Dynamic nuclear polarization of irradiated target materials

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1982

OSTI ID:6822425

Seely, M L

Polarized nucleon targets used in high energy physics experiments usually employ the method of dynamic nuclear polarization (DNP) to polarize the protons or deuterons in an alcohol. DNP requires the presence of paramagnetic centers, which are customarily provided by a chemical dopant. These chemically doped targets have a relatively low polarizable nucleon content and suffer from loss of polarization when subjected to high doses of ionizing radiation. If the paramagnetic centers formed when the target is irradiated can be used in the DNP process, it becomes possible to produce targets using materials which have a relatively high polarizable nucleon content, but which are not easily doped by chemical means. Furthermore, the polarization of such targets may be much more radiation resistant. Dynamic nuclear polarization in ammonia, deuterated ammonia, ammonium hydroxide, methylamine, borane ammonia, butonal, ethane and lithium borohydride has been studied. These studies were conducted at the Stanford Linear Accelerator Center using the Yale-SLAC polarized target system. Results indicate that the use of ammonia and deuterated ammonia as polarized target materials would make significant increases in polarized target performance possible.

• Research Organization: Yale Univ., New Haven, CT (USA)
• OSTI ID: 6822425
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430303* -- Particle Accelerators-- Experimental Facilities & Equipment
ALKALI METAL COMPOUNDS
ALKANES
AMINES
AMMONIA
BARYONS
BORON COMPOUNDS
DATA
DEUTERIDES
DEUTERIUM COMPOUNDS
DOPED MATERIALS
ELEMENTARY PARTICLES
ETHANE
EXPERIMENTAL DATA
FERMIONS
HADRONS
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXIDES
INFORMATION
LITHIUM COMPOUNDS
MAGNETISM
MATERIALS
METHYLAMINE
NATIONAL ORGANIZATIONS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUCLEONS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PARAMAGNETISM
POLARIZED TARGETS
PRODUCTION
STANFORD LINEAR ACCELERATOR CENTER
TARGETS
US DOE
US ERDA
US ORGANIZATIONS