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Tanaka, M.; Itahashi, T.; Kondo, M.; Fujiwara, M.; Ogata, H.; Ohshima, T.; Katori, K.
Reports of the workshop on lasers in nuclear physics1988
Reports of the workshop on lasers in nuclear physics1988
AbstractAbstract
[en] A great demand for polarized heavy ion beams as a future experimental tool to explore intermediate and high energy nuclear physics has been inquired from both experimental and theoretical points of view. To answer this, construction of a polarized heavy ion source is dispensable. As one of promising polarized heavy ion sources we offered a new type polarized heavy ion source based on spin and charge exchange collisions between highly stripped ions and polarized alkali-metal vapor in view of the expectation that such an ion source can provide every polarized light-heavy ion with a spin. For this purpose, a prototype is now under construction, aiming mainly at the delivery of polarized 3He. A 2.45-GHz ECR (electron cyclotron resonance) ion source with a hexapole magnetic field was prepared and is tuned for getting highly stripped heavy ions. The polarization of alkali-metal vapor is accomplished by means of a laser optical pumping with a single mode ring dye (R6G) laser with an intensity of ∼ 1 w pumped by an Ar-ion laser. As an alternative method to polarize Na vapor, an optical pumping of Rb vapor with a semiconductor laser is recommended. A new idea of the 3He polarization using the metastable 3S1 state is proposed. It is also emphasized that the present polarization method may enable us to polarize short-lived radioactive nuclei with kinetic energies about a few MeV/A. This will allow the measurements related to spin observables, for example, the measurement of nuclear moments, with radioactive nuclei. Over a decade, polarization phenomena in heavy ion reactions have received much interest. Many institutes have constructed or planned to construct heavy ion sources (see Table I). However, we must remind ourselves that above polarized ion sources except lowest three cases have been dedicated to the low energy accelerators, i.e., their energies attainable are limited to lower than ∼ 10 MeV/A. (author)
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Osaka Univ., Ibaraki (Japan). Research Center for Nuclear Physics; 187 p; 1988; p. 78-93; Workshop on lasers in nuclear physics; Ibaraki, Osaka (Japan); 8-9 Dec 1987
Record Type
Report
Literature Type
Conference
Report Number
Country of publication
ACCELERATORS, AMPLIFIERS, ANGULAR MOMENTUM, BEAMS, CHARGED PARTICLES, CYCLIC ACCELERATORS, CYCLOTRON RESONANCE, CYCLOTRONS, ENERGY LEVELS, EQUIPMENT, EVEN-ODD NUCLEI, EXCITED STATES, HEAVY ION ACCELERATORS, HELIUM ISOTOPES, IONS, ISOCHRONOUS CYCLOTRONS, ISOTOPES, LASERS, LIGHT NUCLEI, MATERIALS, NUCLEI, PARTICLE PROPERTIES, RESONANCE, STABLE ISOTOPES
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