Probing the limit of nuclear existence:: Proton emission from 159Re

被引:49
作者
Joss, D. T. [1 ]
Darby, I. G.
Page, R. D.
Uusitalo, J.
Eeckhaudt, S.
Grahn, T.
Greenlees, P. T.
Jones, P. M.
Julin, R.
Juutinen, S.
Ketelhut, S.
Leino, M.
Leppanen, A. -P.
Nyman, M.
Pakarinen, J.
Rahkila, P.
Saren, J.
Scholey, C.
Steer, A.
Cannon, A. J.
Stevenson, P. D.
Al-Khalili, J. S.
Erturk, S.
Venhart, M.
Gall, B.
Hadinia, B.
Simpson, J.
机构
[1] Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England
[2] CCLRC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England
[3] Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland
[4] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England
[5] Nigde Univ, Fen Edebiyat Falkultesi, Fizik Bolumu, Nigde, Turkey
[6] Comenius Univ, Dept Nucl Phys & Biophys, Bratislava 84248 4, Slovakia
[7] Univ Strasbourg, CNRS, IN2P3, IPHC, F-67037 Strasbourg 2, France
[8] Royal Inst Technol, Dept Phys, SE-10691 Stockholm, Sweden
基金
英国科学技术设施理事会;
关键词
NUCLEAR REACTIONS Ni-58+Cd-106 at 300 MeV beam energy; enriched targets; gas-filled recoil separator; Si detectors; measured E (p); (t)1; /; 2;
D O I
10.1016/j.physletb.2006.08.014
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The observation of the new nuclide Re-159(75)84 provides important insights into the evolution of single-particle structure and the mass surface in heavy nuclei beyond the proton drip line. This nuclide, 26 neutrons away from the nearest stable rhenium isotope, was synthesised in the reaction Cd-106(Ni-58, p4n) and identified via its proton radioactivity using the RITU gas-filled separator and the GREAT focal-plane spectrometer. Comparisons of the measured proton energy (E-p = 1805 +/- 20 keV) and decay half-life (t(1/2) = 21 +/- 4 mu s) with values calculated using the WKB method indicate that the proton is emitted from an h(11/2) state. The implications of these results for future experimental investigations into even more proton unbound nuclei using in-flight separation techniques are considered. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:34 / 37
页数:4
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