A. Janata

Nuclear orientation of radioactive nuclei. The spin project

Based on the state of the art of technological achievements new complementary nuclear orientation facilities - the SPIN facilities-are developed and constructed at the Joint Institute for Nuclear Research (JINR) in Dubna and at the Faculty of Mathematics and Physics of Charles University in Prague. These facilities together with the existing and planned JINR radioactive beam complexes YASNAPP and DRIBs will open new horizons for many new experiments with oriented nuclei in a broad range of atomic and mass numbers and nuclear half-lives. This will enable to accomplish a rich program in nuclear and solid state physics research-the SPIN program at JINR.

Orientation of radioactive nuclei

Two complementary low temperature nuclear orientation facilities are being developed at JINR Dubna and at the Faculty of Mathematics and Physics of Charles University in Prague, respectively. These Facilities together with existing and planned JINR radioactive beam complexes YASNAPP and DRIBs will allow accomplish rich program in nuclear and solid state physics research. The method based on hyperfine interactions at low temperatures obtained with fast cooling top loading 3He-4He dilution refrigerators is used to orient radioactive nuclei. Using on-line coupling of the isotope production, mass separation and implantation of radioactive nuclei beams into a suitable host placed in the 3He-4He dilution refrigerator, studies of isotopes with life-times as low as 1 sec can be performed. With off-line coupling isotopes with life-times down to 1 hour can be oriented. The directional distribution and temperature dependence of the radiation from oriented nuclei as well as nuclear magnetic resonance on oriented radi...