Search for 2 p decay of the first excited state of 17Ne
Abstract
Two-proton decay of the 17Ne low-lying states populated in the 1H(18Ne,d )17Ne transfer reaction is studied. The two-proton width Γ2 p of the 17Ne first excited 3 /2- state at E*=1.288 MeV is of importance for the two-proton radioactivity theory and nuclear-astrophysics applications. A dedicated search for the two-proton emission of this state was performed leading to the new upper limit obtained for the width ratio Γ2 p/Γγ<1.6 (3 ) ×10-4 . An original, "combined mass" method is suggested and tested as capable of improving the resolution of the experiment, which is a prime significance for the study of nuclear states with extremely small particle-to-gamma width ratios Γpart/Γγ . The condition Γpart≪Γγ is quite common for the states of astrophysical interest, which makes the proposed approach promising in this field.
- Publication:
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Physical Review C
- Pub Date:
- August 2017
- DOI:
- 10.1103/PhysRevC.96.025807
- arXiv:
- arXiv:1612.04697
- Bibcode:
- 2017PhRvC..96b5807S
- Keywords:
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- Nuclear Experiment
- E-Print:
- Phys. Rev. C 96, 025807 (2017)