Two-proton spectroscopy of low-lying states in Ne

M.J. Chromik; P.G. Thirolf; M. Thoennessen; B.A. Brown; T. Davinson; D. Gassmann; P. Heckman; J. Prisciandro; P. Reiter; E. Tryggestad; P.J. Woods

Two-proton spectroscopy of low-lying states in Ne

M.J. Chromik, P.G. Thirolf, M. Thoennessen, B.A. Brown, T. Davinson, D. Gassmann, P. Heckman, J. Prisciandro, P. Reiter, E. Tryggestad, P.J. Woods

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

The decay of the first two excited states of Ne (I=3/2, 5/2) has been studied via intermediate energy Coulomb excitation of a radioactive Ne beam on a Au target using a particle detector setup allowing a kinematically complete detection of the reaction products. Despite the first excited state being bound to single proton emission but unbound with respect to two proton emission, no evidence for a simultaneous two proton decay competing with the known γ decay of the 3/2 state could be observed. The 5/2 state decays via sequential two-proton emission to the ground state of O. The transition matrix elements B(E2,1/2→3/2 =66 e fm and B(E2,1/2→5/2) = 124(18)e fm have been deduced. From the nonobservation of the simultaneous two-proton emission of the 3/2 state a lifetime limit τ>26 ps could be deduced in agreement with recent theoretical calculations.

Original language	English
Pages (from-to)	243131-2431312
Number of pages	2188182
Journal	Physical Review C
Volume	66
Issue number	2
Publication status	Published - 1 Aug 2002

Cite this

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title = "Two-proton spectroscopy of low-lying states in Ne",

abstract = "The decay of the first two excited states of Ne (I=3/2, 5/2) has been studied via intermediate energy Coulomb excitation of a radioactive Ne beam on a Au target using a particle detector setup allowing a kinematically complete detection of the reaction products. Despite the first excited state being bound to single proton emission but unbound with respect to two proton emission, no evidence for a simultaneous two proton decay competing with the known γ decay of the 3/2 state could be observed. The 5/2 state decays via sequential two-proton emission to the ground state of O. The transition matrix elements B(E2,1/2→3/2 =66 e fm and B(E2,1/2→5/2) = 124(18)e fm have been deduced. From the nonobservation of the simultaneous two-proton emission of the 3/2 state a lifetime limit τ>26 ps could be deduced in agreement with recent theoretical calculations.",

author = "M.J. Chromik and P.G. Thirolf and M. Thoennessen and B.A. Brown and T. Davinson and D. Gassmann and P. Heckman and J. Prisciandro and P. Reiter and E. Tryggestad and P.J. Woods",

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TY - JOUR

T1 - Two-proton spectroscopy of low-lying states in Ne

AU - Chromik, M.J.

AU - Thirolf, P.G.

AU - Thoennessen, M.

AU - Brown, B.A.

AU - Davinson, T.

AU - Gassmann, D.

AU - Heckman, P.

AU - Prisciandro, J.

AU - Reiter, P.

AU - Tryggestad, E.

AU - Woods, P.J.

PY - 2002/8/1

Y1 - 2002/8/1

N2 - The decay of the first two excited states of Ne (I=3/2, 5/2) has been studied via intermediate energy Coulomb excitation of a radioactive Ne beam on a Au target using a particle detector setup allowing a kinematically complete detection of the reaction products. Despite the first excited state being bound to single proton emission but unbound with respect to two proton emission, no evidence for a simultaneous two proton decay competing with the known γ decay of the 3/2 state could be observed. The 5/2 state decays via sequential two-proton emission to the ground state of O. The transition matrix elements B(E2,1/2→3/2 =66 e fm and B(E2,1/2→5/2) = 124(18)e fm have been deduced. From the nonobservation of the simultaneous two-proton emission of the 3/2 state a lifetime limit τ>26 ps could be deduced in agreement with recent theoretical calculations.

AB - The decay of the first two excited states of Ne (I=3/2, 5/2) has been studied via intermediate energy Coulomb excitation of a radioactive Ne beam on a Au target using a particle detector setup allowing a kinematically complete detection of the reaction products. Despite the first excited state being bound to single proton emission but unbound with respect to two proton emission, no evidence for a simultaneous two proton decay competing with the known γ decay of the 3/2 state could be observed. The 5/2 state decays via sequential two-proton emission to the ground state of O. The transition matrix elements B(E2,1/2→3/2 =66 e fm and B(E2,1/2→5/2) = 124(18)e fm have been deduced. From the nonobservation of the simultaneous two-proton emission of the 3/2 state a lifetime limit τ>26 ps could be deduced in agreement with recent theoretical calculations.

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SN - 0556-2813

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EP - 2431312

JO - Physical Review C

JF - Physical Review C

IS - 2

ER -

Two-proton spectroscopy of low-lying states in Ne

Abstract

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