evolution of Octupole Deformation in Radium Nuclei from Coulomb Excitation of Radioactive $^{222}$Ra and $^{228}$Ra Beams

Author

Butler, P. A., Gaffney, L. P., Spagnoletti, P., Abrahams, K., Bowry, M., Cederkäll, J., De Angelis, G., De Witte, H., Garrett, P. E., Goldkuhle, A., Henrich, C., Illana, A., Johnston, K., Joss, D. T., Keatings, J. M., Kelly, N. A., Komorowska, M., Konki, J., Kröll, T., Lozano, M., Singh, B. S. Nara, O'Donnell, D., Ojala, J., Page, R. D., Pedersen, L. G., Raison, C., Reiter, P., Rodriguez, J. A., Rosiak, D., Rothe, S., Scheck, M., Seidlitz, M., Shneidman, T. M., Siebeck, B., Sinclair, J., Smith, J. F., Stryjczyk, M., Van Duppen, P., Vinals, S., Virtanen, V., Warr, N., Wrzosek-Lipska, K., and Zielińska, M.

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

There is sparse direct experimental evidence that atomic nuclei can exhibit stable pear shapes arising from strong octupole correlations. In order to investigate the nature of octupole collectivity in radium isotopes, electric octupole ($E3$) matrix elements have been determined for transitions in $^{222,228}$Ra nuclei using the method of sub-barrier, multi-step Coulomb excitation. Beams of the radioactive radium isotopes were provided by the HIE-ISOLDE facility at CERN. The observed pattern of $E$3 matrix elements for different nuclear transitions is explained by describing $^{222}$Ra as pear-shaped with stable octupole deformation, while $^{228}$Ra behaves like an octupole vibrator., Comment: to be published in Physical Review Letters

Published
2020
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15. Pairing-quadrupole interplay in the neutron-deficient tin nuclei: first lifetime measurements of low-lying states in $^{106,108}$Sn

Author

Siciliano, M., Valiente-Dobón, J. J., Goasduff, A., Nowacki, F., Zuker, A. P., Bazzacco, D., Lopez-Martens, A., Clément, E., Benzoni, G., Braunroth, T., Cieplicka-Oryńczak, N., Crespi, F. C. L., de France, G., Doncel, M., Ertürk, S., Fransen, C., Gadea, A., Georgiev, G., Goldkuhle, A., Jakobsson, U., Jaworski, G., John, P. R., Kuti, I., Lemasson, A., Li, H., Marchi, T., Mengoni, D., Michelagnoli, C., Mijatović, T., Müller-Gatermann, C., Napoli, D. R., Nyberg, J., Palacz, M., Pérez-Vidal, R. M., Sayği, B., Sohler, D., Szilner, S., Testov, D., Barrientos, D., Birkenbach, B., Boston, H. C., Boston, A. J., Cederwall, B., Cullen, D. M., Collado, J., Désesquelles, P., Dudouet, J., Domingo-Pardo, C., Eberth, J., Egea-Canet, F. J., González, V., Judson, D. S., Harkness-Brennan, L. J., Hess, H., Jungclaus, A., Korten, W., Labiche, M., Lefevre, A., Leoni, S., Maj, A., Menegazzo, R., Million, B., Pullia, A., Recchia, F., Reiter, P., Salsac, M. D., Sanchis, E., Stezowski, O., Theisen, Ch., and Zielińska, M.

Subjects
Nuclear Experiment
Abstract

The lifetimes of the low-lying excited states $2^+$ and $4^+$ have been directly measured in the neutron-deficient $^{106,108}$Sn isotopes. The nuclei were populated via a deep-inelastic reaction and the lifetime measurement was performed employing a differential plunger device. The emitted $\gamma$ rays were detected by the AGATA array, while the reaction products were uniquely identified by the VAMOS++ magnetic spectrometer. Large-Scale Shell-Model calculations with realistic forces indicate that, independently of the pairing content of the interaction, the quadrupole force is dominant in the $B(E2; 2_1^+ \to 0_{g.s.}^+)$ values and it describes well the experimental pattern for $^{104-114}$Sn; the $B(E2; 4_1^+ \to 2_1^+)$ values, measured here for the first time, depend critically on a delicate pairing-quadrupole balance, disclosed by the very precise results in $^{108}$Sn. This result provides insight in the hitherto unexplained $B(E2; 4_1^+ \to 2_1^+)/B(E2; 2_1^+ \to 0_{g.s.}^+) < 1$ anomaly., Comment: V1: 6 pages, 3 figures, 1 table, theoretical interpretation described in detail in the arXiv paper of A.P.Zuker (cross-reference) V2: added reference to A.P. Zuker paper (arXiv:1905.11479)

Published
2019
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22. A new dedicated plunger device for the GALILEO [formula omitted]-ray detector array

Author

Müller-Gatermann, C., von Spee, F., Goasduff, A., Bazzacco, D., Beckers, M., Braunroth, T., Boso, A., Cocconi, P., de Angelis, G., Dewald, A., Fransen, C., Goldkuhle, A., Gottardo, A., Gozzelino, A., Hadyńska-Klęk, K., Jawroski, G., John, P.R., Jolie, J., Lenzi, S.M., Litzinger, J., Menegazzo, R., Mengoni, D., Napoli, D.R., Recchia, F., Siciliano, M., Testov, D., Thiel, S., Valiente-Dobón, J.J., and Zell, K.O.

