학술논문
Strong evidence for 9N and the limits of existence of atomic nuclei
Document Type
Working Paper
Author
Charity, R. J.; Wylie, J.; Wang, S. M.; Webb, T. B.; Brown, K. W.; Cerizza, G.; Chajecki, Z.; Elson, J. M.; Estee, J.; Hoff, D. E. M; Kuvin, S. A.; Lynch, W. G.; Manfredi, J.; Michel, N.; McNeel, D. G.; Morfouace, P.; Nazarewicz, W.; Pruitt, C. D.; Santamaria, C.; Sweany, S.; Smith, J.; Sobotka, L. G.; Tsang, M. B.; Wuosmaa, A. H.
Source
Subject
Language
Abstract
The boundaries of the Chart of Nuclides contain exotic isotopes that possess extreme proton-toneutron asymmetries. Here we report on strong evidence of 9N, one of the most exotic proton-rich isotopes where more than one half of its constitute nucleons are unbound. With seven protons and two neutrons, this extremely proton-rich system would represent the first-known example of a ground-state five-proton emitter. The invariant-mass spectrum of its decay products can be fit with two peaks whose energies are consistent with the theoretical predictions of an open-quantum-system approach, however we cannot rule out the possibility that only a single resonance-like peak is present in the spectrum.
Comment: 4 figures, 7pages
Comment: 4 figures, 7pages