☆ 4.7 Article

Search for charge non-conserving processes in 127I by coincidence technique

EUROPEAN PHYSICAL JOURNAL C (2012)

Journal

EUROPEAN PHYSICAL JOURNAL C

Volume 72, Issue 3, Pages -

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SPRINGER

DOI: 10.1140/epjc/s10052-012-1920-6

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Physics, Particles & Fields

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Abstract

New lifetime limits on the charge non-conserving (CNC) electron capture with excitation of the 417.9 keV nuclear level in the I-127 are established by using the coincidence technique. The analysed exposure is 0.87 ton x yr, collected deep underground at the Gran Sasso National Laboratory of the INFN by the highly radiopure DAMA/LIBRA setup (approximate to 250 kg of highly radiopure NaI(Tl)). The new limit on the mean life is tau > 1.2 x 10(24) yr (90 % C.L.), about one order of magnitude larger than those previously available for CNC electron capture involving nuclear level excitations of I-127 and of the same order of magnitude than those achieved for analogous processes in Xe-129.

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Article Astronomy & Astrophysics

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Article Astronomy & Astrophysics

A polarimetrically oriented X-ray stare at the accreting pulsar EXO 2030+375

Christian Malacaria, Jeremy Heyl, Victor Doroshenko, Sergey S. Tsygankov, Juri Poutanen, Sofia V. Forsblom, Fiamma Capitanio, Alessandro Di Marco, Yujia Du, Lorenzo Ducci, Fabio La Monaca, Alexander A. Lutovinov, Herman L. Marshall, Ilya A. Mereminskiy, Sergey V. Molkov, Alexander A. Mushtukov, Mason Ng, Pierre-Olivier Petrucci, Andrea Santangelo, Andrey E. Shtykovsky, Valery F. Suleimanov, Ivan Agudo, Lucio A. Antonelli, Matteo Bachetti, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stefano Bianchi, Stephen D. Bongiorno, Raffaella Bonino, Alessandro Brez, Niccolo Bucciantini, Simone Castellano, Elisabetta Cavazzuti, Chien-Ting Chen, Stefano Ciprini, Enrico Costa, Alessandra De Rosa, Ettore Del Monte, Laura Di Gesu, Niccolo Di Lalla, Immacolata Donnarumma, Michal Dovciak, Steven R. Ehlert, Teruaki Enoto, Yuri Evangelista, Sergio Fabiani, Riccardo Ferrazzoli, Javier A. Garcia, Shuichi Gunji, Kiyoshi Hayashida, Wataru Iwakiri, Svetlana G. Jorstad, Philip Kaaret, Vladimir Karas, Fabian Kislat, Takao Kitaguchi, Jeffery J. Kolodziejczak, Henric Krawczynski, Luca Latronico, Ioannis Liodakis, Simone Maldera, Alberto Manfreda, Frederic Marin, Andrea Marinucci, Alan P. Marscher, Francesco Massaro, Giorgio Matt, Ikuyuki Mitsuishi, Tsunefumi Mizuno, Fabio Muleri, Michela Negro, Chi-Yung Ng, Stephen L. O'Dell, Nicola Omodei, Chiara Oppedisano, Alessandro Papitto, George G. Pavlov, Abel L. Peirson, Matteo Perri, Melissa Pesce-Rollins, Maura Pilia, Andrea Possenti, Simonetta Puccetti, Brian D. Ramsey, John Rankin, Ajay Ratheesh, Oliver J. Roberts, Roger W. Romani, Carmelo Sgro, Patrick Slane, Paolo Soffitta, Gloria Spandre, Douglas A. Swartz, Toru Tamagawa, Fabrizio Tavecchio, Roberto Taverna, Yuzuru Tawara, Allyn F. Tennant, Nicholas E. Thomas, Francesco Tombesi, Alessio Trois, Roberto Turolla, Jacco Vink, Martin C. Weisskopf, Kinwah Wu, Fei Xie, Silvia Zane

Summary: Accreting X-ray pulsars are expected to have a high polarization degree, but recent observations of EXO 2030+375 with IXPE show a low degree of polarization in both phase-averaged and phase-resolved studies. Using the rotating vector model, the magnetic obliquity is estimated to be around 60 degrees, indicating that the magnetic axis swings close to the observer's line of sight. The joint analysis of polarization, spectral, and timing data suggests a complex accreting geometry influenced by magnetic multipoles and gravitational light bending.

