Candidate for the 2+excited Hoyle state atEx∼10 MeV in12C
نویسندگان
چکیده
منابع مشابه
Watching the Hoyle State Fall Apart
W e are used to picturing atomic nuclei as smooth and spherical distributions of neutrons and protons. But the reality is often very different, and the carbon-12 nucleus provides the perfect case in point. In its ground state and some of its excited states, carbon’s six neutrons and six protons are thought to segregate into three clusters of two neutrons and two protons, otherwise known as heli...
متن کاملTowards the pair spectroscopy the Hoyle state
Although it is well established that the source of carbon in the universe is the 3 (triple–alpha) nuclear reaction occurring in stars, the rate at which this process occurs, via the Hoyle state in 12 C, is surprisingly poorly known. The current uncertainty of ~12.5% on the radiative width of the 7.654 MeV E0 and 3.215 MeV E2 transitions de-exciting the Hoyle state limits our understanding of s...
متن کاملStructure and rotations of the Hoyle state.
The excited state of the (12)C nucleus known as the "Hoyle state" constitutes one of the most interesting, difficult, and timely challenges in nuclear physics, as it plays a key role in the production of carbon via fusion of three alpha particles in red giant stars. In this Letter, we present ab initio lattice calculations which unravel the structure of the Hoyle state, along with evidence for ...
متن کاملAb initio calculation of the Hoyle state.
The Hoyle state plays a crucial role in the helium burning of stars heavier than our Sun and in the production of carbon and other elements necessary for life. This excited state of the carbon-12 nucleus was postulated by Hoyle as a necessary ingredient for the fusion of three alpha particles to produce carbon at stellar temperatures. Although the Hoyle state was seen experimentally more than a...
متن کاملWhen is a prediction anthropic? Fred Hoyle and the 7.65 MeV carbon resonance
The case of Fred Hoyle’s prediction of a resonance state in carbon-12, unknown in 1953 when it was predicted, is often mentioned as an example of anthropic prediction. An investigation of the historical circumstances of the prediction and its subsequent experimental confirmation shows that Hoyle and his contemporaries did not associate the level in the carbon nucleus with life at all. Only in t...
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ژورنال
عنوان ژورنال: Physical Review C
سال: 2011
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.84.054308