P. V. Madhusudhana Rao

Transverse Wobbling in

A pair of transverse wobbling bands is observed in the nucleus ^{135}Pr. The wobbling is characterized by ΔI=1, E2 transitions between the bands, and a decrease in the wobbling energy confirms its transverse nature. Additionally, a transition from transverse wobbling to a three-quasiparticle band comprised of strong magnetic dipole transitions is observed. These observations conform well to results from calculations with the tilted axis cranking model and the quasiparticle rotor model.

^{135}

An inflight radioactive ion beam (RIB) facility is being developed at the Nuclear Science Centre (NSC), using the existing 15 UD Pelletron accelerator and the recoil mass spectrometer (RMS) HIRA. Though the basic principle of operation of the facility will be similar to those described in [1-3], ion optics of the facility are optimized for precise nuclear reaction measurements. In this facility, primary beams from the Pelletron accelerator will be used to produce RIB species using reactions such as , , etc in inverse kinematics. To ensure an efficient beam rejection for inverse kinematic reactions with good focusing of the RIB, HIRA will operate in a new ion optical mode. In this mode, there is an intermediate focal plane where a beam filtering slit system will be installed to stop primary beam particles while allowing RIB particles to be transported unhindered to the final focal plane which will be the secondary target position. In the case of many RIB species, more than one charge state will be focused into a single spot at the experimental target site. The design and installation of hardware for the facility is in progress. RIB species such , , etc, will be available with intensity in the range of - with diameter spot size with high purity. The facility is expected to be operational for user experiments by the end of 1998.

Pr

Angular distribution measurements of

Development of a radioactive ion beam facility using 15 UD tandem accelerator at NSC

^{2}\mathrm{H}

Astrophysical S{sub 17}(0) factor from a measurement of the {sup 2}H({sup 7}Be,{sup 8}B)n reaction at E{sub c.m.}=4.5 MeV

(

Observation of aγband based on a two-quasiparticle configuration inGe70

^{7}\mathrm{Be}

In-beam gamma spectroscopy of 73As nucleus

,

Evaporation residue excitation function from complete fusion of {sup 19}F with {sup 184}W

^{7}\mathrm{Be}

Abrupt change of rotation axis in {sup 109}Ag

)

New ANC measurement of the astrophysical S17‐factor from d(7Be,8B)n reaction

^{2}\mathrm{H}