Published
2019
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24. Accessing tens-to-hundreds femtoseconds nuclear state lifetimes with low-energy binary heavy-ion reactions

Author

Ciemała, M., Ziliani, S., Crespi, F. C. L., Leoni, S., Fornal, B., Maj, A., Bednarczyk, P., Benzoni, G., Bracco, A., Boiano, C., Bottoni, S., Brambilla, S., Bast, M., Beckers, M., Braunroth, T., Camera, F., Cieplicka-Oryńczak, N., Clément, E., Coelli, S., Dorvaux, O., Erturk, S., De France, G., Fransen, C., Goldkuhle, A., Grębosz, J., Harakeh, M. N., Iskra, Ł. W., Jacquot, B., Karpov, A., Kicińska-Habior, M., Kim, Y.-H., Kmiecik, M., Lemasson, A., Lenzi, S. M., Lewitowicz, M., Li, H., Matea, I., Mazurek, K., Michelagnoli, C., Matejska-Minda, M., Million, B., Müller-Gatermann, C., Nanal, V., Napiorkowski, P., Napoli, D. R., Palit, R., Rejmund, M., Schmitt, Ch., Stanoiu, M., Stefan, I., Vardaci, E., Wasilewska, B., Wieland, O., Ziębliński, M., and Zielińska, M.

Published
2021
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25. Addendum: The observation of vibrating pear-shapes in radon nuclei

Author

Butler, P. A., Gaffney, L. P., Spagnoletti, P., Konki, J., Scheck, M., Smith, J. F., Abrahams, K., Bowry, M., Cederkäll, J., Chupp, T., de Angelis, G., De Witte, H., Garrett, P. E., Goldkuhle, A., Henrich, C., Illana, A., Johnston, K., Joss, D. T., Keatings, J. M., Kelly, N. A., Komorowska, M., Kröll, T., Lozano, M., Singh, B. S. Nara, O’Donnell, D., Ojala, J., Page, R. D., Pedersen, L. G., Raison, C., Reiter, P., Rodriguez, J. A., Rosiak, D., Rothe, S., Shneidman, T. M., Siebeck, B., Seidlitz, M., Sinclair, J., Stryjczyk, M., Van Duppen, P., Vinals, S., Virtanen, V., Warr, N., Wrzosek-Lipska, K., and Zielinska, M.

Published
2020
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26. Publisher Correction: The observation of vibrating pear-shapes in radon nuclei

Author

Butler, P. A., Gaffney, L. P., Spagnoletti, P., Konki, J., Scheck, M., Smith, J. F., Abrahams, K., Bowry, M., Cederkäll, J., Chupp, T., de Angelis, G., De Witte, H., Garrett, P. E., Goldkuhle, A., Henrich, C., Illana, A., Johnston, K., Joss, D. T., Keatings, J. M., Kelly, N. A., Komorowska, M., Kröll, T., Lozano, M., Singh, B. S. Nara, O’Donnell, D., Ojala, J., Page, R. D., Pedersen, L. G., Raison, C., Reiter, P., Rodriguez, J. A., Rosiak, D., Rothe, S., Shneidman, T. M., Siebeck, B., Seidlitz, M., Sinclair, J., Stryjczyk, M., Van Duppen, P., Vinals, S., Virtanen, V., Warr, N., Wrzosek-Lipska, K., and Zielinska, M.

Published
2020
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28. First-line therapy for adults with advanced renal cell carcinoma: a systematic review and network meta-analysis

Author

Aldin, Angela, additional, Besiroglu, Burcu, additional, Adams, Anne, additional, Monsef, Ina, additional, Piechotta, Vanessa, additional, Tomlinson, Eve, additional, Hornbach, Carolin, additional, Dressen, Nadine, additional, Goldkuhle, Marius, additional, Maisch, Philipp, additional, Dahm, Philipp, additional, Heidenreich, Axel, additional, and Skoetz, Nicole, additional

Published
2023
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29. The observation of vibrating pear-shapes in radon nuclei

Author

Butler, P. A., Gaffney, L. P., Spagnoletti, P., Konki, J., Scheck, M., Smith, J. F., Abrahams, K., Bowry, M., Cederkäll, J., Chupp, T., de Angelis, G., De Witte, H., Garrett, P. E., Goldkuhle, A., Henrich, C., Illana, A., Johnston, K., Joss, D. T., Keatings, J. M., Kelly, N. A., Komorowska, M., Kröll, T., Lozano, M., Nara Singh, B. S., O’Donnell, D., Ojala, J., Page, R. D., Pedersen, L. G., Raison, C., Reiter, P., Rodriguez, J. A., Rosiak, D., Rothe, S., Shneidman, T. M., Siebeck, B., Seidlitz, M., Sinclair, J., Stryjczyk, M., Van Duppen, P., Vinals, S., Virtanen, V., Warr, N., Wrzosek-Lipska, K., and Zielinska, M.

