학술논문
Decay spectroscopy of element 115 daughters:Rg280→Mt276 and Mt276→Bh272
Document Type
article
Author
Gates, JM; Gregorich, KE; Gothe, OR; Uribe, EC; Pang, GK; Bleuel, DL; Block, M; Clark, RM; Campbell, CM; Crawford, HL; Cromaz, M; Di Nitto, A; Düllmann, Ch E; Esker, NE; Fahlander, C; Fallon, P; Farjadi, RM; Forsberg, U; Khuyagbaatar, J; Loveland, W; Macchiavelli, AO; May, EM; Mudder, PR; Olive, DT; Rice, AC; Rissanen, J; Rudolph, D; Sarmiento, LG; Shusterman, JA; Stoyer, MA; Wiens, A; Yakushev, A; Nitsche, H
Source
Physical Review C. 92(2)
Subject
Language
Abstract
Forty-six decay chains, assigned to the decay of 115288, were produced using the Am243(Ca48,3n)115288 reaction at the Lawrence Berkeley National Laboratory 88-in. cyclotron. The resulting series of α decays were studied using α-photon and α-x-ray spectroscopies. Multiple α-photon coincidences were observed in the element 115 decay chain members, particularly in the third- and fourth-generation decays (presumed to be Rg280 and Mt276, respectively). Upon combining these data with those from 22 115288 decay chains observed in a similar experiment, updated level schemes in Mt276 and Bh272 (populated by the α decay of Rg280 and Mt276, respectively) are proposed. Photons were observed in the energy range expected for K x rays coincident with the α decay of both Rg280 and Mt276. However, Compton scattering of higher-energy γ rays and discrete transitions are present in the K x-ray region preventing a definitive Z identification to be made based on observation of characteristic K x-ray energies.