Probing Spin-isospin Excitations in Proton-rich Nuclei Via the 11C(p, N)11N Reaction PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Probing Spin-isospin Excitations in Proton-rich Nuclei Via the 11C(p, N)11N Reaction PDF full book. Access full book title Probing Spin-isospin Excitations in Proton-rich Nuclei Via the 11C(p, N)11N Reaction by Jaclyn Marie Schmitt. Download full books in PDF and EPUB format.
Author: Jaclyn Marie Schmitt Publisher: ISBN: Category : Electronic dissertations Languages : en Pages : 0
Book Description
Understanding nuclear structure and predicting nuclear properties from first principles are major goals of nuclear physics research. Many nuclear models have been created for these purposes, and benchmarking them with new data is critical for their continued development. Exotic nuclei provide fertile testing grounds for nuclear models because nuclear properties evolve and new phenomena emerge as one moves away from stability towards the driplines. In the present work, the 11C(p,n)11N reaction was measured in inverse kinematics at 95 MeV/u at the National Superconducting Cyclotron Laboratory to both provide a benchmark for current models and to lay the groundwork for future experiments. The Gamow-Teller transition strength, B(GT), was extracted from the measured cross section using a well-established proportionality relationship between the charge-exchange cross section and B(GT). The results were B(GT) = 0.18(1)stat(3)sys to the first 1/2- state and B(GT) = 0.18(1)stat(4)sys to the first 3/2- state in 11N. These results are consistent with shell-model calculations after introducing a phenomenological quenching factor and with ab-initio Variational Monte Carlo calculations without any scaling. These results are also consistent with B(GT) values extracted from mirror 11B(n,p) and 11B(t,3He) reactions, assuming isospin symmetry. Additionally, this experiment demonstrates the feasibility of using the (p,n) probe in inverse kinematics to extract B(GT) from transitions to proton-rich unbound nuclei, although improved background suppression will be critical in future experiments.
Author: Jaclyn Marie Schmitt Publisher: ISBN: Category : Electronic dissertations Languages : en Pages : 0
Book Description
Understanding nuclear structure and predicting nuclear properties from first principles are major goals of nuclear physics research. Many nuclear models have been created for these purposes, and benchmarking them with new data is critical for their continued development. Exotic nuclei provide fertile testing grounds for nuclear models because nuclear properties evolve and new phenomena emerge as one moves away from stability towards the driplines. In the present work, the 11C(p,n)11N reaction was measured in inverse kinematics at 95 MeV/u at the National Superconducting Cyclotron Laboratory to both provide a benchmark for current models and to lay the groundwork for future experiments. The Gamow-Teller transition strength, B(GT), was extracted from the measured cross section using a well-established proportionality relationship between the charge-exchange cross section and B(GT). The results were B(GT) = 0.18(1)stat(3)sys to the first 1/2- state and B(GT) = 0.18(1)stat(4)sys to the first 3/2- state in 11N. These results are consistent with shell-model calculations after introducing a phenomenological quenching factor and with ab-initio Variational Monte Carlo calculations without any scaling. These results are also consistent with B(GT) values extracted from mirror 11B(n,p) and 11B(t,3He) reactions, assuming isospin symmetry. Additionally, this experiment demonstrates the feasibility of using the (p,n) probe in inverse kinematics to extract B(GT) from transitions to proton-rich unbound nuclei, although improved background suppression will be critical in future experiments.
Author: C.D. Goodman Publisher: Springer Science & Business Media ISBN: 1461538343 Category : Science Languages : en Pages : 527
Book Description
This volume contains the proceedings of an International Conference on "Spin and Isospin in Nuclear Interactions", which was held in Telluride, Colorado USA, 11-15 March 1991. This was the fifth in a series of conferences held in Telluride every three years since 1979. In attendance at the conference were just under 100 participants, representing a total of 43 institutes from 12 different countries. In keeping with previous Telluride conferences, the role of spin and isospin degrees of freedom in both nuclear structure and nuclear interactions remained an important theme. Topics covered included new results on the spin- and isospin-dependent terms in the free and effective nucleon-nucleon interaction, Gamow-Teller excitations, charge and spin exchange with hadronic probes, and spin measurements with leptonic probes. Recent progress in the development of polarized sources, polarized targets, and po larimetry was also discussed, as were applications to neutrino physics and astrophysics. Whereas earlier Telluride conferences had dealt primarily with nucleon-nucleus inter actions, this meeting included extensive discussions on the role of spin and flavor in particle interactions, and on ways of "bridging the gap" between concepts usually as sociated with particle physics and the domain of more conventional nuclear physics. The conference consisted of morning and evening scientific sessions, leaving the afternoons free for informal discussions, recreation, and enjoyment of the scenic beauty of the Telluride area. In addition to the invited talks, time was allotted for contributed talks on new results.
Author: Fred Petrovich Publisher: Springer Science & Business Media ISBN: 1468447068 Category : Science Languages : en Pages : 651
Book Description
This volume contains the proceedings of the "International Conference on Spin Excitations in Nuclei" held in Telluride, Colo rado, March 25-27, 1982. The motivation for the conference was, in a large part due to the recent development of new variable energy accelerators which produce high quality beams of electrons, protons, and pions that are providing the first precise information on spin excitations in nuclei over a large range of spin and mass. In the past such data had been restricted primarily to light nuclei and were generally resolution limited. Perhaps, the most exciting new result has been the clear observation of the elusive spin-dipole strength (Gamow Teller and Ml) in medium and heavy mass nuclei through the use of the (p,n) and (p,p') reactions at or near zero degrees with 100-200 MeV incident protons. Energy dependence in the isovector parts of the nucleon-nucleon interaction make the 100-200 MeV energy region particularly appropriate for such studies. The clean data from (e,e'), ('IT,'IT'), (p,p'), and (p,n) on high spin "stretched" states which have particularly simple structure has also been quite impor tant. The recent results contain important new information on the nature of the spin dependent forces in nuclei. These in turn are inherently related to the properties of the nuclear mesonic field and the underlying quantum chromodynamics.
Author: Jaclyn Marie Schmitt
Author: Jaclyn Marie Schmitt
Author: C.D. Goodman
Author: Richard Madey
Author: Fred Petrovich
Author: L. Nilsson
Author: J. (Niels Bohr Institutet) Bang
Author: Samuel Israel Lipschutz
Author: C. (Niels Bohr Institutet) Gaarde
Author: F. Palumbo
Author: Brandon Alexander Elman