Published
2019
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33. Transparent reporting of meta-analyses of time-to-event outcomes based on aggregate data from randomized trials of interventions (META-TTE reporting guideline)

Author

Skoetz, Nicole, Tierney, Jayne, Ana-Mihaela Bora, Burdett, Sarah, Goldkuhle, Marius, Bender, Ralf, Hirsch, Caroline, Fisher, David J., Kreuzberger, Nina, and Iannizzi, Claire

Subjects
Meta-analysis, Reporting, Evidence synthesis, Time-to-event analysis, Medicine and Health Sciences, Systematic review, Survival analysis
Abstract

This project will provide an addendum to currently existing guidelines for reporting evidence syntheses to support authors who report the results of their time-to-event meta-analyses based on aggregate data from RCTs.

Published
2023
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34. Lifetime measurement of excited states in 46Ti

Author

Goldkuhle, A., Fransen, C., Dewald, A., Arnswald, K., Bast, M., Beckers, M., Blazhev, A., Braunroth, T., Hackenberg, G., Häfner, G., Litzinger, J., Jolie, J., Müller-Gatermann, C., von Spee, F., Warr, N., Werner, D., and Zell, K. O.

Published
2019
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35. Albert Verbeek, Schwarzrheindorf, die Doppelkirche und ihre Wandgemälde

Author

Goldkuhle, F.

Abstract

Rezension zu: Albert Verbeek, Schwarzrheindorf, die Doppelkirche und ihre Wandgemälde. L. Schwann, Düsseldorf 1953. 4°, 78 S., 64 Abb., 4 Farbtafeln., Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 7 Nr. 6 (1954): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege

Published
2022
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36. GRADE – Summary-of-findings-Tabellen und Evidenzprofile richtig verstehen

Author

Csenar, Mario, Hirsch, Caroline, Goldkuhle, Marius, Töws, Ingrid, and Wagner, Carina

Subjects
Medicine and health
Abstract

Beschreibung: Summary-of-Findings(SoF)-Tabellen und Evidenzprofile dienen im Rahmen der GRADE-Bewertung der übersichtlichen Ergebnispräsentation in systematischen Übersichtsarbeiten und Leitlinien und können mit unterschiedlichen Softwares, z.B. GRADEpro, MagicApp, erstellt werden. [zum vollständigen Text gelangen Sie über die oben angegebene URL]

Published
2022
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37. Time-to-event analyses in meta-analyses: meta-epidemiological assessment of systematic reviews and their included randomized controlled trials (META-TTE)

Author

Kreuzberger, Nina, Skoetz, Nicole, Bender, Ralf, van Dalen, Elvira, Hemkens, Lars, Monsef, Ina, Trivella, Marialena, and Goldkuhle, Marius

Subjects
Statistics and Probability, Medical Sciences, Biometry, Epidemiology, Medical Biomathematics and Biometrics, Survival analysis, Statistical Methodology, Meta-analysis, GRADE, Risk of Bias, Time-to-event analysis, Medicine and Health Sciences, Physical Sciences and Mathematics, Systematic review, Clinical Epidemiology, Public Health
Abstract

Background: Measurements and comparisons of event times in clinical research are based on time-to-event analyses, or survival analyses as they are more generally referred to. For example, in oncology and cardiology where overall mortality, that is evaluating the occurrence of the event ‘death’ irrespective of its cause, is one of the most explored time-to-event outcomes. Various statistical methods to analyze time-to-event outcomes are available, including the non-parametric method proposed by Kaplan and Meier or the semi-parametric Cox proportional hazards model, which allows the calculation of the widely used hazard ratio for between group comparisons. Methods of time-to-event analysis are associated with methodological peculiarities and their results are not always easy to interpret. Challenges include the potential for informative censoring, possible competing events and situations where the underlying assumption of proportional hazards of the Cox model does not hold. For time-to-event meta-analyses based on aggregated data, which are increasingly used in systematic reviews and guidelines, existing instructions for authors are primarily focused on the recovery of data in order to pool effect estimators and leave the confidence in the included estimators largely untouched. Due to the difficulties and requirements of time-to-event analyses, the lack of guidance carries a high risk of limited review quality if existing uncertainties in primary studies are not adequately identified, considered and reported. Aim: To determine how systematic review authors deal with the specifics of time-to-event analyses in meta-analyses of time-to-event outcomes. Proposed methods: Using a meta-epidemiological study approach and two-stage assessment, we will extract information on the handling of time-to-event outcomes from systematic reviews and the respective trials included in them. We will identify 50 Cochrane and 50 non-Cochrane systematic reviews published during the same time-period on the Cochrane Database of Systematic Reviews and Medline. Eligible reviews will be required to include at least one time-to-event meta-analysis of aggregated data over at least two randomized controlled trials. All project steps, including the screening and selection of relevant reviews and trials as well as the extraction of data, will be performed in duplicate. Data will be extracted for each systematic review, meta-analyzed time-to-event review outcome, trial and analyzed trial outcome and will include general (e.g. publication information, PICO questions, sample sizes, general methods, risk of bias and GRADE assessments, etc.) and time-to-event (meta-)analytic information (e.g. outcome definitions, effect measures, follow-up durations, censoring (for non-administrative reasons) and competing events as well as their consideration in reviews (e.g. through sensitivity analyses, risk of bias ratings or discussion)). We will also extract effect estimators both of meta-analyses and trials and will recalculate meta-analyses, should discrepancies be identified in the selection or generation of effect measures from primary trials, in order to perform error analyses. We will use a flexible database to manage and analyze our generated data over multiple levels. Given the exploratory nature of this project, the planned statistical analyses are primarily descriptive and we will use relative effect measures and corresponding confidence intervals for between group comparisons. To allow adequate interpretability and comparisons across and within subgroups of reviews, we plan to analyse our findings respecting relevant clusters (e.g. Cochrane vs. non-Cochrane systematic reviews, different medical fields, different intervention types, different types of outcomes (single event versus composite, primary versus non-primary, competing events possible versus no-competing events possible)).

