"Mass measurements of proton rich nuclei with JYFLTRAP"
Tommi Eronen, University of Jyväskylä
(id #99)
Seminar: NoPoster: No
Invited talk: Yes
In this talk an overview of atomic mass measurements of proton rich nuclei with the JYFLTRAP Penning trap setup located in University of Jyväskylä, Finland will be given. The proton rich nuclei of interest were produced with light and heavy ion fusion evaporation reactions at the IGISOL facility.
An extensive measurement program has been carried out to confirm and improve the decay energies associated with superallowed beta emitters. These decays contribute significantly to testing the Standard Model because the most precise value of V_ud of the Cabibbo-Kobayashi-Maskawa (CKM) quark-mixing matrix is currently derived from superallowed beta decays. These decays occur between nuclear analog states having the spin-parity 0+ and isospin T=1. There are about 15 transitions that are precisely enough known to contribute to the "world average" V_ud value. JYFLTRAP has contributed by providing high-precision Q-value data to nearly all relevant cases.
Another areas of interest have been the role of isospin symmetry in nuclear binding and mass measurements for the astrophysical rp-process. To test the isospin multiplet mass equation (IMME) the atomic mass of
23-Al was measured to a sub-keV accuracy. Also, mass measurements in the vicinity of the doubly-magic nucleus 56-Ni have been performed and decay energy values of several T_z = -1/2 nuclei have been determined. Furthermore, mass measurements for the astrophysical rp-process path have been carried out for neutron-deficient nuclei between yttrium and iodine. With the new data it appears that the SnSbTe Cycle in the rp process is quenched.
An extensive measurement program has been carried out to confirm and improve the decay energies associated with superallowed beta emitters. These decays contribute significantly to testing the Standard Model because the most precise value of V_ud of the Cabibbo-Kobayashi-Maskawa (CKM) quark-mixing matrix is currently derived from superallowed beta decays. These decays occur between nuclear analog states having the spin-parity 0+ and isospin T=1. There are about 15 transitions that are precisely enough known to contribute to the "world average" V_ud value. JYFLTRAP has contributed by providing high-precision Q-value data to nearly all relevant cases.
Another areas of interest have been the role of isospin symmetry in nuclear binding and mass measurements for the astrophysical rp-process. To test the isospin multiplet mass equation (IMME) the atomic mass of
23-Al was measured to a sub-keV accuracy. Also, mass measurements in the vicinity of the doubly-magic nucleus 56-Ni have been performed and decay energy values of several T_z = -1/2 nuclei have been determined. Furthermore, mass measurements for the astrophysical rp-process path have been carried out for neutron-deficient nuclei between yttrium and iodine. With the new data it appears that the SnSbTe Cycle in the rp process is quenched.
