Abstract
The decay of20Na of astrophysical reactions has been studied deeply via20Ne(p, n)20Na reaction. A new β-delayed α decay with α energy of 5 896 ± 6 keV and relative intensity of 0.002 4 ± 0. 000 3 was discovered. At the same time the16O recoiling in β+-delayed α decay of20Na was observed in experiment for the first time. From these, it is inferred that a β-delayed low energy α decay of20Na with energy of ∼780 keV and relative intensity of ∼1.4 was mixed in16O recoiling. In16O recoiling and the low energy α decay, the energy loss for low energy charged particles through matter was discussed in detail. At last, two methods for discriminating the β-delayed low energy α decay of20Na were proposed.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Macfarlane, R. D., Siivola, A., Isobaric spin non-conservation in the delayed alpha decay of20Na,Nucl. Phys., 1964, 59: 168.
Pearson, J. D., Almqvist, E., Kuehner, J. A., Levels in20Ne from the12C(12C, α)20Na reaction,Can. J. Phys., 1964, 42: 489.
Kubono, S., Ikeda, N., Funatsu, Y.et al., Decay property of20Na for the onset mechanism of the rapid-proton process,Phys. Rev. C, 1992, 46:361.
Xu, X. J., Ma, R. C., Huang, W. X.et al., First observation of P-delayed proton decay of the proton drip line nuclide19Na,High Energy Physics and Nuclear Physics, 1995, 19:203.
Clifford, E. T. H., Hagberg, E., Hardy, J. C.et al., The decay of20Na,Nucl. Phys. A, 1989, 493:293.
Lamm, L. O., Browne, C. P., Görres, J.et al., Level structure of20Na near the proton threshold, Z.Phys. A, 1987, 327: 239.
Kubono, S., Ikeda, N., Yasue, M.et al., The p+19Ne s-wave resonant state in20Na at stellar energies, Z.Phys. A, 1988, 331:359.
Hotchkis, M. A. C., Reiff, J. E., Vieira, D. J.etal., Beta-delayed proton decay of61Ge,Phys. Rev. C, 1987, 35:315.
Torgerson, D. F., Wien, K., Fares, Y.etal., β+ decay of20Na,Phys. Rev. C, 1973, 8:161.
Ajzenberg-selove, F., Energy levels of light nuclei A = 18-20,Nucl. Phys. A, 1987, 475:1.
Fudan University. Tsinghua University and Peking University,Erprimental Methods in Nuclear Physics, Ekijing: Atomic Energy Press, 1985, 37.
Livingston, M. S., Bethe, H. A., Nuclear physics-C, nuclear dynamics, experimental,Rev. Mod. Phys., 1937, 9:263.
Walske, M. C., The stopping power of K-electrons,Phys. Rev., 1952, 88:1283.
Walske, M. C., Stopping power of L -electrons,Phys. Rev., 1956, 101:940.
Bethge, K.,Experintenla1 Methods in Heavy Ion Physics, Berlin: Springer-Verlag, 1978, 81.
Lindhard, J., Scharff, M., Energy dissipation by ions in the keV region,Phys. Rev., 1961, 124:128.
Author information
Authors and Affiliations
Additional information
Project supported by the Chinese Academy of Sciences and the National Natural Science Foundation of China.
Rights and permissions
About this article
Cite this article
Huang, W., Xu, X., Ma, R. et al. Decay study of20Na and its beta-delayed16O recoiling. Sci. China Ser. A-Math. 40, 638–643 (1997). https://doi.org/10.1007/BF02876068
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02876068