ASTRONOMY & ASTROPHYSICS (2023)

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Article Astronomy & Astrophysics

X-Ray Polarimetry Reveals the Magnetic-field Topology on Sub-parsec Scales in Tycho's Supernova Remnant

Riccardo Ferrazzoli, Patrick Slane, Dmitry Prokhorov, Ping Zhou, Jacco Vink, Niccolo Bucciantini, Enrico Costa, Niccolo Di Lalla, Alessandro Di Marco, Paolo Soffitta, Martin C. Weisskopf, Kazunori Asakura, Luca Baldini, Jeremy Heyl, Philip E. Kaaret, Frederic Marin, Tsunefumi Mizuno, C. -Y. Ng, Melissa Pesce-Rollins, Stefano Silvestri, Carmelo Sgro, Douglas A. Swartz, Toru Tamagawa, Yi-Jung Yang, Ivan Agudo, Lucio A. Antonelli, Matteo Bachetti, Wayne H. Baumgartner, Ronaldo Bellazzini, Stefano Bianchi, Stephen D. Bongiorno, Raffaella Bonino, Alessandro Brez, Fiamma Capitanio, Simone Castellano, Elisabetta Cavazzuti, Chien-Ting Chen, Stefano Ciprini, Alessandra De Rosa, Ettore Del Monte, Laura Di Gesu, Immacolata Donnarumma, Victor Doroshenko, Michal Dovciak, Steven R. Ehlert, Teruaki Enoto, Yuri Evangelista, Sergio Fabiani, Javier A. Garcia, Shuichi Gunji, Kiyoshi Hayashida, Wataru Iwakiri, Svetlana G. Jorstad, Fabian Kislat, Vladimir Karas, Takao Kitaguchi, Jeffery J. Kolodziejczak, Henric Krawczynski, Fabio La Monaca, Luca Latronico, Ioannis Liodakis, Simone Maldera, Alberto Manfreda, Andrea Marinucci, Alan P. Marscher, Herman L. Marshall, Giorgio Matt, Ikuyuki Mitsuishi, Fabio Muleri, Michela Negro, Stephen L. O'Dell, Nicola Omodei, Chiara Oppedisano, Alessandro Papitto, George G. Pavlov, Abel L. Peirson, Matteo Perri, Pierre-Olivier Petrucci, Maura Pilia, Andrea Possenti, Juri Poutanen, Simonetta Puccetti, Brian D. Ramsey, John Rankin, Ajay Ratheesh, Oliver Roberts, Roger W. Romani, Gloria Spandre, Fabrizio Tavecchio, Roberto Taverna, Yuzuru Tawara, Allyn F. Tennant, Nicholas E. Thomas, Francesco Tombesi, Alessio Trois, Sergey S. Tsygankov, Roberto Turolla, Kinwah Wu, Fei Xie, Silvia Zane

Summary: This study reports the detection of a localized polarization signal from the synchrotron X-ray emitting regions of Tycho's supernova remnant. The degree of polarization for the X-ray synchrotron emission is 9% +/- 2% averaged over the whole remnant, and 12% +/- 2% at the rim, higher than the polarization value observed in the radio band. In the west region, the degree of polarization is 23% +/- 4%. These results suggest a more ordered magnetic field or a larger turbulence scale in Tycho compared to Cassiopeia A.

ASTROPHYSICAL JOURNAL (2023)

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Article Astronomy & Astrophysics

