α-cluster structure in F19 and Ne19 in resonant scattering - INSPIRE

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α-cluster structure in F19 and Ne19 in resonant scattering

Jan 18, 2022

8 pages

Published in:

Phys.Rev.C 105 (2022) 1, 014615

Published: Jan 18, 2022

DOI:

10.1103/PhysRevC.105.014615 (publication)

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Nuclear Science References

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Abstract: (APS)

The nuclear structure of

{}^{19}F

and

{}^{19}{Ne}

is important for understanding of

α

clustering in the

A = 20

mass region and in questions related to astrophysics. However, the only high-resolution broad angular and energy range study of the

{}^{19}F

resonance structure in

α + {}^{15}N

scattering was published over 60 years ago, and a detailed analysis of complex excitation functions of overlapping resonances with several decay channels was simply impossible at that time. We performed a modern

R

-matrix analysis of these old data to assign spins and specify resonant parameters of levels up to excitation energy of 8.2 MeV in

{}^{19}F

. We successfully tested our

R

-matrix parameters in a fit of the recent data on

α + {}^{15}N

obtained by thick target inverse kinematics (TTIK) method at 180 degrees. We used the new parameters for

{}^{19}F

to fit TTIK data for

α + {}^{15}O

, the mirror resonant reactions. The comparison of the data for isobaric mirror resonant reactions provides an interesting insight into the nuclear structure.

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