Measurement of Electric Field Gradients in High-Critical-   Temperature Superconducting Ceramics Using PAC Spectroscopy
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The PI's will measure electric field gradients (efgs) in high-                  critical-temperature superconducting ceramic materials such as                  YBa2Cu3O9-x(x=2) using Perturbed Angular Correlation (PAC)                      Spectroscopy.  The PAC technique measures the electric quadrupole               interactions of radioactive probe nuclei, which have been substituted           into specific lattice sites.  The results may provide either evidence           in support of the BCS theory or evidence of different mechanism of              superconductivity.
[{'FirstName': 'Wayne', 'LastName': 'Huebner', 'PI_MID_INIT': None, 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Wayne Huebner', 'EmailAddress': 'huebner@umr.edu', 'NSF_ID': '000297868', 'StartDate': '09/01/1987', 'EndDate': None, 'RoleCode': 'Co-Principal Investigator'}, {'FirstName': 'Gary', 'LastName': 'Catchen', 'PI_MID_INIT': 'L', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Gary L Catchen', 'EmailAddress': 'g9c@psu.edu', 'NSF_ID': '000219503', 'StartDate': '09/01/1987', 'EndDate': None, 'RoleCode': 'Principal Investigator'}]
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