Investigation of the Delta n=0 selection rule in Gamow-Teller transitions: The beta-decay of Hg-207
- Berry, T. A.
- Podolyak, Zs
- Carroll, R. J.
- Lica, R.
- Grawe, H.
- Timofeyuk, N. K.
- Alexander, T.
- Andreyev, A. N.
- Ansari, S.
- Borge, M. J. G.
- Creswell, J.
- Fahlander, C.
- Fraile, L. M.
- Fynbo, H. O. U.
- Gelletly, W.
- Gerst, R-b
- Gorska, M.
- Gredley, A.
- Greenlees, R.
- Harkness-Brennan, L. J.
- Huyse, M.
- Judge, S. M.
- Judson, D. S.
- Konki, J.
- Kurcewicz, J.
- Kuti, I
- Lalkovski, S.
- Lazarus, I
- Lund, M.
- Madurga, M.
- Marginean, N.
- Marginean, R.
- Marroquin, I
- Mihai, C.
- Mihai, R. E.
- Nacher, E.
- Nae, S.
- Negret, A.
- Nita, C.
- Page, R. D.
- Pascu, S.
- Patel, Z.
- Perea, A.
- Pucknell, V
- Rahkila, R.
- Rapisarda, E.
- Regan, P. H.
- Rotaru, F.
- Shand, C. M.
- Simpson, E. C.
- Sotty, Ch
- Stegemann, S.
- Stora, T.
- Tengblad, O.
- Turturicag, A.
- Van Duppen, R.
- Vedia, V.
- Wadsworth, R.
- Walker, P. M.
- Warr, N.
- Wearing, F.
- De Witte, H.
DOIAbstract
Gamow-Teller beta decay is forbidden if the number of nodes in the radial wave functions of the initial and final states is different. This Delta n = 0 requirement plays a major role in the beta decay of heavy neutron-rich nuclei, affecting the nucleosynthesis through the increased half-lives of nuclei on the astrophysical r-process pathway below both Z = 50 (for N > 82) and Z = 82 (for N > 126). The level of forbiddenness of the Delta n = 1 nu 1g(9/2) -> pi 0g(7/2) transition has been investigated from the beta(-) decay of the ground state of Hg-207 into the single-proton-hole nucleus Tl-207 in an experiment at the ISOLDE Decay Station. From statistical observational limits on possible gamma-ray transitions depopulating the pi 0g(7/2)(-1) ...
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