The transfer reactions of 11 B(d,p) 12 B and 12 C(d,p) 13 C, at incident energy of 11.8 MeV, have been used to extract asymptotic normalization coefficients and root-mean-square radii for the last neutron in 12 B and 13 C. It is found experimentally that the second (J ϭ2 Ϫ ) and third (J ϭ1 Ϫ ) excited states in 12 B and the first (J ϭ1/2 ϩ ) excited state in 13 C are the neutron halo states, whereas the third (J ϭ5/2 ϩ ) excited state in 13 C is a neutron skin state.

No abstract

A polysaccharide produced by 5radyrhizobium japonicum bacteroids i n nodules (NPS) on soybean (Glycine max [LI Merr.) roots is different in composition and structure from the extracellular polysaccharide produced in culture by this organism. lsogenic strains either capable or incapable of NPS synthesis supported similar rates of plant growth and nitrogenase activity, indicating that polysaccharide deposition was not detrimental. The possibility that NPS may have some protective or nutritional role for bacteroids was considered. Analysis of disintegrating nodules over periods of 1 to 3 months indicated greater recovery of viable bacteria from NPS+ nodules prior t o the breakdown of NPS. During and after the breakdown of NPS, the decline in viable bacteria was similar for NPS+ and NPS-strains. Bacteroid destruction in senescing nodules may be accelerated by exposure t o proteolytic enzymes in host cytoplasm; however, highly purified NPS had no significant effect on the i n vitro activity of partially purified proteases, so protection of bacteroids via this mechanism is unlikely. 5. japonicum USDA 438 did not utilize NPS as a carbon source for growth in liquid culture. I n vitro assays of NPS depolymerase activity in cultured bacteria and bacteroids were negative using a variety of strains, all of which contained extracellular polysaccharide depolymerase. It seems highly unlikely that 5. japonicum can utilize the polysaccharide it synthesizes in nodules, and NPS breakdown in senescing nodules is probably caused by saprophytic fungi.Certain strains of Bradyrkizobium japonicum and Bradyrkizobium elkanii (formerly B. japonicum Group 11; Kuykendall et al., 1992) synthesize large quantities of polysaccharide in soybean nodules . The NPS accumulates in the symbiosomes of infected cells and is a major feature seen in micrographs of infected cells of soybean nodules after 50 or 60 d of growth

Based on the latest design requirements proposed by the Beijing On-Line Isotope Separation (BISOL) project, a new Sn22+-based, 81.25 MHz CW radio frequency quadrupole (RFQ) with external bunching has been designed. This RFQ can accelerate Sn22+ to 0.5 MeV/u with an output longitudinal-normalized rms emittance of 0.20 keV/u·ns over a length of 5.6 m. The tolerance and error analysis results indicate that this RFQ can handle a wide range of non-ideal beams while maintaining relatively lower longitudinal emittance growth and higher transmission efficiency. To maintain the beam intensity, the RFQ will simultaneously accelerate three kinds of high-charge-state mixed ions (132Sn21+, 132Sn22+ and 132Sn23+), the simulation results given by Impact-T show that the RFQ can achieve high transmission of the mixed beam. Compared with the previous Sn21+-based internal bunching RFQ scheme, this RFQ has a shorter length and smaller output emittance, which is beneficial to the designs of subsequent Medium-energy Beam Transport (MEBT) and Drift Tube Linac (DTL). In electromagnetic design, a four-vane structure with 48 tuners and 16 π-mode stabilizers (PSLs) were chosen. The results of the multi-physics analysis show that the maximum temperature rise and the maximum deformation of the cavity are 13.6 K and 40.3 µm, respectively. The results simulated with CST Microwave Studio (CST) and HFSS software were consistent.

High-Spin States in the Odd-Proton Nucleus 135 Pm WENG Pei-Kun( ( ), YUAN Guan-Jun(# ), ZHANG Zhan-Jun(& % ), LI Sheng-Gang( ), WEN Shu-Xian( ), LI Guang-Sheng( ), DAI Zheng-Yu( ' " ), YANG Chun-Xiang(! ), PENG Zhao-Hua( ), LIU Xiang-An( ), WU Xiao-Guang( ), PU