IXPE Observations of the Quintessential Wind-accreting X-Ray Pulsar Vela X-1

Sofia Forsblom, Juri S. Poutanen, Sergey Tsygankov, Matteo Bachetti, Alessandro Di Marco, Victor Doroshenko, Jeremy Heyl, Fabio La Monaca, Christian L. Malacaria, Herman Marshall, Fabio A. Muleri, Alexander Mushtukov, Maura Pilia, Daniele F. Rogantini, Valery Suleimanov, Roberto Taverna, Fei Xie, Ivan A. Agudo, Lucio Antonelli, Luca H. Baldini, Wayne Baumgartner, Ronaldo Bellazzini, Stefano D. Bianchi, Stephen Bongiorno, Raffaella Bonino, Alessandro Brez, Niccolo Bucciantini, Fiamma Capitanio, Simone Castellano, Elisabetta Cavazzuti, Chien-Ting Chen, Stefano Ciprini, Enrico Costa, Alessandra De Rosa, Ettore Del Monte, Laura Di Gesu, Niccolo Di Lalla, Immacolata Donnarumma, Michal R. Dovciak, Steven Ehlert, Teruaki Enoto, Yuri Evangelista, Sergio Fabiani, Riccardo A. Ferrazzoli, Javier Garcia, Shuichi Gunji, Kiyoshi Hayashida, Wataru G. Iwakiri, Svetlana Jorstad, Philip Kaaret, Vladimir Karas, Takao J. Kitaguchi, Jeffery Kolodziejczak, Henric Krawczynski, Luca Latronico, Ioannis Liodakis, Simone Maldera, Alberto Manfreda, Frederic Marin, Andrea P. Marinucci, Alan Marscher, Giorgio Matt, Ikuyuki Mitsuishi, Tsunefumi Mizuno, Michela Negro, Chi-Yung L. Ng, Stephen O'Dell, Nicola Omodei, Chiara Oppedisano, Alessandro G. Papitto, George L. Pavlov, Abel Peirson, Matteo Perri, Melissa Pesce-Rollins, Pierre-Olivier Petrucci, Andrea Possenti, Simonetta D. Puccetti, Brian Ramsey, John Rankin, Ajay J. Ratheesh, Oliver W. Roberts, Roger Romani, Carmelo Sgro, Patrick Slane, Paolo Soffitta, Gloria A. Spandre, Rashid A. Sunyaev, Douglas Swartz, Toru Tamagawa, Fabrizio Tavecchio, Yuzuru F. Tawara, Allyn E. Tennant, Nicholas Thomas, Francesco Tombesi, Alessio Trois, Roberto Turolla, Jacco C. Vink, Martin Weisskopf, Kinwah Wu, Silvia Zane, IXPE Collaboration

Summary: The observations of the accreting X-ray pulsar Vela X-1 show a low polarization degree, consistent with other X-ray pulsars, possibly due to the inverse temperature structure of the neutron star atmosphere.

ASTROPHYSICAL JOURNAL LETTERS (2023)

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Article Astronomy & Astrophysics

X-Ray Polarization of BL Lacertae in Outburst

Abel L. Peirson, Michela Negro, Ioannis Liodakis, Riccardo Middei, Dawoon E. Kim, Alan P. Marscher, Herman L. Marshall, Luigi Pacciani, Roger W. Romani, Kinwah Wu, Alessandro Di Marco, Niccolo Di Lalla, Nicola Omodei, Svetlana G. Jorstad, Ivan Agudo, Pouya M. Kouch, Elina Lindfors, Francisco Jose Aceituno, Maria I. Bernardos, Giacomo Bonnoli, Victor Casanova, Maya Garcia-Comas, Beatriz Agis-Gonzalez, Cesar Husillos, Alessandro Marchini, Alfredo Sota, Carolina Casadio, Juan Escudero, Ioannis Myserlis, Albrecht Sievers, Mark Gurwell, Ramprasad Rao, Ryo Imazawa, Mahito Sasada, Yasushi Fukazawa, Koji S. Kawabata, Makoto Uemura, Tsunefumi Mizuno, Tatsuya Nakaoka, Hiroshi Akitaya, Yeon Cheong, Hyeon-Woo Jeong, Sincheol Kang, Sang-Hyun Kim, Sang-Sung Lee, Emmanouil Angelakis, Alexander Kraus, Nicolo Cibrario, Immacolata Donnarumma, Juri Poutanen, Fabrizio Tavecchio, Lucio A. Antonelli, Matteo Bachetti, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stefano Bianchi, Stephen D. Bongiorno, Raffaella Bonino, Alessandro Brez, Niccolo Bucciantini, Fiamma Capitanio, Simone Castellano, Elisabetta Cavazzuti, Chien-Ting Chen, Stefano Ciprini, Enrico Costa, Alessandra De Rosa, Ettore Del Monte, Laura Di Gesu, Victor Doroshenko, Michal Dovciak, Steven R. Ehlert, Teruaki Enoto, Yuri Evangelista, Sergio Fabiani, Riccardo Ferrazzoli, Javier A. Garcia, Shuichi Gunji, Kiyoshi Hayashida, Jeremy Heyl, Wataru Iwakiri, Philip Kaaret, Vladimir Karas, Takao Kitaguchi, Jeffery J. Kolodziejczak, Henric Krawczynski, Fabio La Monaca, Luca Latronico, Grzegorz Madejski, Simone Maldera, Alberto Manfreda, Frederic Marin, Andrea Marinucci, Francesco Massaro, Giorgio Matt, Ikuyuki Mitsuishi, Fabio Muleri, C. -Y. Ng, Stephen L. O'Dell, Chiara Oppedisano, Alessandro Papitto, George G. Pavlov, Matteo Perri, Melissa Pesce-Rollins, Pierre-Olivier Petrucci, Maura Pilia, Andrea Possenti, Simonetta Puccetti, Brian D. Ramsey, John Rankin, Ajay Ratheesh, Oliver J. Roberts, Carmelo Sgro, Patrick Slane, Paolo Soffitta, Gloria Spandre, Douglas A. Swartz, Toru Tamagawa, Roberto Taverna, Yuzuru Tawara, Allyn F. Tennant, Nicholas E. Thomas, Francesco Tombesi, Alessio Trois, Sergey Tsygankov, Roberto Turolla, Jacco Vink, Martin C. Weisskopf, Fei Xie, Silvia Zane

