Proiecte PNCDI 3

Thu, 25 Apr 2024

Lista de proiecte » De la o metoda promitatoare la o intelegere deplina a reactiilor induse de deuteroni

De la o metoda promitatoare la o intelegere deplina a reactiilor induse de deuteroni
www.nipne.ro/proiecte/pn3/60-proiecte.html

Acronim: Protodeep
Autoritatea contractanta: UEFISCDI
Numar / Data contract: PN-III-ID-PCE-2021-0642 /
Program: PN-III-P4 Cercetare fundamentala si de frontiera
Director proiect: Marilena Avrigeanu
Parteneri:
Data incepere / finalizare proiect: 2022-06-01 / 2025-02-28
Valoarea proiectului: 1200000 RON
Rezumat: Stadiul reactiilor induse de deuteroni evidentiat de Cowen et al. (Rev.Mod.Phys. 93, 15002, 2021) evidentiaza descrierea IFIN-HH corecta prin atentia acordata breakup-ului (BU) si reactiilor directe (DR) ale deuteronilor, omise anterior, si nivelul teoretic pur ale abordarilor microscopice actuale. Mai mult, in timp ce studii recente au stabilit fie ca aceste calcule depasesc posibilitatile actuale, sau au folosit un simplu fit al datelor, metoda noastra "promitatoare" a permis deja o descriere buna a datelor de activare a deuteronilor pentru izotopii stabili ai Al, Cr, Mn, Fe, Co, Ni, Cu, Zr,si Nb. Aprofundarea analizei procesului BU inelastic este intentionata in continuare prin teoria "eikonal" extinsa si a canalelor cuplate discretizate in continuum (CDCC) la energii superioare parametrizarilor disponibile. Este vizata si o descriere globala a proceselor BU si DR, pe langa mecanismele de emisie la preechilbru (PE) si nucleu compus (CN), urmata de implicarea proceselor BU+DR+PE+CN in cadrul unor coduri de calcul actualizate si a unei utilizari unitare a paramtrilor initiali.

Obiective: Overall, this proposal aims, in addition to previous results and concurring the actual trend in the field, at further improvements of the theoretical description of deuteron interactions with nuclei that could be validated only by suitable description of experimental data. Actually, even the total reaction cross sections of deuterons are less accurately described since, unlike the nucleon case, there are no global optical model potentials (OMP) able to describe sufficiently well the scattering data over a wide range of nuclei and energies. Therefore a simultaneous analysis of the deuteron elastic scattering and induced activation appears essential for a consistent input of nuclear model assessment. In fact, a prime interest for the deuteron OMP parameters is motivated by their further use within estimation of most of the deuteron reaction cross sections. Then, usually neglected or very poorly taken into account, the stripping (d,p) and (d,n) and the pick-up (d,t) reaction description is still an open question. On the whole, the present project intends a deeper understanding of all above-mentioned problems of deuteron interactions, all together and consistently with better-known PE+CN. However, while the associated theoretical models for stripping, pick-up, PE and CN are already settled, increased attention should concern the BU-mechanism theoretical description. The recently increased interest on the theoretical analysis of BU components may lead eventually to the refinement of the deuteron BU parametrization and increased accuracy of the deuteron activation cross section calculations. Nevertheless, the improvement of the deuteron BU description requires, beyond its own data basis increase, also complementary analyses of (d,px) and (n,x), as well as (d,nx) and (p,x) reaction cross sections for the same target nucleus, within corresponding incident-energy ranges. Following the eventual achievements of this project as well as in order to additionally check them, setting up of well-documented proposals for further measurements is also planne. There are concerned in this respect, in addition to the current measurements, forthcoming experiments at GANIL/SPIRAL2.

ETAPELE PROIECTULUI SI DATELE DE PREDARE
1. PCE-2021 Project Proposal as generated by UDIManager; https://uefiscdi-direct.ro/pce2021-public , Project No. 148 (2021-07-06) REZULTATE / REZUMAT
2. OpenPosition_MsC-PhD_ASC_PCE-2021-0642 (2022-05-27) REZULTATE / REZUMAT
3. Deuteron-BU model improvement and consistent analysis of reaction mechanisms within deuteron interactions with ^98,100Mo stable isotopes at energies up to 50 MeV (2022-12-31) REZULTATE / REZUMAT
4. Deuteron-BU model improvement and consistent analysis of reaction mechanisms within deuteron interactions with ^95-97Mo stable isotopes at energies up to 50 MeV (2023-12-31) REZULTATE / REZUMAT
5. Comparative model analysis of deuteron-induced direct reaction excitation functions on ^92,94,natMo at incident energies up to 50 MeV (2025-02-28)

REZULTATE
ARTICOLE PUBLICATE
ECHIPA DE CERCETARE

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