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Mr. Mihail Doloris Mirea

Dr

Researcher - INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA SI INGINERIE NUCLEARA " HORIA HULUBEI " - IFIN - HH

Researcher

Web of Science ResearcherID: C-2297-2011

Expertise & keywords

Development of models and methods for computation of the nuclear matrix elements involved in the study of double-beta decay Call name: Exploratory Research Projects - PCE-2011 call
PN-II-ID-PCE-2011-3-0318 2012 - 2016

Role in this project: Key expert

Coordinating institution: Fundatia Horia Hulubei

Project partners: Fundatia Horia Hulubei (RO)

Affiliation: Fundatia Horia Hulubei (RO)

Project website: http://www.infim.ro/hhf/projects.html

Abstract:

The project proposes to develop new nuclear structure models and high performance computing codes based on the Shell Model to provide a reliable description of the nuclear matrix elements (NMEs) involved in the double-beta (ββ) decays. The NMEs are essential to improve the knowledge of the absolute neutrino masses, and to investigate the possibility of determining the leading mechanisms for the neutrinoless double beta (0νββ) decay mode. The specific ojectives of this project include: i)establish reliable effective shell model NN interactions that can adequately reproduce the spectroscopic properties of the nuclei in the mass-regions of the main ββ decay emitters; ii)develop an efficient code to calculate the two-body matrix elements of the 0νββ-decay operator, including high orders effects in the nucleon currents, short-range correlations and other nucleon-dressing effects; iii)estimate the effects of enlarging the size of the shell model spaces that may break general symmetries; iv)predict new limits and uncertainties for the effective 0νββ neutrino mass assuming a standard 0νββ decay half-life of 10^26 years; v)derive explicit expressions for the transition amplitudes of other possible 0νββ decay mechanisms and investigate strength of their contributions; vi) disseminate the results to the experimentalists, which are using theoretical NMEs in the planning of their ββ decay experiments.

STRONG DISSIPATIVE REGIME IN THE QUANTUM MECHANICS OF NUCLEAR REACTIONS Call name: Exploratory Research Projects - PCE-2011 call
PN-II-ID-PCE-2011-3-0068 2012 - 2016

Role in this project: Project coordinator

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU FIZICA SI INGINERIE NUCLEARA HORIA HULUBEI

Project partners: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU FIZICA SI INGINERIE NUCLEARA HORIA HULUBEI (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU FIZICA SI INGINERIE NUCLEARA HORIA HULUBEI (RO)

Project website: http://www.theory.nipne.ro/~mirea

Abstract:

WE WILL FOCUSS ON A STRONG DISSIPATIVE REGIME BY DEVELOPING QUANTUM MODEL WITH APPLICATION IN NUCLEAR PHYISCS. NEW METHODS FOR THE TREATMENT OF NUCLEAR REACTIONS WILL BE DEVELOPED BY CALCULATING THE DEFORMATION ENERGY SURFACE IN THE CONFIGURATION SPACE, TOGETHER WITH THE EFFECTIVE MASS OF THE SYSTEM AND THE DISSIPATION ENERGY. DYNAMICAL METHODS THAT ARE BAZED ON THE MINIMAL ACTION FUNCTIONAL PRIME PRINCIPLE OR THE SOLUTIONS OF THE EULER-LAGRANGE EQUATIONS WILL BE USED. THE OPTIMUM PATH IN THE CONFIGURATION SPACE FOR SERVGERAL TYPES OF NUCLEAR REACTIONS WILL BE DEDUCED, NEW APPROACHES WILL BE DEVELOPED FOR STRONG DISSIPATIVE REGIMES AND A SMALL NUMBER OF CONSTITUENT PARTICLE,

N-body correlations in exotic nuclear systems Call name: Exploratory Research Projects - PCE-2011 call
PN-II-ID-PCE-2011-3-0092 2011 - 2016

Role in this project: Key expert

Coordinating institution: Institutul National de Cercetare-Dezvoltare pentru Fizica si Inginerie Nucleara "Horia Hulubei"

Project partners: Institutul National de Cercetare-Dezvoltare pentru Fizica si Inginerie Nucleara "Horia Hulubei" (RO)

Affiliation: Institutul National de Cercetare-Dezvoltare pentru Fizica si Inginerie Nucleara "Horia Hulubei" (RO)

Project website: http://www.theory.nipne.ro/index.php/research-projects

Abstract:

The project is aimed to investigate the role of few and many-body correlations in exotic nuclear systems like proton/neutron rich or superheavy nuclei, α-clustered states, hyper-deformed configurations, and star matter. (1) We shall investigate the influence of α-clustering configurations on electromagnetic and α-transitions in heavy and superheavy nuclei. A special attention will be devoted to the microscopic explanation of strong E1 transitions from recently found exotic non-natural parity states in 212-Po. We shall use a statistical approach to investigate massive clusters, creating the so-called pasta phase in stellar matter, and their importance in the star cooling process. (2) Pairing correlations have a crucial role in the fission process, creating neutron rich fragments. We will solve pairing equations in fissioning systems, by using an effective pairing potential, derived from the realistic Paris interaction within the G-matrix approach. (3) Most of exotic weakly bound proton or neutron rich nuclei are two-particle systems, coupled to a relatively stable core. We shall describe the dynamics of such three body systems within the coupled channel formalism, by using as an initial condition the correlated two-body wave function on the nuclear surface. The sensitivity of the angular distribution on the pairing gap and mean field parameters for two-particle (proton and neutron) emitters will be investigated.

FILE DESCRIPTION	DOCUMENT
List of research grants as project coordinator or partner team leader	Download (56.57 kb) 21/10/2019
Significant R&D projects for enterprises, as project manager
R&D activities in enterprises
Peer-review activity for international programs/projects