Seminars

Wednesday, Sep 19 at 4:10 PM
1200 FRIB Laboratory
Kaoru Yokoya, High Energy Accelerator Research Organization, KEK
ILC Status

Abstract:  Studies on electron-positron linear colliders started in mid 1980s in various labs world-wide. They were unified in the name of ILC (International Linear Collider) in 2004 and a new organization GDE was formed immediately. The GDE published the TDR (Technical Design Report) in 2013 and passed the work to the LCC (Linear Collider Collaboration). Japanese scientists raised their hands to build it in Japan and Japanese Government has been discussing about its approval since the TDR publication. Some sort of decision by the government will be made by the end of this year. In this seminar, design features of the ILC with technology issues will be explained together with the recent movements of the MEXT (Ministry of Education and Science) and the Science Council of Japan.

Thursday, Sep 20 at 11:00 AM
1200 FRIB Laboratory
Mark Spieker, NSCL
High-resolution (p,t) study of low-spin states in 240Pu: Octupole excitation, alpha clustering, and other structure features
Wednesday, Sep 26 at 4:10 PM
1200 FRIB Laboratory
Akaa Ayangeakaa, United States Naval Academy
Shape coexistence and the search for neutrinoless double-beta decay: A case study of 72,76Ge

Abstract:  Observation of neutrinoless double-beta decay would both demonstrate the Majorana nature of the neutrino and provide experimental access to its absolute mass scale. Over the last decade, wavefunction contributions for leading neutrinoless double-beta decay candidates have been probed in a campaign of experiments utilizing transfer reactions to determine nucleon occupancies in a consistent way. While these studies have provided a great deal of information for comparison with theory, especially on contributions to the nuclear wavefunctions from competing orbitals, they lack sensitivity to the collective and shape degrees of freedom which have been shown to be an integral part of the structure of parent-daughter nuclei relevant to neutrinoless double-beta decay. In this talk, I will present results of highprecision Coulomb excitation measurements aimed at studying the various collective-shape degrees of freedom and associated phenomena. The talk will focus primarily on the electromagnetic properties of low-lying states in 72,76Ge which were investigated via multistep Coulomb excitation using the advanced gamma-ray tracking array, GRETINA and the charged particle detector, CHICO2. The influence of axial asymmetry parameter on the shape of these nuclei along with the results of multi-configuration mixing calculations carried out within the framework of the triaxial rotor model will highlighted. Most importantly, the results on 76Ge will be compared with state-of-the-art shell model calculations and recently obtained (n,n'[gamma]) data, with emphasis on demonstrating the importance of nuclear deformation in determining the nuclear decay matrix elements.

Thursday, Sep 27 at 11:00 AM
1200 FRIB Laboratory
Tommy Tsang and Linda Hlophe , NSCL
Highlights in Progress

Abstract:  Tommy Tsang- Neutron star properties from gravitation wave and nuclear physics constraints and Linda Hlophe- Few-body universality in the deuteron-alpha system

Sunday, Sep 30 at 6:00 PM
Traverse City, MI
,
7th International Conference on Trapped Charged Particles and Fundamental Physics 2018 (TCP 2018)
Tuesday, Oct 02 at 11:00 AM
1200 FRIB Laboratory
Alessandro Lovato, Argonne National Laboratory
Theory Seminar - Title to be announced
Friday, Oct 05 at 2:00 PM
1200 FRIB Laboratory
Lukas Rammelmueller, Institute for Nuclear Physics, TU Darmstadt
Theory Seminar - Title to be announced
Monday, Oct 08 at 12:30 PM
1400 Biomedical and Physical Sciences Building
Chris Fryer, Los Alamos National Laboratory
JINA-CEE Seminar - Title to be announced
Wednesday, Oct 10 at 4:10 PM
1200 FRIB Laboratory
Dorothea Schumann, Paul Scherrer Institute
Harvesting Exotic Radionuclides at PSI

Abstract:  High-energetic protons and secondary particles induce in matter the production of a big variety of radionuclides, some of them being very rare, exotic, and, in several cases, difficult to obtain by complementary reactions. These isotopes are of high importance in research fields like nuclear astrophysics, basic nuclear physics or environmental science, and sufficient sample material for scientific experiments is urgently needed. Highly-activated components stemming from the surroundings or parts of a high-power particle accelerator are a unique possibility to gain such valuable isotopes. The advantage of “mining” isotopes from waste materials consists in their principal availability, not requiring “extra” beam time. The challenge is their radiochemical isolation from the matrix. PSI operates the Spallation Neutron Source SINQ, which is driven by one of the most powerful high-energetic proton accelerators world-wide (590 MeV, up to 2.4 mA), and is therefore best-suited as a producer of such rare exotic radionuclides. In the frame of the ERAWAST (Exotic Radionuclides from Accelerator Waste for Science and Technology) initiative a complex program for isotope separation from different matrices has been established at PSI within the past decade. The talk presents an overview on the isotope resources at PSI, the methods for isolation and sample preparation as well as some of the highlights in scientific application.