Mass measurements in the vicinity of the r p-process and the nu p-process paths with the Penning trap facilities JYFLTRAP and SHIPTRAP
View/
Author
Weber, C.
Elomaa, V. -V.
Ferrer, R.
Froehlich, C.
Ackermann, D.
Aystoe, J.
Audi, G.
Batist, L.
Blaum, K.
Block, M.
Chaudhuri, A.
Dworschak, M.
Eliseev, S.
Eronen, T.
Hager, U.
Hakala, J.
Herfurth, F.
Hessberger, F. P.
Hofmann, S.
Jokinen, A.
Kankainen, A.
Kluge, H. -J.
Langanke, K.
Martin, A.
Martinez-Pinedo, G.
Mazzocco, M.
Moore, I. D.
Neumayr, J. B.
Novikov, Yu. N.
Penttilae, H.
Plass, W. R.
Popov, A. V.
Rahaman, S.
Rauscher, T.
Rauth, C.
Rissanen, J.
Rodriguez, D.
Saastamoinen, A.
Scheidenberger, C.
Schweikhard, L.
Seliverstov, D. M.
Sonoda, T.
Thielemann, F. -K.
Thirolf, P. G.
Vorobjev, G. K.
Attention
2299/10392
Abstract
The masses of very neutron-deficient nuclides close to the astrophysical r p- and nu p-process paths have been determined with the Penning trap facilities JYFLTRAP at JYFL/Jyvaskyla and SHIPTRAP at GSI/Darmstadt. Isotopes from yttrium (Z=39) to palladium (Z=46) have been produced in heavy-ion fusion-evaporation reactions. In total, 21 nuclides were studied, and almost half of the mass values were experimentally determined for the first time: (88)Tc, (90-92)Ru, (92-94)Rh, and (94,95)Pd. For the (95)Pd(m), (21/2(+)) high-spin state, a first direct mass determination was performed. Relative mass uncertainties of typically delta m/m=5x10(-8) were obtained. The impact of the new mass values has been studied in nu p-process nucleosynthesis calculations. The resulting reaction flow and the final abundances are compared with those obtained with the data of the Atomic Mass Evaluation 2003.