No abstract

Energy levels up to ^~4-MeV excitation energy are studied using the (d,p) and (d,t) reactions. Spectroscopic factors for most of the levels are obtained with the aid of distorted-wave Born-approximation (DWBA) calculations. The J + state is not identified in Sn 123 and Sn 125 . Several new 1 = 2 states are identified as well as several 1=1 and 1=3 states belonging to the 82~126-neutron shell. A renormalization of the DWBA absolute cross sections is performed to eliminate systematic inconsistencies in the sum of Uf+Vf. The factors of renormalization are found to be within the well-known uncertainties of the DWBA calculations. The values of relative single-particle energies (e,-€ 5 / 2 ) are calculated both from the occupation numbers (Uj 2 or V 3 A ) and from the single-quasiparticle energies (Ej) using pairing theory. The results are in disagreement by as much as 1 MeV or more. From the reactions on the odd isotopes, spin and parity information is obtained for many states in Sn 114 , Sn 116 , Sn 118 , and Sn 120 .-\ 3.28 (3) 3.83 J L. J L. 0 10 20 30 40 50 0 10 20 30 40 50 9 (degrees) FIG. 4. Angular distributions for the proton groups leading to the state of Sn 115 . See also caption for Fig. 3. SCHNEID, PRAKASH, AND COHEN

No abstract

No abstract

Three types of alkaloidal constituents, viz., beta-phenethylamines, quinazolines and carboxylated tryptamines, in addition to choline and betaine have been isolated from Sida acuta Burm., S. humilis Willd., S. rhombifolia L., and S. spinosa L. and characterized by their physical and spectral properties, and by chemical transformations. The qualitative and quantitative variations in the alkaloidal constituents of roots and aerial portions at different stages of growth were also noted. Elaboration of the quinazoline alkaloids seems to be a characteristic feature of this genus. The favourable combination of sympathomimetic amines and vasicinone in these species would account for their major therapeutic uses in the Indian system of medicine.