Question

Дефект массы может быть отрицательным ????

Answer 1

 Он может быть как положительным, так и отрицательным; причина его возникновения — нелинейная зависимость энергии связи ядер от числа протонов и нейтронов, а также различие в массах протона и нейтрона.

Answer 2

Can mass defect be negative?

The mass defect is a concept in nuclear physics that refers to the difference in mass between a nucleus and its constituent particles (protons and neutrons). It is calculated by subtracting the mass of the nucleus from the sum of the masses of its individual particles.

The mass defect is typically a positive value, indicating that the mass of the nucleus is less than the sum of the masses of its constituent particles. This is due to the conversion of mass into energy during the formation of the nucleus. According to Einstein's mass-energy equivalence principle (E=mc²), the mass lost during the formation of the nucleus is converted into binding energy.

However, it is theoretically possible for the mass defect to be negative in certain cases. This would imply that the mass of the nucleus is greater than the sum of the masses of its constituent particles. Negative mass defect can occur in very heavy nuclei, where the strong nuclear force that binds the nucleus together becomes weaker compared to the electrostatic repulsion between protons. In such cases, the nucleus is less stable and can undergo radioactive decay.

It's important to note that negative mass defect is a rare occurrence and is not commonly observed in stable nuclei. The majority of nuclei have positive mass defects, indicating the release of energy during nuclear reactions.