In this study, the gamma and X-ray emission intensities of 161Tb were determined using a high-purity germanium spectrometer. The samples used previously standardised by coincidence counting Triple to Double Coincidence Ratio (TDCR) methods. A total 28 gamma-rays 4 X-rays measured compared with previous measurements performed more than 30 years ago. Most lines are in agreement, while large discr...

Abstract This work is a feasibility study designed to test and develop the (p,p′γ) detection capabilities at iThemba LABS when K600 magnetic spectrometer 0° coupled an array of high purity germanium cerium-doped lanthanum bromide detectors. done through investigation into low-lying E1 strength 58 Ni with proton beam E p = 80 MeV. The coincidence matrix energies excited states subsequent γ decay...

High-purity germanium (HPGe) single crystals find their applications as radiation detectors especially for spectroscopy of high-energy photons and particles in nuclear physics. Growing “detector-grade” HPGe crystals, with tailored structural defects controlled impurity content, uniform throughout the crystal is a challenging task this type crystalline semiconductor material. All different proce...

Laser cooling of matter through anti-Stokes photoluminescence, where the emitted frequency light exceeds that impinging laser by virtue absorption thermal vibrational energy, has been successfully realized in condensed media, and particular with rare-earth-doped systems achieving sub-100 K solid-state optical refrigeration. Studies suggest semiconductors potential temperatures down to ≈10 its d...

Neutrinoless double-beta (0νββ) decay is practically the only way to establish the Majorana nature of the neutrino mass and its decay rate provides a probe of an effective neutrino mass. Double beta experiments are long-running underground experiments with specific challenges concerning the background reduction and the long term stability. These problems are addressed in this work for the Heide...

Using an innovative time-varying front-end electronics in conjunction with a bulky coaxial high-purity germanium detector, we were able to extend the range of the radionuclide spectra well beyond the analog to digital converter (ADC) saturation point. The electronics automatically conditions the signal for digital-filtering optimization if it is in the ADC voltage range and for time-over-thresh...

The EGS4 Monte Carlo simulation technique was used to obtain the energy spectra of photons arriving at a detector from the pulse height distributions measured by the same detector. First, the measured pulse height distribution for incident photons from several radiation sources such as 60Co, 137Cs, 152Eu and 207Bi with a collimator are compared with those calculated using the EGS4 code to inves...

We measured the excitation functions of (nat)Zn (p,x) reactions up to 17.6MeV, using the stacked-foils activation technique. High-purity natural zinc (and copper) foils were irradiated with proton beams generated by an 18MeV isochronous cyclotron. Activated foils were measured using high-purity Ge gamma spectroscopy to quantify the radionuclides (61)Cu, (66)Ga, (67)Ga, and (65)Zn produced from ...

Germania glass was prepared from high purity GeO2 powder. Refractive-index dispersion was used to calculate material dispersion and to provide a model for representing the dispersion of GeO2-SiO2 glasses. The wavelength of zero material dispersion is found to be in agreement with theoretical calculations. Modal propagation is modeled for a GeO2 core-silica clad fiber. Results support compositio...