Experimental investigation of radiative proton-capture reactions relevant to nucleosynthesis

Postgraduate Thesis uoadl:1321062 571 Read counter

Unit:
Κατεύθυνση Πυρηνική Φυσική και Φυσική Στοιχειωδών Σωματιδίων (ΒΑΣΙΚΗ ΦΥΣΙΚΗ)
Library of the School of Science
Deposit date:
2016-02-03
Year:
2016
Author:
Χαλήλ Άχμεντ
Supervisors info:
Μερτζιμέκης Θεόδωρος Επίκ. Καθηγητής
Original Title:
Experimental investigation of radiative proton-capture reactions relevant to nucleosynthesis
Languages:
English
Translated title:
Πειραματική διερεύνηση αντιδράσεων αρπαγής πρωτονίων με σημασία στη Πυρηνοσύνθεση
Summary:
One of the primary objectives of the field of Nuclear Astrophysics is the study
of the
elemental and isotopic abundances in our solar system. Although a lot of
progress has been
made regarding most of the nuclides, there is a number of neutron-deficient
nuclei, namely
the p nuclei, which cannot be created via the s and r processes, which are
responsible for the
production of the bulk of heavy nuclides. The p nuclides are thought to be
produced as a result
of various combinations of photodisintegrations and nucleon captures, along
with β+decays
and electron captures, in the pre-explosive or explosive phase of massive stars.
To study the vast network of nuclear reactions (over 20'000) occurring in such
stellar environments,
the statistical model of Hauser-Feshbach is employed that requires the knowledge
of experimental cross sections. In the present thesis, the experimental study
of the protoncapture
reactions cross sections natAg(p,γ)108,110Cd, near the astrophysically relevant
energy
window (Gamow), has been attempted at the Tandem Accelerator Laboratory of the
Institute
of Nuclear and Particle Physics (NSCR "Demokritos"). The results are also
compared to
various theoretical models, using the TALYS and EMPIRE codes, providing an
overall good
agreement.
Keywords:
Nucleosynthesis, Cross section, p process, TALYS, Nuclear reactions
Index:
No
Number of index pages:
0
Contains images:
Yes
Number of references:
82
Number of pages:
87
File:
File access is restricted.

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