ADOPTED LEVELS, GAMMAS for 87Br
Authors: T.D. Johnson and W.D. Kulp | Citation: Nucl. Data Sheets 129, 1 (2015) | Cutoff date: 27-Jul-2015
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=6818 keV 3 | S(n)= 6331 keV 4 | S(p)= 10677 keV 4 | Q(α)= -6647 keV 4 | ||
| Reference: 2012Wa38 |
| References: | |||
| A | 87Se β- decay | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | Final Levels | |
| 0.0 | A | (5/2-) | 55.68 s 12 % β- = 100 % β-n = 2.60 4 | ||||
| 242.51 23 | A | (1/2,3/2,5/2) | 242.5 3 | 100 | 0.0 | (5/2-) | |
| 334.0 3 | A | (1/2,3/2,5/2) | 334.0 3 | 100 | 0.0 | (5/2-) | |
| 573.17 24 | A | (1/2,3/2,5/2) | 573.2 3 | 100 | 0.0 | (5/2-) | |
| 710.51 21 | A | (1/2,3/2,5/2) | 468.0 3 710.5 3 | 100 40.9 | 242.51 0.0 | (1/2,3/2,5/2) (5/2-) | |
| 1035.5 6 | A | (1/2,3/2,5/2) | 701.5 5 | 100 | 334.0 | (1/2,3/2,5/2) | |
| 1878.14 21 | A | (1/2,3/2,5/2) | 1167.6 3 1305.0 3 1878.1 3 | 78.0 75.4 100 | 710.51 573.17 0.0 | (1/2,3/2,5/2) (1/2,3/2,5/2) (5/2-) | |
| 3926.4 4 | A | (1/2,3/2,5/2) | 3683.8 5 3926.3 5 | 57.1 100 | 242.51 0.0 | (1/2,3/2,5/2) (5/2-) | |
| 3987.1 6 | A | (1/2,3/2,5/2) | 3744.5 5 | 100 | 242.51 | (1/2,3/2,5/2) | |
E(level): From least-squares fit to γ energies.
Jπ(level): Jπ of excited states determined using log ft values and population of levels in decay to 87Kr (2006Po09). Due to incomplete decay scheme, assignments are done with some risk.
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
Mass measurement: 2007Ra23 (Penning trap, JYFLTRAP at IGISOL), mass excess=-73892 4 keV
All data for excited levels are from 87Se β- decay (1980Ze04).
See 2013Co15 for production using proton-induced fission of uranium. and 2011So33 for 86Kr (15 MeV/nucleon) on 124,112Sn
Other theory: 2011Ka28 (calculated decay spectra)