The decay of the new neutron-rich isotope Bi-217

Kurpeta, J; Plochocki, A; Andreyev, Andrei; Äysto, J; De Smet, A; De Witte, H; Evensen, AH; Fedoseyev, V; Franchoo, S; Górska, M; Huhta, M; Huyse, Marc; Janas, Z; Jokinen, A; Karny, M; Kugler, E; Kurcewicz, W; Köster, U; Lettry, J; Nieminen, A; Partes, K; Ramdhane, M; Ravn, HL; Rykaczewski, K; Szerypo, J; Van de Vel, Karen; Van Duppen, Piet; Weissman, L; Walter, G; Wöhr, A; IS387 Collaboration,; ISOLDE collaboration,

doi:10.1140/epja/i2003-10065-7

The decay of the new neutron-rich isotope Bi-217

Author:

Kurpeta, J

Plochocki, A ; Andreyev, Andrei ; Äysto, J ; De Smet, A ; De Witte, H ; Evensen, AH ; Fedoseyev, V ; Franchoo, S ; Górska, M ; Huhta, M ; Huyse, Marc ; Janas, Z ; Jokinen, A ; Karny, M ; Kugler, E ; Kurcewicz, W ; Köster, U ; Lettry, J ; Nieminen, A ; Partes, K ; Ramdhane, M ; Ravn, HL ; Rykaczewski, K ; Szerypo, J ; Van de Vel, Karen ; Van Duppen, Piet ; Weissman, L ; Walter, G ; Wöhr, A ; IS387 Collaboration, ; ISOLDE collaboration,

Keywords:

Science & Technology, Physical Sciences, Physics, Nuclear, Physics, Particles & Fields, Physics, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, 5106 Nuclear and plasma physics, 5107 Particle and high energy physics, 5110 Synchrotrons and accelerators

Abstract:

Exotic, neutron-rich proton-induced spallation products of Th-232 and U-238 obtained from the PS Booster ISOLDE facility have been investigated by gamma-gamma, alpha-gamma coincidence and spectrum-multiscaling measurements. A new method for the reduction of isobaric contamination enabled to study the unknown region beyond Pb-208 for the decay chain A = 217. A new isotope Bi-217 with a half-life of 98.5 +/- 0.8 s was discovered and its beta-decay studied. For the first time, a half-life value of 1.53 +/- 0.03 s for the alpha-decay of Po-217 was measured.