Exotic nuclei, atoms and mezoscopic systems  Page description

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Details of project

 
Identifier
37991
Type K
Principal investigator Vertse, Tamás
Title in Hungarian Egzotikus magok, atomok és mezoszkopikus rendszerek
Title in English Exotic nuclei, atoms and mezoscopic systems
Panel Physics 1
Department or equivalent Theoretical nuclear physics research group (HUN-REN Institute for Nuclear Research)
Participants Kruppa, András Tibor
Pál, Károly Ferenc
Révai, János
Varga, Kálmán
Végh, László
Starting date 2002-01-01
Closing date 2006-12-31
Funding (in million HUF) 14.510
FTE (full time equivalent) 0.00
state closed project





 

Final report

 
Results in Hungarian
Több új közelítő eljárást vezettünk be, amelyekkel egzotikus atommagok és atomok, valamint mezoszkopikus rendszerek elméleti leírását a korábban ismert módszereknél hatékonyabban lehet elvégezni. Ilyen új módszer - a Lagrange-bázisos rendszer, ahol az atomok számával arányos a számitási munka [12,22], - a hiszterézises optimalizálás [4,18,19], - a komplex energiájó kvázirészecskék használata atommagok BCS leírásában [17]. Az általánosított Berggren-reprezentációval a virtuális állapot hatását tudtuk egzotikus atommagokban szeparálni [7,8,14,15]. Az antiprotonos heliumban elsőízben írtuk le realisztikusan az e-befogást, és számoltunk parciális szélességeket [21]. Nagy csatornaszám esetére is alkalmazható formalizmust vezettünk be triaxiális atommagokból való protonkibocsátás számolására [3,9]. A komplex skálázás továbbfejlesztésével elértük, hogy négyzetesen integrálható bázison tudunk szórásszámítást végezni [24]. A héjkorrekció alkalmazásával mikroszkopikus modellszámolásokkal határoztuk meg a makroszkopikus cseppmodell energiatagjainak izoskalár és izovektor parametrizálását [20]. Módszereink működését konkrét rendszerekre való alkalmazásokkal mutattuk be. Összefoglaltuk a 3-5 töltött részecskéből álló kvantummechnikai rendszerek stabilitására vonatkozó ismereteinket [13].
Results in English
New methods have been developed in this project in order to carry out theoretical description of exotic nuclei, atoms and mesoscopic systems more efficiently than by using the previously known methods. These new methods are the following: - the Lagrange functions method, where the computational work is proportional with the number of atoms [12,22], - the hysteric optimization [4,18,19], - the use of complex-energy qusiparticles in the BCS desciption of nuclei [17]. The generalized Berggren representation allows us to study the role of virtual state in exotic nuclei separately [7,8,14,15]. In the case of antiprotonic helium the e-capture was described first time in a realistic way and partial widths have been determined [21]. A new formalism to calculate proton emission from triaxially deformed nuclei has been invented. applicable even when the number of coupled channels is very large [3,9]. The complex scaling method was developed further for the description of scattering states by using square integrable basis [24]. The isoscalar and the isovector parametrization of the energy terms of the macroscopic liquid drop modell have been studied by applying shell correction to the binding energies calculated microscopically.[20]. The power of the new methods has been demonstrated on different physical systems. Our knowledge on the stability of quantum mechanical system of 3-5 charged particles reviewed [13]
Full text http://real.mtak.hu/430/
Decision
Yes





 

