1. The researches are concerned with alpha rays这些研究是关于阿尔法射线的。 2. We have shown that it is possible to create a radioactivity characterized by the emission of positive or negative electrons in boron and magnesium , by bombardment with alpha rays我们已经展示了人工放射现象的可能性,这...
Since the electromagnetic interaction extends over some distance, alpha particles don’t have to collide with an atom directly. They can transfer energy simply bypassing close by.Alpha particlesinteract with matter primarily through coulomb forcesbetween their positive charge and the negative charge of ...
Since alpha particles are very damaging biologically, they are not used for in vivo diagnostic studies. 1.2.2 Beta decay Beta particles can be either negative (negatron) or positive (positron). Beta particle has lighter mass. In negatron decay, a neutron within the parent isotope that has an...
Following conclusions are drawn by observingα-ray scattering experiment. Write the respecitve observations based on which these conclusions are drawn. (i) Non-uniform distribution of positive charge. (ii) Presence of positively -charged core or nucleus. ...
Alongside beta particles,gamma rays, and neutrons, alpha particles are a type of radiation, also called alpha radiation. As with most forms of radiation, alpha particles are emitted from radioactive elements. Alpha particles are relatively heavy and slow compared to their companions, so they pose...
BremsstrahlungX-rays(“breaking radiation”) are emitted over acontinuous spectrumas fast electrons (or beta particles) centripetally decelerate in the strong electric field near the nucleus of an ambient atom. The endpoint energy of the emitted continuous photon spectrum is the initial energy of the...
Why does beta radiation have a negative charge? Which is stronger: alpha or beta radiation? Why do gamma rays have the most energy? How deep does alpha radiation penetrate? Why are gamma rays more dangerous than radio waves? Why do gamma particles penetrate matter more easily than beta partic...
Yeast proteins coded by genes originally identified as being particularly sensitive to X-rays, many of which are involved in DNA repair and required for spontaneous and induced mitotic recombination, meiotic recombination and mating-type switching. Human homologues of many of these proteins were subsequ...
Dominant negative B. Gain of function C. Haploinsufficiency D. Loss of function E. None of the above35. A couple comes to a clinic for preconception counseling. Both the husband and the wife are of Ashkenazi Jewish descent. The family history is unremarkable on both sides. Genetic counseling...
Alpha rays carry a positive charge, beta rays carry a negative charge and gamma rays are neutral. Editor's comment: what medicine owes to science A: Plutonium emits alpha rays which get lodged in people's bones and lungs after being inhaled and could become highly carcinogenic. Q&A: How dan...