Summary: We report the first >99% confidence detection of X-ray polarization in BL Lacertae, which was observed during a recent X-ray/gamma-ray outburst. The X-ray data suggest that the IXPE energy band is at the crossover between the low- and high-frequency blazar emission humps. Significant variability and polarization were observed, and the relative contribution from each emission hump was determined. The findings support the dominance of synchrotron self-Compton emission over hadronic emission processes during the observed epochs.

ASTROPHYSICAL JOURNAL LETTERS (2023)

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Article Astronomy & Astrophysics

The IXPE View of GRB 221009A

Michela Negro, Niccolo Di Lalla, Nicola Omodei, Peter Veres, Stefano Silvestri, Alberto Manfreda, Eric Burns, Luca Baldini, Enrico Costa, Steven R. Ehlert, Jamie A. Kennea, Ioannis Liodakis, Herman L. Marshall, Sandro Mereghetti, Riccardo Middei, Fabio Muleri, Stephen L. O'Dell, Oliver J. Roberts, Roger W. Romani, Carmelo Sgro, Masanobu Terashima, Andrea Tiengo, Domenico Viscolo, Alessandro Di Marco, Fabio La Monaca, Luca Latronico, Giorgio Matt, Matteo Perri, Simonetta Puccetti, Juri Poutanen, Ajay Ratheesh, Daniele Rogantini, Patrick Slane, Paolo Soffitta, Elina Lindfors, Kari Nilsson, Anni Kasikov, Alan P. Marscher, Fabrizio Tavecchio, Nicolo Cibrario, Shuichi Gunji, Christian Malacaria, Alessandro Paggi, Yi-Jung Yang, Silvia Zane, Martin C. Weisskopf, Ivan Agudo, Lucio A. Antonelli, Matteo Bachetti, Wayne H. Baumgartner, Ronaldo Bellazzini, Stefano Bianchi, Stephen D. Bongiorno, Raffaella Bonino, Alessandro Brez, Niccolo Bucciantini, Fiamma Capitanio, Simone Castellano, Elisabetta Cavazzuti, Chien-Ting Chen, Stefano Ciprini, Alessandra De Rosa, Ettore Del Monte, Laura Di Gesu, Immacolata Donnarumma, Victor Doroshenko, Michal Dovciak, Teruaki Enoto, Yuri Evangelista, Sergio Fabiani, Riccardo Ferrazzoli, Javier A. Garcia, Kiyoshi Hayashida, Jeremy Heyl, Wataru Iwakiri, Svetlana G. Jorstad, Philip Kaaret, Vladimir Karas, Fabian Kislat, Takao Kitaguchi, Jeffery J. Kolodziejczak, Henric Krawczynski, Simone Maldera, Frederic Marin, Andrea Marinucci, Ikuyuki Mitsuishi, Tsunefumi Mizuno, C. -Y. Ng, Chiara Oppedisano, Alessandro Papitto, George G. Pavlov, Abel L. Peirson, Melissa Pesce-Rollins, Pierre-Olivier Petrucci, Maura Pilia, Andrea Possenti, Brian D. Ramsey, John Rankin, Gloria Spandre, Douglas A. Swartz, Toru Tamagawa, Roberto Taverna, Yuzuru Tawara, Allyn F. Tennant, Nicholas E. Thomas, Francesco Tombesi, Alessio Trois, Sergey S. Tsygankov, Roberto Turolla, Jacco Vink, Kinwah Wu, Fei Xie

Summary: This study presents the observation results of GRB 221009A, including upper limits on the linear polarization degree of both prompt and afterglow emission in the soft X-ray energy band. This research provides constraints on the properties of the GRB emission region, such as the jet opening angle and the viewing angle.

