and his collaborators have employed the no-core Gamow shell model to study the structure of the resonance 0 + 2 state of helium-4. The research was published in Physical Review Letters and ...

Atoms of group 7 elements have seven electrons in their outer shell, and atoms of group 0 elements, except helium, have eight electrons in their outer shell. The reactions of elements are related ...

Stars like our sun fuse hydrogen in their cores into helium ... which creates an expanding shell of gas called a planetary nebula. Within this nebula, the hot core of the star remains—crushed ...