Published
2022
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38. Randomized controlled trial participants receiving the intervention assigned to the comparator arm: a meta-epidemiological study (Meta-crowd)

Author

Kreuzberger, Nina, Goldkuhle, Marius, Skoetz, Nicole, Lischetzki, Tina, Affengruber, Lisa, Akl, Elie, Braun, Cordula, van Dalen, Elvira, Ernst, Moritz, Hirt, Julian, Klugar, Miloslav, Mathes, Tim, Menges, Dominik, Messer, Melanie, Monsef, Ina, Mustafa, Reem, Rombey, Tanja, Siemens, Waldemar, Trivella, Marialena, Vetsch, Janine, and Hemkens, Lars

Subjects
Statistics and Probability, Methods systematic review, Public health, Meta-epidemiology, Physical Sciences and Mathematics, Medicine and Health Sciences, Meta-crowd, Randomized controlled trials, Health sciences, Clinical Trials, FOS: Health sciences, Statistical Methodology
Abstract

Participants of randomized controlled trials (RCTs) sometimes receive the intervention (e.g., a drug or drug combination, surgical procedure, behavioral program, screening intervention etc.) initially allocated to a respective comparator arm (i.e., participants in the intervention group receive the control group’s intervention and vice versa). Reasons for the reception of a comparator intervention are manifold; they include patient-related, practical and/or ethical issues. However, such changes may affect the interpretation of the comparisons and the translation of study results into clinical practice (e.g., through clinical guidelines). The aim of the current methodological review is to i) explore and assess the frequency of trial participants in the control arm receiving the intervention planned for intervention arm and vice versa in recent RCTs and the modalities of this practice (e.g., reasons, decision criteria, pre-specification and awareness to allocation of participants and personnel); and ii) to identify similarities and differences in trials across intervention types and clinical fields.

Published
2022
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39. Spectroscopy of neutron-rich nitrogen isotopes with Agata+Paris+Vamos

Author

S. Ziliani, M. Ciemała, F.C.L. Crespi, S. Leoni, B. Fornal, A. Maj, P. Bednarczyk, G. Benzoni, A. Bracco, C. Boiano, S. Bottoni, S. Brambilla, M. Bast, M. Beckers, T. Braunroth, F. Camera, N. Cieplicka-Oryńczak, E. Clément, S. Coelli, O. Dorvaux, S. Erturk, G. de France, C. Fransen, A. Goldkuhle, J. Grębosz, M.N. Harakeh, Ł.W. Iskra, B. Jacquot, A. Karpov, M. Kicińska-Habior, Y. Kim, M. Kmiecik, A. Lemasson, S.M. Lenzi, M. Lewitowicz, H. Li, I. Matea, K. Mazurek, C. Michelagnoli, M. Matejska-Minda, B. Million, C. Müller-Gatermann, V. Nanal, P. Napiorkowski, D.R. Napoli, R. Palit, M. Rejmund, Ch. Schmitt, M. Stanoiu, I. Stefan, E. Vardaci, B. Wasilewska, O. Wieland, M. Ziębliński, M. Zielińska, Ziliani, S., Ciemała, M., Crespi, F. C. L., Leoni, S., Fornal, B., Maj, A., Bednarczyk, P., Benzoni, G., Bracco, A., Boiano, C., Bottoni, S., Brambilla, S., Bast, M., Beckers, M., Braunroth, T., Camera, F., Cieplicka-Orynczak, N., Clément, E., Coelli, S., Dorvaux, O., Erturk, S., de France, G., Fransen, C., Goldkuhle, A., Grebosz, J., Harakeh, M. N., Iskra, Ł. W., Jacquot, B., Karpov, A., Kicinska-Habior, M., Kim, Y., Kmiecik, M., Lemasson, A., Lenzi, S. M., Lewitowicz, M., Li, H., Matea, I., Mazurek, K., Michelagnoli, C., Matejska-Minda, M., Million, B., Müller-Gatermann, C., Nanal, V., Napiorkowski, P., Napoli, D. R., Palit, R., Rejmund, M., Schmitt, Ch., Stanoiu, M., Stefan, I., Vardaci, E., Wasilewska, B., Wieland, O., Zieblinski, M., Zielinska, M., Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), ILL, and Research unit Nuclear & Hadron Physics

Subjects
Physics, education.field_of_study, Spectrometer, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Population, Gamma ray, General Physics and Astronomy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, Excited state, 0103 physical sciences, Neutron, AGATA, 010306 general physics, Spectroscopy, education, Beam (structure)
Abstract

Excited states of 17N, 18N and 19N were investigated through the measurement of gamma rays, following their population via deep-inelastic reactions induced by an 18O beam (7 MeV/u) on a thick 181Ta target. The experimental setup comprised the AGATA+PARIS detection system, coupled to the VAMOS++ magnetic spectrometer. In the 17N nucleus, the analysis of gamma-ray transitions de-exciting two states around 4-5 MeV clearly pointed to discrepancies with the lifetime values reported in literature. Three new gamma rays were observed in 18N at the energies of 1662.3 (3) keV, 2073.4 (8) keV and 2300.9 (8) keV, and hints for other two new transitions around 1566 keV and 1720 keV were found. In addition, a new transition with energy of 2489.7 (8) keV was observed in 19N.

