Decay of a Resonance in 18Ne by the Simultaneous Emission of Two Protons.
Radioactive ion beams of 17F were used to study several resonance states in 18Ne. Clear evidence for simultaneous two-proton emission from the 6.15 MeV state (Jpi = 1(-)) in 18Ne has been observed with the reaction 17F+1H. Because of limited angular coverage, the data did not differentiate between the two possible mechanisms of simultaneous decay, diproton (2He) emission or direct three-body decay. The two-proton partial width was found to be 21+/-3 eV assuming 2He emission and 57+/-6 eV assuming three-body decay. The total width of the 1(-) state was measured to be 50+/-5 keV. Several additional resonances that decay by single proton emission were also studied.
Gómez Del Campo J
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831.
Galindo-Uribarri
A
Beene
JR
Gross
CJ
Liang
JF
Halbert
ML
Stracener
DW
Shapira
D
Varner
RL
Chavez-Lomeli
E
Ortiz
ME