#### Title

The astrophysically important [Formula Presented] state in [Formula Presented] and the [Formula Presented] stellar rate

#### Document Type

Article

#### Publication Date

1-1-2000

#### Abstract

Knowledge of the [Formula Presented] reaction rate is important for understanding stellar explosions, but it was uncertain because the properties of an expected but previously unobserved [Formula Presented] state in [Formula Presented] were not known. This state would provide a strong s-wave resonance for the [Formula Presented] system and, depending on its excitation energy, could dominate the stellar reaction rate at temperatures above 0.2 GK. We have observed this missing [Formula Presented] state by measuring the [Formula Presented] excitation function with a radioactive [Formula Presented] beam at the ORNL Holifield Radioactive Ion Beam Facility (HRIBF). We find that the state lies at a center-of-mass energy of [Formula Presented] keV [Formula Presented] and has a width of [Formula Presented] The measured properties of the resonance are only consistent with a [Formula Presented] assignment. © 2000 The American Physical Society.

#### Publication Source (Journal or Book title)

Physical Review C - Nuclear Physics

#### First Page

14

#### Recommended Citation

Bardayan, D., Blackmon, J., Brune, C., Champagne, A., Chen, A., Cox, J., Davinson, T., Hansper, V., Hofstee, M., Johnson, B., Kozub, R., Ma, Z., Parker, P., Pierce, D., Rabban, M., Shotter, A., Smith, M., Swartz, K., Visser, D., & Woods, P.
(2000). The astrophysically important [Formula Presented] state in [Formula Presented] and the [Formula Presented] stellar rate.* Physical Review C - Nuclear Physics**, 62* (5), 14.
https://doi.org/10.1103/PhysRevC.62.055804