List of publications

 
Reinhard P-G; Bender M; Nazarewicz W; Vertse T: From Finite Nuclei to the Nuclear Liquid Drop: Leptodermous Expansion Based on the Self-consistent Mean-Field Theory, Phys. Rev. C 73:014309, (1-11),, 2006
Pál KF: Hysteric optimization for traveling salesman problem, Physica A329: 287-297, 2003
Pál KF: Hysteric optimization, In: Hartman AK, Rieger H (ed.) New optimization algorithms in physics, H. Willey-VCH Verlag GmbH and Co. 2004.pp.205-226, 2004
Révai J; Kruppa AT: Auger width of metastable states in antprotonic helium II, in Motovilov AK, Pencov FM (ed.) Selected topics in Theor Phys and Astrophys, Dubna: JINR Press, 2004. pp.51-56, 2004
Id Betan R: Liotta RJ: Sandulescu N; Vertse T: Two-particle resonances in the complex energy plane, Few-Body Systems 34: 51-56, 2004
Kruppa AT; Nazarewicz W: Nilson-orbit and weak-coupling model: non-axial deformation, In: PROCON2003 Conf, Legnaro: 2003 AIP Conf Proc 681 pp. 61-70, 2003
Krolas W;... Kruppa AT; Nazarewicz W; Vertse T: First Observation of Excited States in 140-Dy, In: PROCON2003 Conf Legnaro: 2003 pp. 183-186 AIP Conf Proc 681, 2003
Rykaczewski KP;...Kruppa AT; Nazarewicz W; Semmes P; Vertse T: Fine structure on one-proton emission studied at Oak Ridge, In: PROCON2003 Conf Legnaro: 2003 pp. 11-17 AIP Conf Proc 681, 2003
Id Betan R: Liotta RJ: Sandulescu N; Vertse T: A shell model representation with antibound states, Phys Letters B584: 48-57, 2004
Varga K; Zhang Z; Pantelides ST: Lagrange Functions: A Family of Powerful Basis Sets for Real_Space Order-N Electronic Structure Calculations, Phys Rev Letters 93: 176403 1-4, 2004
Gurvitz SA; Semmes PB; Nazarewicz W; Vertse T: Modified two-potential approach to tunneling problems, Phys Rev A69: 042705 1-8, 2004
Kruppa AT; Nazarewicz W: Gamow and R-matrix approach to proton emitting nuclei, Phys Rev C69: 054311 1-11, 2004
Mo Y.; Varga K; Kaxiras E; Zhang Z: Kinetic Pathway fo the Formation of Fe Nanowires Stepped Cu(111) Surfaces, Physical Review Letters 94: 155503 1-4, 2005
Id Betan R; Liotta RJ; Sandulescu N; Vertse T; Wyss R: Complex shell model representation including antibound states, Phys Rev C72: 054322 1-16, 2005
Id Betan R; Liotta RJ; Sandulescu N; Vertse T: Description of the continuum part of the spectrum by using the complex energy plane, J. Phys G: Nucl. Part. Phys. 31: S1329-S1336, 2005
Varga K; Pantelides ST: Lagrange-function approach to real-space order-N electronic structure calculations, Physica Status Solidi. B 243: 1110-1120,, 2006
Armour EAG; Richard J-M; Varga K.: Stability of few-charge systems in quantum mechanics, Physics Reports 413: 1-90, 2005
Pál KF: Hysteric optimization, faster and simpler, Physica A360: 525-533, 2006
Pál KF: Hysteric optimization for the Sherrington-Kirkpatrick spin glass, Physica A 367: 261-271, 2006
Révai J; Shevchenko N: Capture of slow antiprotons by helium atoms, Eur. Phys J. D37: 83-92, 2006
Id Betan; Sandulescu N; Vertse T:: Quasiparticle resonances in the BCS approach,, Nucl. Phys. A 771: 93-102, 2006
Hetesi Zs; Vegh L:: A definition for fine tuning in analogy to the chaos, Acta Phys. Polonica 38: 247-250, 2007, 2007
Kruppa AT; Suzuki R; Kato K:: Scattering amplitude without explicit enforcement of boundary condition, Phys. Rev. C elfogadva, 2007
Pieper SC; Varga K; Viringa RB: Quantum Monte Carlo calculations of A=9,10 nuclei, Phys Rev C 93: 044310 1-4, 2002




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