Details

Autor(en) / Beteiligte

• Zhang, Z. Y.
• Yang, H. B.
• Huang, M. H.
• Gan, Z. G.
• Yuan, C. X.
• Qi, C.
• Andreyev, A. N.
• Liu, M. L.
• Ma, L.
• Zhang, M. M.
• Tian, Y. L.
• Wang, Y. S.
• Wang, J. G.
• Yang, C. L.
• Li, G. S.
• Qiang, Y. H.
• Yang, W. Q.
• Chen, R. F.
• Zhang, H. B.
• Lu, Z. W.
• Xu, X. X.
• Duan, L. M.
• Yang, H. R.
• Huang, W. X.
• Liu, Z.
• Zhou, X. H.
• Zhang, Y. H.
• Xu, H. S.
• Wang, N.
• Zhou, H. B.
• Wen, X. J.
• Huang, S.
• Hua, W.
• Zhu, L.
• Wang, X.
• Mao, Y. C.
• He, X. T.
• Wang, S. Y.
• Xu, W. Z.
• Li, H. W.
• Ren, Z. Z.
• Zhou, S. G.

Titel

New α -Emitting Isotope U 214 and Abnormal Enhancement of α -Particle Clustering in Lightest Uranium Isotopes

Ist Teil von

• Physical review letters, 2021-04, Vol.126 (15), Article 152502

Erscheinungsjahr

2021

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• A new alpha-emitting isotope U-214, produced by the fusion-evaporation reaction W-182(Ar-36,4n) U-214, was identified by employing the gas-filled recoil separator SHANS and the recoil-a correlation technique. More precise a-decay properties of even-even nuclei U-216,U-218 were also measured in the reactions of Ar-40, Ca-40 beams with W-180,W-182,W- 184 targets. By combining the experimental data, improved alpha-decay reduced widths delta(2) for the even-even Po-Pu nuclei in the vicinity of the magic neutron number N = 126 are deduced. Their systematic trends are discussed in terms of the N-p N-n scheme in order to study the influence of protonneutron interaction on a decay in this region of nuclei. It is strikingly found that the reduced widths of( 214,216)U are significantly enhanced by a factor of two as compared with the NpNn systematics for the 84 <= Z <= 90 and N < 126 even-even nuclei. The abnormal enhancement is interpreted by the strong monopole interaction between the valence protons and neutrons occupying the pi 1f (7/2) and nu 1f(5/2) spin-orbit partner orbits, which is supported by the large-scale shell model calculation.