Competition between Allowed and First-Forbidden beta Decay : The Case of Hg-208 -> Tl-2(0)8

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Pysyväisosoite

http://hdl.handle.net/10138/324881

Lähdeviite

Carroll , R J , Podolyak , Z , Berry , T , Grawe , H , Alexander , T , Andreyev , A N , Ansari , S , Borge , M J G , Brunet , M , Creswell , J R , Fraile , L M , Fahlander , C , Fynbo , H O U , Gamba , E R , Gelletly , W , Gerst , R-B , Gorska , M , Gredley , A , Greenlees , P T , Harkness-Brennan , L J , Huyse , M , Judge , S M , Judson , D S , Konki , J , Kurcewicz , J , Kuti , I , Lalkovski , S , Lazarus , I H , Lica , R , Lund , M , Madurga , M , Marginean , N , Marginean , R , Marroquin , I , Mihai , C , Mihai , R E , Nacher , E , Negret , A , Nita , C , Pascu , S , Page , R D , Patel , Z , Perea , A , Phrompao , J , Piersa , M , Pucknell , V , Rahkila , P , Rapisarda , E , Regan , P H , Rotaru , F , Rudigier , M , Shand , C M , Shearman , R , Stegemann , S , Stora , T , Sotty , C , Tengblad , O , Van Duppen , P , Vedia , V , Wadsworth , R , Walker , P M , Warr , N , Wearing , F & De Witte , H 2020 , ' Competition between Allowed and First-Forbidden beta Decay : The Case of Hg-208 - > Tl-2(0)8 ' , Physical Review Letters , vol. 125 , no. 19 , 192501 . https://doi.org/10.1103/PhysRevLett.125.192501

Julkaisun nimi: Competition between Allowed and First-Forbidden beta Decay : The Case of Hg-208 -> Tl-2(0)8
Tekijä: Carroll, R. J.; Podolyak, Zs; Berry, T.; Grawe, H.; Alexander, T.; Andreyev, A. N.; Ansari, S.; Borge, M. J. G.; Brunet, M.; Creswell, J. R.; Fraile, L. M.; Fahlander, C.; Fynbo, H. O. U.; Gamba, E. R.; Gelletly, W.; Gerst, R-B; Gorska, M.; Gredley, A.; Greenlees, P. T.; Harkness-Brennan, L. J.; Huyse, M.; Judge, S. M.; Judson, D. S.; Konki, J.; Kurcewicz, J.; Kuti, I.; Lalkovski, S.; Lazarus, I. H.; Lica, R.; Lund, M.; Madurga, M.; Marginean, N.; Marginean, R.; Marroquin, I.; Mihai, C.; Mihai, R. E.; Nacher, E.; Negret, A.; Nita, C.; Pascu, S.; Page, R. D.; Patel, Z.; Perea, A.; Phrompao, J.; Piersa, M.; Pucknell, V.; Rahkila, P.; Rapisarda, E.; Regan, P. H.; Rotaru, F.; Rudigier, M.; Shand, C. M.; Shearman, R.; Stegemann, S.; Stora, T.; Sotty, Ch; Tengblad, O.; Van Duppen, P.; Vedia, V.; Wadsworth, R.; Walker, P. M.; Warr, N.; Wearing, F.; De Witte, H.
Muu tekijä: University of Helsinki, Helsinki Institute of Physics
Päiväys: 2020-11-02
Kieli: eng
Sivumäärä: 6
Kuuluu julkaisusarjaan: Physical Review Letters
ISSN: 0031-9007
URI: http://hdl.handle.net/10138/324881
Tiivistelmä: The beta decay of Hg-208 into the one-proton hole, one neutron-particle Tl-208(81)127 nucleus was investigated at CERN-ISOLDE. Shell-model calculations describe well the level scheme deduced, validating the proton-neutron interactions used, with implications for the whole of the N > 126, Z <82 quadrant of neutron-rich nuclei. While both negative and positive parity states with spin 0 and 1 are expected within the Q(beta) window, only three negative parity states are populated directly in the beta decay. The data provide a unique test of the competition between allowed Gamow-Teller and Fermi, and first-forbidden beta decays, essential for the understanding of the nucleosynthesis of heavy nuclei in the rapid neutron capture process. Furthermore, the observation of the parity changing 0(+) -> 0(-)beta decay where the daughter state is core excited is unique, and can provide information on mesonic corrections of effective operators.
Avainsanat: 114 Physical sciences
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