Published
2020

40. Lifetime measurement of the 21+, 41+ states in semi-magic 60Ni.

Author

Beckers, Marcel, Müller-Gatermann, Claus, Arnswald, Konrad, Braunroth, Thomas, Dewald, Alfred, Fransen, Christoph, Goldkuhle, Alina, and von Spee, Franziskus

Subjects
COINCIDENCE, MEASUREMENT
Abstract

A γ - γ coincidence Recoil Distance Doppler-Shift measurement has been carried out on 60 Ni to re-measure the lifetime of the 2 1 + and 4 1 + states. The new lifetime of the 2 1 + state supports the adopted NNDC value but disagrees with the results of two more recent Doppler-Shift Attenuation Method measurements, which suggested a longer lifetime. The new result for the 4 1 + state's lifetime is significantly shorter than the one recommended in the latest NNDC compilation while also reducing its uncertainty. It therefore resolves an unclear situation, where an unexpected drop in transition strength appeared from 58 Ni to 60 Ni. Both values match very well with recently applied shell model calculations using the GXPF1A interaction. [ABSTRACT FROM AUTHOR]

Published
2023
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41. Coulomb excitation of Rn-222

Author

Spagnoletti, P., Butler, P. A., Gaffney, L. P., Abrahams, K., Bowry, M., Cederkäll, J., Chupp, T., de Angelis, G., De Witte, H., Garrett, P. E., Goldkuhle, A., Henrich, C., Illana, A., Johnston, K., Joss, D. T., Keatings, J. M., Kelly, N. A., Komorowska, M., Konki, J., Kröll, T., Lozano, M., Singh, B. S. Nara, O'Donnell, D., Ojala, J., Page, R. D., Pedersen, L. G., Raison, C., Reiter, P., Rodriguez, J. A., Rosiak, D., Rothe, S., Scheck, M., Seidlitz, M., Shneidman, T. M., Siebeck, B., Sinclair, J., Smith, J. F., Stryjczyk, M., Van Duppen, P., Viñals, S., Virtanen, V., Wrzosek-Lipska, K., Warr, N., and Zielińska, M.

Subjects
Science & Technology, Physics, Nuclear, STATES, Physics, SHAPES, Physical Sciences, ISOTOPES, RADON
Abstract

The nature of quadrupole and octupole collectivity in 222Rn was investigated by determining the electric-quadrupole (E2) and octupole (E3) matrix elements using subbarrier, multistep Coulomb excitation. The radioactive 222Rn beam, accelerated to 4.23 MeV/u, was provided by the HIE-ISOLDE facility at CERN. Data were collected in the Miniball γ-ray spectrometer following the bombardment of two targets, 120Sn and 60Ni. Transition E2 matrix elements within the ground-state and octupole bands were measured up to 10ℏ and the results were consistent with a constant intrinsic electric-quadrupole moment, 518(11)efm2. The values of the intrinsic electric-octupole moment for the 0+→3− and 2+→5− transitions were found to be respectively 2360+300−210efm3 and 2300+300−500efm3 while a smaller value, 1200+500−900efm3, was found for the 2+→1− transition. In addition, four excited non-yrast states were identified in this work via γ−γ coincidences.

Published
2022

42. Coulomb excitation of 222Rn

Author

Spagnoletti, P., Butler, P. A., Gaffney, L. P., Abrahams, K., Bowry, M., Cederkäll, J., Chupp, T., de Angelis, G., De Witte, H., Garrett, P. E., Goldkuhle, A., Henrich, C., Illana, A., Johnston, K., Joss, D. T., Keatings, J. M., Kelly, N. A., Komorowska, M., Konki, J., Kröll, T., Lozano, M., Singh, B. S. Nara, O'Donnell, D., Ojala, J., Page, R. D., Pedersen, L. G., Rais

Published
2022
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43. Coulomb excitation of 222Rn

Author

Spagnoletti, P., Butler, P.A., Gaffney, L.P., Abrahams, K., Bowry, M., Cederkäll, J., Chupp, T., de Angelis, G., de Witte, H., Garrett, P.E., Goldkuhle, A., Henrich, C., Illana, A., Johnston, K., Joss, D.T., Keatings, J.M., Kelly, N.A., Komorowska, M., Konki, J., Kröll, T., Lozano, M., Singh, B.S. Nara, O'Donnell, D., Ojala, J., Page, R.D., Pedersen, L.G., Raison, C., Reiter, P., Rodriguez, J.A., Rosiak, D., Rothe, S., Scheck, M., Seidlitz, M., Shneidman, T.M., Siebeck, B., Sinclair, J., Smith, J.F., Stryjczyk, M., van Duppen, P., Viñals, S., Virtanen, V., Wrzosek-Lipska, K., Warr, N., Zielińska, M., Helsinki Institute of Physics, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
A ≥ 220, electromagnetic transitions, nuclear structure & decays, Nuclear Physics - Experiment, radon, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ydinfysiikka, 114 Physical sciences
Abstract

