Publications (3)7.37 Total impact
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Article: Spectroscopy of neutron-unbound $^{27,28}$F
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ABSTRACT: The ground state of $^{28}$F has been observed as an unbound resonance $2\underline{2}0$ keV above the ground state of $^{27}$F. Comparison of this result with USDA/USDB shell model predictions leads to the conclusion that the $^{28}$F ground state is primarily dominated by $sd$-shell configurations. Here we present a detailed report on the experiment in which the ground state resonance of $^{28}$F was first observed. Additionally, we report the first observation of a neutron-unbound excited state in $^{27}$F at an excitation energy of $25\underline{0}0 (2\underline{2}0)$ keV.03/2012; -
Article: Exploring the Low-$Z$ Shore of the Island of Inversion at $N = 19$
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ABSTRACT: The technique of invariant mass spectroscopy has been used to measure, for the first time, the ground state energy of neutron-unbound $^{28}\textrm{F},$ determined to be a resonance in the $^{27}\textrm{F} + n$ continuum at $2\underline{2}0 (\underline{5}0)$ keV. States in $^{28}\textrm{F}$ were populated by the reactions of a 62 MeV/u $^{29}\textrm{Ne}$ beam impinging on a 288 $\textrm{mg/cm}^2$ beryllium target. The measured $^{28}\textrm{F}$ ground state energy is in good agreement with USDA/USDB shell model predictions, indicating that $pf$ shell intruder configurations play only a small role in the ground state structure of $^{28}\textrm{F}$ and establishing a low-$Z$ boundary of the island of inversion for N=19 isotones.Physical Review Letters 01/2012; 108(3). · 7.37 Impact Factor -
Article: Spectroscopy of neutron-unbound $^27,28mathrmF$
Phys. Rev. C. 01/2012; 85(3):034327.
Top Journals
Institutions
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2012
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Michigan State University
- Department of Physics and Astronomy
East Lansing, MI, USA
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