High-precision mass measurements for the rp-process at JYFLTRAP
Canete, L., Eronen, T., Jokinen, A., Kankainen, A., Moore, I., Nesterenko, D., & Rinta-Antila, S. (2017). High-precision mass measurements for the rp-process at JYFLTRAP. In M. L. Cognata, M. Lattuada, S. Palmerini, R. Pizzone, & C. Spitaleri (Eds.), Nuclear Physics in Astrophysics VIII (NPA8 2017) Catania, Italy, June 18-23, 2017 (Article 01008). EDP Sciences. EPJ Web of Conferences, 165. https://doi.org/10.1051/epjconf/201716501008
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© The Authors, published by EDP Sciences, 2017. This is an open access article distributed under the terms of the Creative Commons License.
The double Penning trap JYFLTRAP at the University of Jyvaskyla has been successfully used to achieve high-precision mass measurements of nuclei involved in the rapid proton-capture (rp) process. A precise mass measurement of 31Cl is essential to estimate the waiting point condition of 30S in the rp-process occurring in type I x-ray bursts (XRBs). The mass-excess of 31Cl measured at JYFLTRAP, -7034.7(3.4) keV, is 15 more precise than the value given in the Atomic Mass Evaluation 2012. The proton separation energy Sp determined from the new mass-excess value confirmed that 30S is a waiting point, with a lowertemperature limit of 0.44 GK. The mass of 52Co effects both 51Fe(p,γ)52Co and 52Co(p,γ)53Ni reactions. The mass-excess value measured, - 34 331.6(6.6) keV is 30 times more precise than the value given in AME2012. The Q values for the 51Fe(p,γ)52Co and 52Co(p,γ)53Ni reactions are now known with a high precision, 1418(11) keV and 2588(26) keV respectively. The results show that 52Co is more proton bound and 53Ni less proton bound than what was expected from the extrapolated value. ...
Parent publication ISBN978-2-7598-9030-9
ConferenceNuclear Physics in Astrophysics
Is part of publicationNuclear Physics in Astrophysics VIII (NPA8 2017) Catania, Italy, June 18-23, 2017
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Related funder(s)Academy of Finland
Funding program(s)Academy Research Fellow, AoF; Research costs of Academy Research Fellow, AoF
Additional information about fundingThis work has been supported by the Academy of Finland under projects No. 275389 and 284516 as well as under the Finnish Centre of Excellence Programme 2012-2017 (Nuclear and Accelerator Based Physics Research at JYFL)
Except where otherwise noted, this item's license is described as © The Authors, published by EDP Sciences, 2017. This is an open access article distributed under the terms of the Creative Commons License.
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Canete, Laetitia; Kankainen, Anu; Eronen, Tommi; Gorelov, Dmitry; Hakala, Jani; Jokinen, Ari; Kolhinen, Veli; Koponen, Jukka; Moore, Iain; Reinikainen, Juuso; Rinta-Antila, Sami (Springer Berlin Heidelberg, 2016)The masses of the astrophysically relevant nuclei 25Al and 30P have been measured with a Penning trap for the first time. The mass-excess values for 25Al ( Δ=−8915.962(63) keV) and 30P ( Δ=−20200.854(64) keV) obtained with ...
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Precision Mass Measurements on Neutron-Rich Rare-Earth Isotopes at JYFLTRAP : Reduced Neutron Pairing and Implications for r-Process Calculations Vilén, Markus; Kelly, J. M.; Kankainen, Anu; Brodeur, M.; Aprahamian, A.; Canete, Laetitia; Eronen, Tommi; Jokinen, Ari; Kuta, T.; Moore, Iain; Mumpower, M. R.; Nesterenko, Dmitrii; Penttilä, Heikki; Pohjalainen, Ilkka; Porter, W. S.; Rinta-Antila, Sami; Surman, R.; Voss, Annika; Äystö, Juha (American Physical Society, 2018)The rare-earth peak in the r-process abundance pattern depends sensitively on both the astrophysical conditions and subtle changes in nuclear structure in the region. This work takes an important step towards elucidating ...