International audience; The nature of quadrupole and octupole collectivity in $^{222}$Rn was investigated by determining the electric-quadrupole (E2) and octupole (E3) matrix elements using subbarrier, multistep Coulomb excitation. The radioactive $^{222}$Rn beam, accelerated to 4.23 MeV/u, was provided by the HIE-ISOLDE facility at CERN. Data were collected in the Miniball $\gamma$ -ray spectrometer following the bombardment of two targets, $^{120}$Sn and $^{60}$Ni. Transition E2 matrix elements within the ground-state and octupole bands were measured up to 10 ¯h and the results were consistent with a constant intrinsic electric-quadrupole moment, 518(11) $e$ fm$^2$ . The values of the intrinsic electric-octupole moment for the $0^+ \to 3^-$ and $2^+ \to 5^-$ transitions were found to be respectively $2360^{+300}_{-210}$ $e$ fm$_3$ and $2300^{+300}_{-500}$ $e$ fm$^3$ while a smaller value, $1200^{+500}_{-900}$ $e$ fm$^3$ , was found for the $2^+ \to 1^-$ transition. In addition, four excited non-yrast states were identified in this work via γ -γ coincidences.

Published
2022

44. Accessing tens-to-hundreds femtoseconds nuclear state lifetimes with low-energy binary heavy-ion reactions

Author

M. Zieblinski, J. Grebosz, K. Mazurek, Simone Coelli, S. Brambilla, H. J. Li, B. Million, M. Rejmund, Bertrand Jacquot, P. Bednarczyk, N. Cieplicka-Oryńczak, M. Ciemala, M. Bast, S. Ziliani, O. Dorvaux, S. Erturk, Eric Clément, Ł. W. Iskra, C. Fransen, S. M. Lenzi, B. Fornal, P. J. Napiorkowski, C. Müller-Gatermann, M. Zielińska, B. Wasilewska, I. Matea, A. Maj, M. Kmiecik, Y. H. Kim, M. Kicińska-Habior, C. Michelagnoli, I. Stefan, M. Beckers, F. C. L. Crespi, O. Wieland, M. Lewitowicz, R. Palit, D. R. Napoli, Ch. Schmitt, A. V. Karpov, M. Stanoiu, F. Camera, Emanuele Vardaci, M. Matejska-Minda, A. Bracco, G. Benzoni, S. Bottoni, S. Leoni, V. Nanal, C. Boiano, A. Lemasson, Mohsen Harakeh, Thomas Braunroth, A. Goldkuhle, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), ILL, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Ciemala, M., Ziliani, S., Crespi, F. C. L., Leoni, S., Fornal, B., Maj, A., Bednarczyk, P., Benzoni, G., Bracco, A., Boiano, C., Bottoni, S., Brambilla, S., Bast, M., Beckers, M., Braunroth, T., Camera, F., Cieplicka-Orynczak, N., Clement, E., Coelli, S., Dorvaux, O., Erturk, S., De France, G., Fransen, C., Goldkuhle, A., Grebosz, J., Harakeh, M. N., Iskra, L. W., Jacquot, B., Karpov, A., Kicinska-Habior, M., Kim, Y. -H., Kmiecik, M., Lemasson, A., Lenzi, S. M., Lewitowicz, M., Li, H., Matea, I., Mazurek, K., Michelagnoli, C., Matejska-Minda, M., Million, B., Muller-Gatermann, C., Nanal, V., Napiorkowski, P., Napoli, D. R., Palit, R., Rejmund, M., Schmitt, C., Stanoiu, M., Stefan, I., Vardaci, E., Wasilewska, B., Wieland, O., Zieblinski, M., Zielinska, M., H. Niewodniczanski Institute of Nuclear Physics, Polska Akademia Nauk = Polish Academy of Sciences (PAN), Dipartimento di Fisica (Milano), Università degli Studi di Milano [Milano] (UNIMI), Istituto Nazionale di Fisica Nucleare, Sezione di Milano (INFN), Istituto Nazionale di Fisica Nucleare (INFN), Institut für Kernphysik der Universität zu Köln, Universität zu Köln, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Milano = University of Milan (UNIMI), Universität zu Köln = University of Cologne, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Nuclear Energy

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Monte Carlo method, Hadron, FOS: Physical sciences, Binary number, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Excited state, 0103 physical sciences, Nuclear fusion, AGATA, Nuclear Experiment (nucl-ex), Connection (algebraic framework), Atomic physics, Nuclear Experiment, 010306 general physics
Abstract

A novel Monte Carlo technique has been developed to determine lifetimes of excited states in the tens-to-hundreds femtoseconds range in products of low-energy heavy-ion binary reactions, with complex velocity distributions. The method is based on a detailed study of Doppler-broadened $$\gamma $$ γ -ray lineshapes. Its relevance is demonstrated in connection with the $$^{18}\text {O}(7.0\, \text {MeV/u})+\,^{181}\text {Ta}$$ 18 O ( 7.0 MeV/u ) + 181 Ta experiment, performed at GANIL with the AGATA+VAMOS+PARIS setup, to study neutron-rich O, C, N, ... nuclei. Excited states in $$^{17}\text {O}$$ 17 O and $$^{19}\text {O}$$ 19 O , with known lifetimes, are used to validate the method over the $$\sim 20{-}400\,\text {fs}$$ ∼ 20 - 400 fs lifetime-sensitivity range. Emphasis is given to the unprecedented position resolution provided by $$\gamma $$ γ -tracking arrays, which turns out to be essential for reaching the required accuracy in Doppler-shift correction. The technique is anticipated to be an important tool for lifetime investigations in exotic neutron-rich nuclei, produced with intense ISOL-type beams.

