- 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, CE
- 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
- et al.
© 2015 American Physical Society. 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.