ChETEC-INFRA: research infrastructures for Nuclear Astrophysics
A new European H2020 project where INFN takes on a central role
ChETEC-INFRA (Chemical Elements as Tracers of the Evolution of the Cosmos - Infrastructure) is a project recently funded by the EU with a four-year budget of 5 million euros, within Horizon 2020. INFN and other Italian universities hold a central role in the initiative that is located at the frontier of nuclear astrophysics that studies the origin of chemical elements: from the Big Bang, to stellar combustion up to neutron and proton capture processes for the formation of heavier elements.
ChETEC-INFRA constitutes a network between three types of infrastructures which, together, will provide the necessary tools for this research: the astro-nuclear laboratories that provide cross section data of nuclear reactions, the supercomputers that perform calculations of stellar structure and nucleosynthesis, and telescopes and mass spectrometers that collect data on the abundance of elements and isotopes.
ChETEC-INFRA will overcome existing barriers to the advancement of these studies: in particular, access to nuclear astrophysics research infrastructures will be unified using a new integrated web portal; targets and detectors for nuclear reactions, software tools for open-source nucleosynthesis and new three-dimensional models for the analysis of stellar spectra will be developed.
ChETEC-INFRA will provide the community with the tools needed to address key issues on solar fusion, nucleosynthesis by neutron capture and explosive stellar processes. In a combined approach designed to facilitate and increase accessibility, synergies and training, the large amount of transnational access provided will make it possible projects that exploit at least two different types of infrastructure.
Within ChETEC-INFRA, the data will be archived and cataloged for long-term sustainability beyond the end of the project and for their usability in open access.
ChETEC-INFRA involves 32 institutions from 18 European nations and is networked with nuclear astrophysics communities in the United States, China and Japan.
INFN contribution to the project, through its own structures and employees and associates, is broad and widespread.
In particular, INFN will be responsible for the development, construction and testing of both solid and gaseous innovative targets, which will allow the study of nuclear reactions of astrophysical interest at very low energies. Furthermore, it will deal with the development of innovative neutron detectors, such as composite scintillators and new plastic materials, for gamma/neutron discrimination, keeping in touch with industrial partners.
INFN will coordinate the validation activities of the cross sections of the most important reactions for nuclear astrophysics such as those involving 12C and 22Ne, possibly measuring the same reactions with complementary methods, and more generally it will establish and maintain an open-access database of cross sections for a large number of reactions of astrophysical interest.
Finally, INFN will play an important role both in the dissemination of research results with particular reference to funding institutions and industries, and in the training of the next generations of researchers in the field of nuclear astrophysics, through schools and masterclasses.
FROM THE GRAN SASSO LABORATORIES TO THE BIG BANG, AND BACK
The LUNA experiment sheds light on the density of matter that makes up everything we know of in the universe
There is a key process – in the sequence of reactions known as Big Bang Nucleosynthesis – that led to the production of the lightest chemical elements in the first moments of life of our universe: it is the reaction by which a proton and a nucleus of deuterium fuse together to form the stable isotope of helium, Helium-3.
This reaction has now been studied with unprecedented precision at LUNA (Laboratory for Underground Nuclear Astrophysics), at the Gran Sasso National Laboratories of the INFN. Thanks to this study, it has been possible to refine the calculations of the primordial nucleosynthesis and to obtain an accurate determination of the density of ordinary (or “baryonic”) matter, which makes up everything we know of, including living species.
The results of the measurement conducted by the LUNA Collaboration, and their cosmological impact were published today, 12/11/2020 in the journal Nature, https://www.nature.com/articles/s41586-020-2878-4
In this particular study we have benefited from the precious contribution of the theoretical group of astroparticle physics and theoretical cosmology of the Federico II University of Naples, to arrive at an accurate determination of the baryon density. An important contribution to the description of nuclear interaction was also provided by the theoretical nuclear physics group of the University of Pisa.
The LUNA experiment will continue its scientific activity over the next decade with the LUNA-MV project, focused on the study of key reactions important to understand the chemical composition of the universe and the nucleosynthesis of the heavy elements
LUNA is an international collaboration of about 50 scientists from Italy, Germany, Hungary and the United Kingdom. The list of collaborating institutions includes: the National Laboratories of Gran Sasso, the INFN sections and the Universities of Bari, Genoa, Milano Statale, Naples Federico II, Padua, Rome La Sapienza, Turin, and the INAF Observatory of Teramo (Italy); the Helmholtz-Zentrum Dresden-Rossendorf (Germany), the ATOMKI in Debrecen and the Konkoly Observatory of Budapest (Hungary); and the School of Physics and Astronomy of the University of Edinburgh (United Kingdom).
DOE, Brookhaven Lab, and Jefferson Lab Launch Electron Ion Collider Project
On 18 September the event: "Electron-Ion Collider Project Launch" was held in the presence, among others, of the U.S. Department of Energy (DOE) Under Secretary for Science Paul Dabbar, leaders of Brookhaven National Laboratory (Brookhaven Lab) and Thomas Jefferson National Accelerator Facility (Jefferson Lab). Fabiola Gianotti, CERN Director-General, also intervened, testifying to the interest and support of the European scientific community for the project, which aims to create the 3.9-km circumference collider for the study of the properties and dynamics of quarks and gluons.
More details on the event can be found at the two links below:
- link 1
- link 2
VIP experiment at Laboratori Nazionali del Gran Sasso challenges Penrose theory
A new record was achieved in the study of the gravity-related wave function collapse model, which was proposed by Lajos Diósi and Roger Penrose (DP model) in order to solve the measurement problem. The experimental research was performed in the framework of the VIP collaboration, having Catalina Curceanu as Spokesperson and Kristian Piscicchia as INFN responsible.
The experiment looked for signal of a characteristic spontaneous radiation emission, which is predicted by the model. The measurement was performed at the underground Gran Sasso National Laboratory exploiting a High Purity Germanium detector. The results were recently published in the Nature Physics research article "Underground test of gravity-related wave function collapse". The experimental sensitivity was, for the first time, such as to falsify the model, at least in the present version. The measured upper limit on the spontaneous ration rate is orders of magnitude less then the theory expectation.
The group is collaborating with expert theoreticians in this sector (among which Penrose and Diósi themselves) to the development of a new “gravity-related collapse” model, and already works to the design and realization of an even more sensitive experiment, in order to test other elusive collapse models.
The work published in Nature Physics was widespread disseminated:
- link 1
- link 2
- link 3
- link 4
Still from interactive video installation, courtesy of camerAnebbia
Science3IP – the Science trip to the Third Sector Organizations, Institutions and Politics
Science3IP – the Science trip to the Third Sector Organizations, Institutions and Politics is an innovative scientific outreach program able to directly engage the deputies (or members) of the Assemblea Regionale Siciliana (ARS) and more than 60 no‐profit Organizations thus establishing, for the first time, a direct partnership between Research, the Community, the no‐profit Organizations and the regional Political‐Institutional system.
The project ‐ although not a winner of the “Physics Involving People” call – has been deemed worthy to be financed with extra‐Call funds since its objectives and the way to involve the target audience have been evaluated innovative.
More details at this link.
In the pictures, some participatory workshop carried out at “Palazzo dei Normanni”, i.e. the site of the Sicilian regional Parliament, between non-profit organizations and the regional deputies on topics of Agriculture, Welfare and social inclusion.