ASTROPHYSICAL JOURNAL LETTERS (2023)

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Article Astronomy & Astrophysics

Simultaneous space and phase resolved X-ray polarimetry of the Crab pulsar and nebula

Niccolo Bucciantini, Riccardo Ferrazzoli, Matteo Bachetti, John Rankin, Niccolo Di Lalla, Carmelo Sgro, Nicola Omodei, Takao Kitaguchi, Tsunefumi Mizuno, Shuichi Gunji, Eri Watanabe, Luca Baldini, Patrick Slane, Martin C. Weisskopf, Roger W. Romani, Andrea Possenti, Herman L. Marshall, Stefano Silvestri, Luigi Pacciani, Michela Negro, Fabio Muleri, Emma de Ona Wilhelmi, Fei Xie, Jeremy Heyl, Melissa Pesce-Rollins, Josephine Wong, Maura Pilia, Ivan Agudo, Lucio A. Antonelli, Wayne H. Baumgartner, Ronaldo Bellazzini, Stefano Bianchi, Stephen D. Bongiorno, Raffaella Bonino, Alessandro Brez, Fiamma Capitanio, Simone Castellano, Elisabetta Cavazzuti, Chien-Ting Chen, Stefano Ciprini, Enrico Costa, Alessandra De Rosa, Ettore Del Monte, Laura Di Gesu, Alessandro Di Marco, Immacolata Donnarumma, Victor Doroshenko, Michal Dovciak, Steven R. Ehlert, Teruaki Enoto, Yuri Evangelista, Sergio Fabiani, Javier A. Garcia, Kiyoshi Hayashida, Wataru Iwakiri, Svetlana G. Jorstad, Philip Kaaret, Vladimir Karas, Fabian Kislat, Jeffery J. Kolodziejczak, Henric Krawczynski, Fabio La Monaca, Luca Latronico, Ioannis Liodakis, Simone Maldera, Alberto Manfreda, Frederic Marin, Andrea Marinucci, Alan P. Marscher, Francesco Massaro, Giorgio Matt, Ikuyuki Mitsuishi, C. -Y. Ng, Stephen L. O'Dell, Chiara Oppedisano, Alessandro Papitto, George G. Pavlov, Abel L. Peirson, Matteo Perri, Pierre-Olivier Petrucci, Juri Poutanen, Simonetta Puccetti, Brian D. Ramsey, Ajay Ratheesh, Oliver J. Roberts, Paolo Soffitta, Gloria Spandre, Doug Swartz, Toru Tamagawa, Fabrizio Tavecchio, Roberto Taverna, Yuzuru Tawara, Allyn F. Tennant, Nicolas E. Thomas, Francesco Tombesi, Alessio Trois, Sergey Tsygankov, Roberto Turolla, Jacco Vink, Kinwah Wu, Silvia Zane

Summary: X-ray polarization measurements of the Crab nebula and pulsar by the IXPE satellite showed a global toroidal magnetic field with large variations in local polarization, indicating a more complex turbulence distribution than expected. The pulsar's emission was found to be unpolarized, except for significant polarization in the core of the main peak. The nebula exhibited a patchy distribution of turbulence, contradicting simple expectations from numerical models.

NATURE ASTRONOMY (2023)

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Article Astronomy & Astrophysics

