[en] Short note

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[en] In the investigations reported optical methods are used to determine the photo-ionization energy and the concentration of defects created by neutron and gamma radiation. The changes in electrical characteristics of the diodes are investigated, and a comparison is made between various types of diodes. (author)

[en] In the investigations reported optical methods are used to determine the photo-ionization energy and the concentration of defects created by neutron and gamma radiation. The changes in electrical characteristics of the diodes are investigated, and a comparison is made between various types of diodes. (Auth.)

[en] 1. A multi-disciplinary approach within the framework of the lake catchment ecosystem provides a basis for studying environmental processes through time. 2. Using magnetic susceptibility measurements, it is possible to correlate a large number of sediment cores economically and rapidly, and hence to calculate sediment volumes and masses, and chemical flux. A combination of radiometric (²¹⁰Pb and ¹³⁷Cs) and palaeomagnetic dating methods allows influx data to be placed on an absolute timescale. 3. Linking the sediment influx records to a landscape history derived from pollen, diatom and land use records suggests that sediment yield from the catchment has been most affected by anthropogenic activity. In particular, early deforestation accelerated sediment loss from ca. 0.25 t ha^-1 yr^-1 to 0.86-2.5 t ha^-1 yr^-1 within a period of 1000 yr. The period AD 1300-1550 witnessed a drop in sediment yield to 0.5-1.5 ha^-1 yr^-1, perhaps related to the agrarian depression, and recent expansion of the cultivated area has led to a 1.5 fold increase in sediment yield. 4. Reconstructions of P flux in present and AD 1682 catchments suggests that in contrast to the highly subsidised present system, the earlier system ran at a net loss with losses of P at a rate of 1.5 kg ha^-1 yr^-1. 5. Close calibration of sediment and environmental records may form the basis for reconstructing environmental processes and for quantifying environmental thresholds, time-lags, response and recovery rates. This represents an important extension to contemporary process studies based on monitoring over short timescales. (author)

[en] The single-nucleon form factor, or overlap integral, is a fundamental link between the nuclear structure and the reaction amplitude for knock-out or pick-up reactions. A formalism for calculating form factors between deformed nuclear states by means of angular momentum projection is presented. Intrinsic states are generated by the modified oscillator potential and refinements by isospin projection and an effective interaction are made. Results from applications to the reaction ¹⁶O(p, 2p)¹⁵N and ¹²C(p, 2p)¹¹B are presented. (Auth.)