Binary and ternary breakup of excited projectile-like fragments produced in collisions of 124,136-Xe nuclei with 112,124-Sn targets at E/A = 50 MeV
by McIntosh, Alan Breymann, Ph.D., INDIANA UNIVERSITY, 2010, 222 pages; 3409771

Abstract:

The simultaneous measurement of neutrons and charged particles produced in peripheral and mid-peripheral collisions in a heavy-ion cross-bombardment reaction at intermediate energy, 124,136Xe + 112,124 Sn at E/A = 50 MeV, was performed at the Grand Accélérateur National d’Ions Lourds facility in Caen, France. The charged-particle and neutron detectors used in this measurement, and their subsequent calibration, is described. Analysis of dynamical decay, a common feature of such reactions, has allowed an extraction of the decay timescale as a function of the charge-asymmetry; the correlation between the composition of the lighter fragment, the size of the lighter fragment and the decay orientation is examined. Size-symmetric ternary decay of the excited projectile-like fragment is observed and characterized; the size correlation and the composition of the ternary fragments are compared to statistical model calculations. Analysis of resonant decay of the first excited state of 8Be produced in peripheral and mid-peripheral collisions of 114Cd + 92Mo at E/A = 50 MeV shows a dependence of the relative energy of the two α particles on the alignment of their decay. This phenomenon is interpreted in terms of Coulomb and nuclear tidal forces acting on the decaying 8Be* as well as a modification of the lifetime of the 8Be* through its interaction with the diffuse surface of the nucleus that emitted it.

 
AdviserRomualdo T. de@Souza
SchoolINDIANA UNIVERSITY
SourceDAI/B 71-07, p. , Aug 2010
Source TypeDissertation
SubjectsPhysical chemistry; Nuclear chemistry
Publication Number3409771
Adobe PDF Access the complete dissertation:
 

» Find an electronic copy at your library.
  Use the link below to access a full citation record of this graduate work:
  http://gateway.proquest.com/openurl%3furl_ver=Z39.88-2004%26res_dat=xri:pqdiss%26rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation%26rft_dat=xri:pqdiss:3409771
  If your library subscribes to the ProQuest Dissertations & Theses (PQDT) database, you may be entitled to a free electronic version of this graduate work. If not, you will have the option to purchase one, and access a 24 page preview for free (if available).

About ProQuest Dissertations & Theses
With over 2.3 million records, the ProQuest Dissertations & Theses (PQDT) database is the most comprehensive collection of dissertations and theses in the world. It is the database of record for graduate research.

The database includes citations of graduate works ranging from the first U.S. dissertation, accepted in 1861, to those accepted as recently as last semester. Of the 2.3 million graduate works included in the database, ProQuest offers more than 1.9 million in full text formats. Of those, over 860,000 are available in PDF format. More than 60,000 dissertations and theses are added to the database each year.

If you have questions, please feel free to visit the ProQuest Web site - http://www.proquest.com - or call ProQuest Hotline Customer Support at 1-800-521-3042.