[en] Excitation functions for Fr isotopes produced by bombardment of ¹²C on ²⁰⁹Bi and the production of neutron deficient isotopes ¹¹⁸I, ¹¹⁷I and ¹¹⁵I by ¹²C on natural silver are presented. Two He-jet systems are described. Decay of three γ rays are plotted

[en] Extensive theoretical as well as experimental investigation of the nuclear structure of odd-mass iodine nuclei have revealed systematic presence of strongly coupled bands in all neutron deficient as well as neutron rich odd-mass iodine isotopes. The present work shows that the positive as well as the negative parity are fairly well reproduced in the framework of particle rotor model

[en] Bone gamma-carboxyglutamic acid (gla)-containing protein (BGP) is a major constituent protein of bone matrix. The protein is synthesized by osteoblast-like cells in culture and is induced by 1,25-dihydroxyvitamin D. BGP has been demonstrated to circulate in plasma. From these data the hypothesis has developed that measurement of plasma BGP may have clinical utility as a marker of skeletal metabolism. This paper reviews the methods available for the development of radioimmunoassays (RIA) for human BGP (hBGP) and the potential clinical applications. (Auth.)

[en] In odd-A nuclei above Z ≈ 50, exhibit coexistence of states with different degrees of collectivity. The neutron deficient transitional nuclei (Z ≈ 53) features well developed rotational structures. The occupancy of [550]1/2^- and [404]9/2⁺ intruder orbitals from the bottom of πh_11/2 and top of πg_9/2 subshell respectively result in sizeable prolate quadrupole deformation, β₂ ~ 0.25. The competition between single-particle and collective degree of freedom determines the structure of nuclei at high spins. At high spins, the nuclear angular momenta are generated more efficiently by aligning valence nucleons rather than by the collective rotation of nuclei. In this scenario, rotational structure gives way to more complex single-particle structures. Non-collective oblate states have been observed to perturb the smooth nature of the yrast sequence in ¹¹⁵I. In this context, the measurement of nuclear level lifetimes in neutron deficient ¹¹⁵I is important to understand the nucleon-nucleon interaction. Previously, spectroscopic investigations have been carried out in ¹¹⁵I. In the present work, lifetimes have been measured for the excited states in ¹¹⁵I using Doppler Shift Attenuation (DSA) method

[en] By using the microscopic approach of Projected Shell Model (PSM), negative-parity band structures of odd mass neutron-rich "1"1"5","1"1"7I nuclei have been studied with the deformed single-particle states generated by the standard Nilsson potential. For these isotopes, the band structures have been analyzed in terms of quasi-particles configurations. The phenomenon of back bending in moment of inertia is also studied in the present work.

[en] In the present work, PSM calculations for prolate band structures for "1"1"5","1"1"7I have been analyzed. We have calculated some nuclear structure properties (such as yrast spectra, band diagrams, etc.) corresponding to prolate quadrupole deformation and the experimental data is very well reproduced by the PSM wave function

[en] Average radiation widths < GAMMAsub(γ)> are calculated by a method that permits application to exotic nuclei where little spectroscopic information is available. The calculations are tested against 62 near-stable nuclei and - for the first time this has been possible - against 5 exotic nuclei for which < GAMMAsub(γ)> has now been measured. Excellent results are obtained if level densities are calculated with the back-shifted Fermi gas model but not if Gilbert and Cameron densities are used. (orig.)

[en] For the last few years the He-jet technique has been studied and developed. By means of this technique a number of experiments have been performed on synthesis of neutron deficient isotopes. The measurement of excitation functions for Fr isotopes produced by bombardment of ¹²C on ²⁰⁹Bi and the production of neutron deficient isotopes ¹¹⁸I, ¹¹⁷I and ¹¹⁵I by ¹²C on natural silver are presented. (Auth.)

[en] The ⁹²Mo(²⁷Al,2p2nγ) reaction has been used to populate high-spin states in ¹¹⁵I. At the highest spins, favoured states with I^π = 43-/2 and 51-/2, associated with non-collective oblate configurations, are yrast. The systematics of such states in the odd-A ^115-121I isotopes are discussed. (Author)

[en] Six new rotational bands have been established in ¹¹⁵I at high spin using the near symmetric ⁶⁰Ni(⁵⁸Ni,3pγ) reaction at 250 MeV. Several of the bands are observed to frequencies beyond ℎω=1.0 MeV (spin approaching 50ℎ). All the bands show a characteristic drop off in their dynamic moments of inertia with increasing spin. The low values at the highest spins are consistent with predictions for a band termination in which a gradual shape change from collective prolate to noncollective oblate occurs over many transitions. these smoothly occurring terminations contrast with the abrupt ''favored'' terminations previously observed in this and other odd-A iodine nuclei