Published
2021

45. Microscopic structure of the one-phonon 2(+) states of Po-208

Author

Kalaydjieva D, Kocheva D, Rainovski G, Karayonchev V, Jolie J, Pietralla N, Beckers M, Blazhev A, Dewald A, Djongolov M, Esmaylzadeh A, Fransen C, Gladnishki KA, Goldkuhle A, Henrich C, Homm I, Ide KE, John PR, Kern R, Kleemann J, Kroll T, Muller-Gatermann C, Scheck M, Spagnoletti P, Stoyanova M, Stoychev K, Werner V, Yaneva A, Dimitrova SS, De Gregorio G, Naidja H, Gargano A, Kalaydjieva, D, Kocheva, D, Rainovski, G, Karayonchev, V, Jolie, J, Pietralla, N, Beckers, M, Blazhev, A, Dewald, A, Djongolov, M, Esmaylzadeh, A, Fransen, C, Gladnishki, Ka, Goldkuhle, A, Henrich, C, Homm, I, Ide, Ke, John, Pr, Kern, R, Kleemann, J, Kroll, T, Muller-Gatermann, C, Scheck, M, Spagnoletti, P, Stoyanova, M, Stoychev, K, Werner, V, Yaneva, A, Dimitrova, S, De Gregorio, G, Naidja, H, and Gargano, A

Published
2021

46. Complete set of bound negative-parity states in the neutron-rich nucleus

Author

Ziliani S., Ciemala M., Crespi F. C. L., Leoni S., Fornal B., Suzuki T., Otsuka T., Maj A., Bednarczyk P., Benzoni G., Bracco A., Boiano C., Bottoni S., Brambilla S., Bast M., Beckers M., Braunroth T., Camera F., Cieplicka-Orynczak N., Clement E., Coelli S., Dorvaux O., Erturk S., de France G., Fransen C., Goldkuhle A., Grebosz J., Harakeh M. N., Iskra L. W., Jacquot B., Karpov A., Kicinska-Habior M., Kim Y., Kmiecik M., Lemasson A., Lenzi S. M., Lewitowicz M., Li H., Matea I., Mazurek K., Michelagnoli C., Matejska-Minda M., Million B., Muller-Gatermann C., Nanal V., Napiorkowski P., Napoli D. R., Palit R., Rejmund M., Schmitt CH., Stanoiu M., Stefan I., Vardaci E., Wasilewska B., Wieland O., Zieblinski M., Zielinska M., Ziliani, S., Ciemala, M., Crespi, F. C. L., Leoni, S., Fornal, B., Suzuki, T., Otsuka, T., Maj, A., Bednarczyk, P., Benzoni, G., Bracco, A., Boiano, C., Bottoni, S., Brambilla, S., Bast, M., Beckers, M., Braunroth, T., Camera, F., Cieplicka-Orynczak, N., Clement, E., Coelli, S., Dorvaux, O., Erturk, S., de France, G., Fransen, C., Goldkuhle, A., Grebosz, J., Harakeh, M. N., Iskra, L. W., Jacquot, B., Karpov, A., Kicinska-Habior, M., Kim, Y., Kmiecik, M., Lemasson, A., Lenzi, S. M., Lewitowicz, M., Li, H., Matea, I., Mazurek, K., Michelagnoli, C., Matejska-Minda, M., Million, B., Muller-Gatermann, C., Nanal, V., Napiorkowski, P., Napoli, D. R., Palit, R., Rejmund, M., Schmitt, Ch., Stanoiu, M., Stefan, I., Vardaci, E., Wasilewska, B., Wieland, O., Zieblinski, M., and Zielinska, M.

Abstract

High-resolution -ray spectroscopy of is performed with the Advanced GAmma Tracking Array, following deep-inelastic processes induced by an beam on a target. Six states are newly identified, which together with the three known excitations exhaust all negative-parity excited states expected in below the neutron threshold. Spin and parities are proposed for all located states on the basis of decay branchings and comparison with large-scale shell-model calculations performed in the p-sd space, with the YSOX interaction. Of particular interest is the location of the and excitations, which provide strong constrains for cross-shell p-sd matrix elements based on realistic interactions and help to simultaneously reproduce the ground and first-excited states in and , for the first time. Understanding the structure may also have significant impact on neutron-capture cross-section calculations in r-process modeling including light neutron-rich nuclei.

