Expedited Award for Novel Research:  Mossbauer Measurement  of DX Center in III-V Semiconductors
{'Code': '07010000', 'Directorate': {'Abbreviation': 'ENG', 'LongName': 'Directorate For Engineering'}, 'Division': {'Abbreviation': 'ECCS', 'LongName': 'Div Of Electrical, Commun & Cyber Sys'}}
{'SignBlockName': 'Cassandra Queen', 'PO_EMAI': 'cqueen@nsf.gov', 'PO_PHON': '7032925383'}
The investigators propose a definitive experiment to resolve the                controversy regarding the origin of the "DX phenomenon" in n-type               A1GaAs semiconductor.  Resolution of this question is crucial to the            future development of high performance III-V semiconductors.  The two           models for the DX center, leading to loss of low temperature                    conductivity, predict different local geometries for dopant atoms.  We          propose to use Mossbauer spectroscpopy to probe the local environment           of donor tellurium atoms in A1GaAs semiconductors at 77K.  The spectrum         of undistorted substitutional donor sites will be distinguishable from          spectra of sites that are asymmetrically distorted or are associated            with vacancies or other defects.  Consequently, a careful Mossbauer             experiment should be sufficient to distinguish between the models for           the DX center.
{'FirstName': 'John', 'LastName': 'Gardner', 'PI_MID_INIT': 'A', 'PI_SUFX_NAME': 'Jr.', 'PI_FULL_NAME': 'John A Gardner', 'EmailAddress': 'John.Gardner@viewplus.com', 'NSF_ID': '000368177', 'StartDate': '01/15/1987', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'Oregon State University', 'CityName': 'CORVALLIS', 'ZipCode': '973318655', 'PhoneNumber': '5417374933', 'StreetAddress': '1500 SW JEFFERSON AVE', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Oregon', 'StateCode': 'OR', 'CONGRESSDISTRICT': '04', 'CONGRESS_DISTRICT_ORG': 'OR04', 'ORG_UEI_NUM': 'MZ4DYXE1SL98', 'ORG_LGL_BUS_NAME': 'OREGON STATE UNIVERSITY', 'ORG_PRNT_UEI_NUM': None}
{'Name': None, 'CityName': None, 'StateCode': None, 'ZipCode': None, 'StreetAddress': None, 'CountryCode': None, 'CountryName': None, 'StateName': None, 'CountryFlag': None, 'CONGRESSDISTRICT': None, 'CONGRESS_DISTRICT_PERF': '""'}
{'Code': '145600', 'Text': 'SOLID-STATE&MICROSTRUCTURE RES'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1986&All=true', 'xml': '8620324.xml'}