Target cusp

Figs. 10 and 11 for helium. This feature is closely analogous to the one observed for ve = vp for electron capture to the continuum mechanism or to electron loss to the continuum which is often referred to as the cusp. The electrons with v, vr 0 in the low-lying continuum states of the target ion also form a sharp peak known as the target cusp. ... 

The whole spectrum is dominated by the ECC peak, which, in accordance with theory, extends much higher than the experimental data. The cusp itself shows the usual asymmetry, with cross sections after the peak falling off more steeply than before it. The binary peak is negligibly small at this projectile energy because the projectile velocity is of the same magnitude as the velocity spread associated with the target electron. 

We are currently on the cusp of a new era in the treatment of cancers whereby we will learn to incorporate new drugs that are likely not cytotoxic on their own but when used in combination with standard chemotherapy and radiation hold the promise of superior tumor responses that will hopefully translate into improved local control and improved survival. At the same time it is reasonable to expect an increased selectivity for malignant cells compared to normal tissues given that many of these targets are either not altered in normal cells or their expression is not usually increased in normal tissues. This leads to the anticipation of no increase in normal tissue toxicities when these novel targeted agents are used to treat patients. 

Fig. 13. Propagation of waves in the presence of two windows. Parameters are as in Figure 9 with h = S, I2 = 10. (a) Waves emerging from both windows propagate in compartment II and form cusp-type structure (Ato = 3). (b) Target waves propagate from the largest window and inhibit the propagation emanating from the smallest window (Au =1).

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