Published
2021

47. Complete set of bound negative-parity states in the neutron-rich nucleus 18N

Author

S. Ziliani, M. Ciemała, F. C. L. Crespi, S. Leoni, B. Fornal, T. Suzuki, T. Otsuka, A. Maj, P. Bednarczyk, G. Benzoni, A. Bracco, C. Boiano, S. Bottoni, S. Brambilla, M. Bast, M. Beckers, T. Braunroth, F. Camera, N. Cieplicka-Oryńczak, E. Clément, S. Coelli, O. Dorvaux, S. Erturk, G. de France, C. Fransen, A. Goldkuhle, J. Grębosz, M. N. Harakeh, Ł. W. Iskra, B. Jacquot, A. Karpov, M. Kicińska-Habior, Y. Kim, M. Kmiecik, A. Lemasson, S. M. Lenzi, M. Lewitowicz, H. Li, I. Matea, K. Mazurek, C. Michelagnoli, M. Matejska-Minda, B. Million, C. Müller-Gatermann, V. Nanal, P. Napiorkowski, D. R. Napoli, R. Palit, M. Rejmund, Ch. Schmitt, M. Stanoiu, I. Stefan, E. Vardaci, B. Wasilewska, O. Wieland, M. Ziębliński, M. Zielińska, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), ILL, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
Set (abstract data type), Physics, Particle physics, medicine.anatomical_structure, 010308 nuclear & particles physics, 0103 physical sciences, medicine, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 010306 general physics, Parity (mathematics), 01 natural sciences, Nucleus
Abstract

International audience; High-resolution γ-ray spectroscopy of N18 is performed with the Advanced GAmma Tracking Array, following deep-inelastic processes induced by an O18 beam on a Ta181 target. Six states are newly identified, which together with the three known excitations exhaust all negative-parity excited states expected in N18 below the neutron threshold. Spin and parities are proposed for all located states on the basis of decay branchings and comparison with large-scale shell-model calculations performed in the p-sd space, with the YSOX interaction. Of particular interest is the location of the 01− and 12− excitations, which provide strong constrains for cross-shell p-sd matrix elements based on realistic interactions and help to simultaneously reproduce the ground and first-excited states in N16 and N18, for the first time. Understanding the N18 structure may also have significant impact on neutron-capture cross-section calculations in r-process modeling including light neutron-rich nuclei.

Published
2021

49. Complete set of bound negative-parity states in the neutron-rich nucleus N18

Author

Ziliani, S., primary, Ciemała, M., additional, Crespi, F. C. L., additional, Leoni, S., additional, Fornal, B., additional, Suzuki, T., additional, Otsuka, T., additional, Maj, A., additional, Bednarczyk, P., additional, Benzoni, G., additional, Bracco, A., additional, Boiano, C., additional, Bottoni, S., additional, Brambilla, S., additional, Bast, M., additional, Beckers, M., additional, Braunroth, T., additional, Camera, F., additional, Cieplicka-Oryńczak, N., additional, Clément, E., additional, Coelli, S., additional, Dorvaux, O., additional, Erturk, S., additional, de France, G., additional, Fransen, C., additional, Goldkuhle, A., additional, Grębosz, J., additional, Harakeh, M. N., additional, Iskra, Ł. W., additional, Jacquot, B., additional, Karpov, A., additional, Kicińska-Habior, M., additional, Kim, Y., additional, Kmiecik, M., additional, Lemasson, A., additional, Lenzi, S. M., additional, Lewitowicz, M., additional, Li, H., additional, Matea, I., additional, Mazurek, K., additional, Michelagnoli, C., additional, Matejska-Minda, M., additional, Million, B., additional, Müller-Gatermann, C., additional, Nanal, V., additional, Napiorkowski, P., additional, Napoli, D. R., additional, Palit, R., additional, Rejmund, M., additional, Schmitt, Ch., additional, Stanoiu, M., additional, Stefan, I., additional, Vardaci, E., additional, Wasilewska, B., additional, Wieland, O., additional, Ziębliński, M., additional, and Zielińska, M., additional

Published
2021
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50. Lifetime measurements in the even-even Cd102–108 isotopes

Author

M. Siciliano, J. J. Valiente-Dobón, A. Goasduff, T. R. Rodríguez, D. Bazzacco, G. Benzoni, T. Braunroth, N. Cieplicka-Oryńczak, E. Clément, F. C. L. Crespi, G. de France, M. Doncel, S. Ertürk, C. Fransen, A. Gadea, G. Georgiev, A. Goldkuhle, U. Jakobsson, G. Jaworski, P. R. John, I. Kuti, A. Lemasson, H. Li, A. Lopez-Martens, T. Marchi, D. Mengoni, C. Michelagnoli, T. Mijatović, C. Müller-Gatermann, D. R. Napoli, J. Nyberg, M. Palacz, R. M. Pérez-Vidal, B. Sayği, D. Sohler, S. Szilner, and D. Testov

Subjects
Physics, Nuclear physics, Nuclear interaction, medicine.anatomical_structure, Isotope, 010308 nuclear & particles physics, Nuclear Theory, 0103 physical sciences, medicine, Nuclear Experiment, 010306 general physics, 01 natural sciences, Nucleus
Abstract

Background: The heaviest T-z = 0 doubly-magic nucleus, Sn-100, and the neighboring nuclei offer unique opportunities to investigate the properties of nuclear interaction. For instance, the structur ...

Published
2021

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