H2020Индивидуална стипендия2021–2023

FiBRa · Fission Barrier of neutron rich Ra isotopes for r-process investigation

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2021-04-01 → 2023-03-31
Финансиране от ЕС: 166 320 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Височината на фисионната бариера при богати на неутрони изотопи на радия се измерва чрез експерименти в CERN. Тези данни помагат да се разбере как се създават тежките елементи във Вселената, например при сблъсък на неутронни звезди.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Fission Barrier of neutron rich Ra isotopes for r-process investigation

The FiBRa project aims at directly measuring the Fission Barrier height along the neutron-rich side of the Radium Isotopic chains. The action moves from the fact that the region between Thallium and Radium is a poorly-known region, which now can be accessed by exploiting the radioactive ion beam accelerated at the HIE-ISOLDE facility (CERN). Such a region, and in particular the neutron-rich side of these elements, can be a good bench test for the fission barrier models where they tend to return conflicting fission barrier height. Indeed, to date, fission barrier models have been mainly developed mainly testing them in the vicinity of the valley of stability and on the neutron-deficient side of the nuclide chart. The action aims at performing transfer-induced fission experiments to shed light on such a region, using radioactive ion beams from HIE-ISOLDE and the active target detector ACTAR TPC as a detection device. Eventually, the determination of the goodness of actual fission barrier models can also shed light on the astrophysical location of the r-process. The r-process is one of the two main nucleosynthesis mechanics for the production of elements heavier than iron. Despite the main reaction mechanism being well established, its astrophysical location is not clear. To date, the main two candidate sites are the Neutron Star Merger and Core Collapse SuperNovae. In the former, which is the favorite site of the astrophysical community, the fission of nuclei around mass 230 is relevant, the fission barrier models thus are crucial. As a consequence, new experimental data that can stress the present fission barrier models are needed. The objectives of the FiiBRa action can be summarized as: 1) Measurement of the Fission Barrier height in the Tl-Ra region of the nuclide chart, mainly along the neutron-rich side of the Ra isotopic chain 2) Comparison with the state-of-the-art Fission Barrier models to add new constraints that could be relevant for the astrophysical location of the r-process site 3) Eventually, the FiBRa action aims at offering a challenging learning process for the researcher, that will work in a frontier physics case and with advanced nuclear detectors, developing and boosting the researcher's career in order to provide a solid base for his future in the academic sector.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

A full training program on radioactive ion beam experiments with the gaseous active target will be pursued. In particular, it aims to investigate with the ACTAR-TPC detector the transfer induced fission of neutron-rich nuclei, to put new constraints on the nucleosynthesis rapid capture process (r-process). This will be possible thanks to high energy and intensity radioactive ion beams produced at the HIE-ISOLDE facility, in particular accessing the poorly-known region between Tl and Ra isotopes. The goal of this action is to investigate n-induced fission probability as a function of the excitation energy of the nucleus, with respect to the n-capture probability.This action starts with the already approved experimental campaign neutron-deficient isotopes between Tl and Ra: such a campaign will be used as a training field on both active target technology, transfer induced reactions, and fission of heavy nuclei. The full training will be reached developing an independent physics case on neutron-rich isotopes, more suitable for r-process investigation. The chosen bench-test is the 230Ra(d,p)231Ra reaction. I will be in charge of the proposal preparation, the experimental campaign, the data analysis, and publication. Such an experiment aims to discriminate between fission barrier models, in order to provide new constraints that can affect the astrophysical location of the r-process. Only the most recent developments at RIB facilities will allow performing the experiments here proposed. This will be done along with a two years action at KU Leuven, under the guidance of Prof. Riccardo Raabe, an expert in the active target technology and transfer induced studies. This action will allow me to obtain a high level of specialization that will be suitable for permanent positions at radioactive ion beam facilities, or at research institutes involved in these topics.

Оригинален текст от CORDIS (на английски).

Участници

KATHOLIEKE UNIVERSITEIT LEUVEN · LeuvenКоординаторБелгия