T. Seshi Reddy

Trace elemental analysis of cancer-afflicted intestine by PIXE technique

Trace elemental analysis was carried out in the biological samples of cancer-afflicted intestine using the particle-induced X-ray emission technique (PIXE). A 2-MeV proton beam was employed to excite the samples. From the present results, it can be seen that the concentration of the elements Cr, Fe, and Ni are higher in the cancerous tissue of the intestine than those observed in the normal tissue, whereas the concentration levels of the element Zn is slightly lower in the cancer tissue of intestine than that observed in the normal tissue. The concentrations of S, Cl, K, Ca, Ti, Mn, Co, and Cu in the cancer tissue of the intestine are in agreement with those observed in the normal tissues within standard deviations. The present results support the previous observations that Ni and Cr are carcinogenic agents. The observed slightly low levels of zinc in the cancer tissue of the intestine suggest that zinc could possibly inhibit the tumor growth and development of neoplastic transformation. For correctly assessing the role played by the trace elements in initiating, promoting, or inhibiting cancer in various organs, there is a need for the acquisition of more data by trace elemental analysis from several investigations of this type undertaken in different regions.

K x-ray satellite spectrum of Al by photon excitation

K x-ray satellite spectra of Al in the element and its oxide Al2 O3 , generated by photon excitation, have been studied with a plane crystal spectrometer. The energies and relative intensities of the K x-ray satellite and K low-energy satellite have been measured and compared with theoretical estimates. The results in the element and its oxide are compared to look for chemical effects.

Evidence for resonance electron transfer in photon excited X-ray satellite spectra of fluorine compounds

The KαL1/KαL0 intensity ratio of fluorine is measured in five fluorine compounds with a crystal spectrometer. An anomalous reduction of this intensity ratio was observed in KF and SrF2, which is attributed to resonance electron transfer from the metal ion to the spectator vacancy in the fluorine ion. KαL2/KαL0 intensity ratio of fluorine is also measured. The measured relative intensities are compared with the theoretical estimates of Aberg.

High-spin states in 99Rh

High-spin states in 99Rh are populated through a fusion evaporation reaction 16O+89Y. A comprehensive level scheme with four bands is made on the basis of coincidence studies and DCO ratios. Placements of several transitions are revised and, together with five new transitions detected in the experiment, two new bands are proposed. Two other bands populated in the previous work are confirmed. The configurations of the three quasiparticle band-head states of the new bands are suggested as ( pi (g92/)3) and ( pi (g92/)* nu (h112/)2).

Shape factor analysis of beta transitions in Pm-149

Shape factor analysis of the beta transitions in149Pm is carried out for the first time, employing an intermediate image beta ray spectrometer. The ambigous situation arising from the disagreement between reported values in end point energies and intensities of the beta transitions is clarified. An attempt was made to evaluate the NME, for the 780 keV beta transition, using Simms formalism.

Observation of aγband based on a two-quasiparticle configuration inGe70

The structure of

High spin states in102Ag

^{70}

In-beam gamma spectroscopy of 73As nucleus

Ge has been studied through in-beam gamma ray spectroscopy. A new band structure is identified that leads to forking of the ground-state band into two excited bands. Band structures have been investigated using the microscopic triaxial projected shell model approach. The observed forking is demonstrated to result from almost simultaneous band crossing of the two neutron aligned and the \gamma-band built on this two-quasiparticle configuration with the ground-state band.

Estimation of trace elements in some anti-diabetic medicinal plants using PIXE technique

High spin states are populated in102Ag using the reaction16O+89Y with projectile energies in the energy range 60–80 MeV. Gamma multipolarities are inferred from DCO ratios and coincidence relationships are established among the gamma rays assigned to102Ag. A comprehensive level scheme is constructed with four band systems, two of positive parity and the other two of negative parity. The present study extended spins upto 19− in the main negative parity band. A new band is populated in the present work and is similar to the one observed in106Ag.

Effect of radiation therapy on trace elemental concentrations of hair samples of cervical cancer patients—PIXE technique

The high spin level structure of 73As nucleus is studied by populating the nucleus in 64Ni(12C,p2n)73As reaction. Level scheme is revised significantly. Positive parity sequence is extended up to 33/2+ and a negative parity side band is identified and extended up to high spins 37/2−. In addition about 15 new energy levels and a total of about 25 new gamma transitions were placed in the level scheme.