13-17 June 2016
Niigata University (Ikarashi Campus)
Asia/Tokyo timezone

Relevant cross section measurements to the astrophysical p-process nuclei

15 Jun 2016, 14:00
10m
Library Hall, Central Library (Niigata University (Ikarashi Campus))

Library Hall, Central Library

Niigata University (Ikarashi Campus)

Central Library, Niigata University (Ikarashi Campus), 8050 Ikarashi 2-nocho, Nishi-ku Niigata City, 950-2181, Japan
Short Talk Students1

Speaker

Dr Andreea Oprea (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH))

Description

A.Oprea1, T. Glodariu1,2, D. Filipescu1,2, I. Gheorghe1,2, I. Cata-Danil1, N. Florea1, D. Bucurescu1, D.G. Ghita1, N. Marginean1, R. Marginean1, C. Mihai1, A. Negret1, A. Olacel1, S. Pascu1, R. Suvaila1, L. Stroe1, S. Toma1,3 and N.V. Zamfir1 1 Department of Nuclear Physics, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)Magurele, Romania 2 Extreme Light Infrastructure - Nuclear Physics (ELI - NP) / IFIN – HH, Magurele, Romania 3 University Politechnica of Bucharest, Bucharest, Romania For an accurate description of the p-process nucleosynthesis a large reaction database involving several hundreds to thousands of reaction rates is necessary. Unfortunately, there is a considerably lack of experimental data on the relevant cross sections in the p-process energy range, due to the fact that most γ-induced reactions are very difficult to measure directly [1]. To overcome this difficulty, the charged particle induced reaction cross sections are measured and their inverse photodisintegration reaction cross section are calculated. Alpha particle induced reactions play a significant role in the study of nuclear structure, nuclear reactions and astrophysics. Reaction rate estimates within the framework of the Hauser-Feshbach statistical model must be further tested in order to validate the existing alpha-nucleus optical model potentials, especially at low energies, far bellow the Coulomb barrier. Experimental data for these reactions in the astrophysical relevant energy range, near the Gamow window, have been measured for different p-nuclei. The cross sections were measured by means of the activation method using an alpha beam delivered by the Bucharest IFIN-HH Tandem 9MV accelerator. The induced activities were measured in close-to-detection geometry using two large volume HPGe detectors in a low background passive shielding. The experimental results were compared with theoretical predictions obtained in the framework of the statistical model. Extended experimental cross sectiondata on p-nuclei give a higherreliability in using global optical model potential parametrization [2]. [1] H. Utsunomiya et al., Nucl. Phys. A777, 459 (2006). [2] M. Avrigeanu et al., Phys. Rev. C 91, 064611 (2115).

Primary author

Dr Andreea Oprea (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH))

Co-authors

Dr Adina Olacel (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Dr Alexandru Negret (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Ms Alina Ionescu (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Ms Andreea Mitu (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Ms Andreea Serban (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Mr Andrei Turturica (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Dr Constantin Mihai (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Mr Cristian Costache (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Dr Cristina Nita (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Dr Dan Ghita (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Dr Dorel Bucurescu (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Mr Lucian Stan (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Mr Lucian Stroe (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Mr Marian Boromiza (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Dr Nicolae Marginean (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Dr Nicoleta Florea (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Mr Radu Emanuel Mihai (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Mrs Raluca Marginean (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Mr Rares Suvaila (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Mr Sebastian Toma (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)) Dr Sorin Pascu (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH))

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