Discovery of X-ray polarization angle rotation in the jet from blazar Mrk 421

Laura Di Gesu, Herman L. Marshall, Steven R. Ehlert, Dawoon E. Kim, Immacolata Donnarumma, Fabrizio Tavecchio, Ioannis Liodakis, Sebastian Kiehlmann, Ivan Agudo, Svetlana G. Jorstad, Fabio Muleri, Alan P. Marscher, Simonetta Puccetti, Riccardo Middei, Matteo Perri, Luigi Pacciani, Michela Negro, Roger W. Romani, Alessandro Di Marco, Dmitry Blinov, Ioakeim G. Bourbah, Evangelos Kontopodis, Nikos Mandarakas, Stylianos Romanopoulos, Raphael Skalidis, Anna Vervelaki, Carolina Casadio, Juan Escudero, Ioannis Myserlis, Mark A. Gurwell, Ramprasad Rao, Garrett K. Keating, Pouya M. Kouch, Elina Lindfors, Francisco Jose Aceituno, Maria I. Bernardos, Giacomo Bonnoli, Victor Casanova, Maya Garcia-Comas, Beatriz Agis-Gonzalez, Cesar Husillos, Alessandro Marchini, Alfredo Sota, Ryo Imazawa, Mahito Sasada, Yasushi Fukazawa, Koji S. Kawabata, Makoto Uemura, Tsunefumi Mizuno, Tatsuya Nakaoka, Hiroshi Akitaya, Sergey S. Savchenko, Andrey A. Vasilyev, Jose L. Gomez, Lucio A. Antonelli, Thibault Barnouin, Raffaella Bonino, Elisabetta Cavazzuti, Luigi Costamante, Chien-Ting Chen, Nicolo Cibrario, Alessandra De Rosa, Federico Di Pierro, Manel Errando, Philip Kaaret, Vladimir Karas, Henric Krawczynski, Lindsey Lisalda, Grzegorz Madejski, Christian Malacaria, Frederic Marin, Andrea Marinucci, Francesco Massaro, Giorgio Matt, Ikuyuki Mitsuishi, Stephen L. O'Dell, Alessandro Paggi, Abel L. Peirson, Pierre-Olivier Petrucci, Brian D. Ramsey, Allyn F. Tennant, Kinwah Wu, Matteo Bachetti, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stefano Bianchi, Stephen D. Bongiorno, Alessandro Brez, Niccolo Bucciantini, Fiamma Capitanio, Simone Castellano, Stefano Ciprini, Enrico Costa, Ettore Del Monte, Niccolo Di Lalla, Victor Doroshenko, Michal Dovciak, Teruaki Enoto, Yuri Evangelista, Sergio Fabiani, Riccardo Ferrazzoli, Javier A. Garcia, Shuichi Gunji, Kiyoshi Hayashida, Jeremy Heyl, Wataru Iwakiri, Fabian Kislat, Takao Kitaguchi, Jeffery J. Kolodziejczak, Fabio La Monaca, Luca Latronico, Simone Maldera, Alberto Manfreda, C. -Y. Ng, Nicola Omodei, Chiara Oppedisano, Alessandro Papitto, George G. Pavlov, Melissa Pesce-Rollins, Maura Pilia, Andrea Possenti, Juri Poutanen, John Rankin, Ajay Ratheesh, Oliver J. Roberts, Carmelo Sgro, Patrick Slane, Paolo Soffitta, Gloria Spandre, Douglas A. Swartz, Toru Tamagawa, Roberto Taverna, Yuzuru Tawara, Nicholas E. Thomas, Francesco Tombesi, Alessio Trois, Sergey S. Tsygankov, Roberto Turolla, Jacco Vink, Martin C. Weisskopf, Fei Xie, Silvia Zane

Summary: The IXPE satellite observed a shock passing through the jet of Markarian 421 in June 2022, revealing a helical magnetic field. The rotation of the X-ray-polarized radiation over a 5-day period indicated the presence of a helical magnetic structure in the jet. This rotation was unlikely to be produced by a stochastic process and was not observed in data at longer wavelengths.

NATURE ASTRONOMY (2023)

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Article Physics, Nuclear

Development of low-background Cs2ZrCl6 detectors to study raredecays in Zr isotopes

P. Belli, R. Bernabei, F. Cappella, V. Caracciolo, R. Cerulli, A. Incicchitti, M. Laubenstein, A. Leoncini, V. Merlo, S. S. Nagorny, V. V. Nahorna, S. Nisi, P. Wang

Summary: In this study, the chemical purity, crystal radiopurity, scintillating performance, and pulse-shape discrimination ability of Cs2ZrCl6 (CZC) scintillating crystals were systematically investigated. The CZC material exhibited high purity with an overall impurity level below 10 μg/g. The CZC crystals showed low content of radionuclides from U/Th decay chains, but contained cosmogenic Cs-134. The CZC crystals also demonstrated excellent radiopurity and particle discrimination ability as scintillating detectors.

EUROPEAN PHYSICAL JOURNAL A (2023)

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Proceedings Paper Nuclear Science & Technology

Dark Matter with DAMA/LIBRA and its perspectives

R. Bernabei, P. Belli, F. Cappella, V. Caracciolo, R. Cerulli, C. J. Dai, A. d'Angelo, A. Incicchitti, A. Leoncini, X. H. Ma, V. Merlo, F. Montecchia, X. D. Sheng, Z. P. Ye

Summary: This paper summarizes the long-term, model-independent annual modulation effect observed by DAMA in Gran Sasso, and presents the further confirmation of this effect by the DAMA/LIBRA-phase2 setup. The experiment is ongoing and collecting substantial data.

28TH INTERNATIONAL NUCLEAR PHYSICS CONFERENCE, INPC 2022 (2023)

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